question 3 consider a certain type of nucleus that has a decay rate constant of 0.0250 min-1. calculate the time required for the sample to decay to one-fourth of its initial value.
Answer:
since the decay rate constant of0.0 250 min.
hence the time required for the sample to decay to one forth of it's initial value is
Step-by-step explanation:
Answer:
Step-by-step explanation:
guys help please. Enter the value for x that makes the equation 5x-2+3+-7 HELP
Step-by-step explanation:
5x-2+3-7
0=5x-9+3
0=5x-6
6=5x
x=6/5
rita, john, and kareem sent a total of 92 text messages during the weekend. kareem sent 4 times as many messages as rita. john sent 10 fewer messages than rita. how many messages did they each send?
Rita, John, and Kareem sent 17, 7, and 68 messages, respectively.
Use algebraic expressions to solve this problem.
Let x, y, and z be the number of messages sent by Rita, John, and Kareem, respectively.
If Rita, John, and Kareem sent a total of 92 text messages during the weekend, then:
x + y + z = 92
If Kareem sent 4 times as many messages as Rita, then:
z = 4 * x
z = 4x
If John sent 10 fewer messages than Rita, then:
y = x - 10
Evaluating z = 4x and y = x - 10 to the first equation:
x + y + z = 92
x + (x - 10) + 4x = 92
x + x - 10 + 4x = 92
6x = 92 + 10
6x = 102
x = 17
Recall that y = x - 10:
y = 17 - 10
y = 7
And z = 4x:
z = 4(17)
z = 68
If x, y, and z are the number of messages sent by Rita, John, and Kareem, respectively, then Rita, John, and Kareem sent 17, 7, and 68 messages, respectively.
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Ben’s annual salary is £22000. He spends 15% of this on rent. How much is his rent per month
Answer:
£275
Step-by-step explanation:
To find how much Ben's rent is per month, we first have to find how much Ben spends on rent annually (every year). We can do this by multiplying his annual salary by the percentage spent on rent.
22000 · 0.15 = 3300
Now that we know Ben spends 3300 on rent a year, we can divide that amount by 12 (the number of months in a year) to find out how much his rent is per month.
3300 / 12 = 275
Rewrite 20 − 4x^3 using a common factor.
4x(5 − x^2)
4(5 − 4x^3)
2x(10 − 2x^2)
2(10 − 2x^3)
Answer:
4x(5 − x^2)
Step-by-step explanation:
20 − 4x^3
= 4x(5 − x^2)
The equivalent expression after taking a common factor is,
⇒ 2 (10 - 2x³)
What is Mathematical expression?
The combination of numbers and variables by using sign addition, subtraction, multiplication and division is called Mathematical expression.
Given that;
The expression is;
⇒ 20 - 4x³
Now, Take common factor as;
⇒ 20 - 4x³ = 2 × 10 - 2 × 2x³
= 2 (10 - 2x³)
Thus, The equivalent expression after taking a common factor is,
⇒ 2 (10 - 2x³)
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Carol is baking cookies and needs 2/1/4 cups of flower 2/3 cups with sugar 1/4cups of brown sugar and 1/16 cups of baking soda use the information to answer the following question
Answers
3/8
2/3
2
2/2/3
The quotient when we divide the amount of white sugar by the brown sugar will be 2 2/3
How to calculate the value?From the information, it was stated that Carol is baking cookies and needs 2/1/4 cups of flower 2/3 cups with sugar 1/4cups of brown sugar and 1/16 cups of baking soda.
The quotient when we divide the amount of white sugar by the brown sugar will be:
= 2/3 ÷ 1/4
= 2/3 × 4/1
= 2 2/3
Therefore, the quotient is 2 2/3.
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Carol is baking cookies and needs 2 1/4 cups of flour 2/3 cup of white sugar 1/4 cup of brown sugar and 1/16 cup of baking soda use this information to answer the following questions
divide the amount of white sugar by the amount of brown sugar. what is the quotient? (must be a fraction)
Write an compound inequality for the following graph.
The compound inequality for the graph is -5 ≤ x ≤ -1
How to write a compound inequality for the following graph?On the graph, we have the following endpoints
Endpoint 1 = -5 (closed circle)Endpoint 2 = -1 (closed circle)Also, the region between endpoints is shaded.
This means that the endpoint is a union inequality
So, we have the compound inequality to be
Endpoint 1 ≤ x ≤ Endpoint 2
This gives
-5 ≤ x ≤ -1
Hence, the compound inequality for the graph is -5 ≤ x ≤ -1
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The average rain in Annette, Alaska, in September is 0.31 inch per day. How much rain falls over the course of an average September? (September has 30 days)
Answer:
9.3
Step-by-step explanation:
If it rains 0.31 in per day and there is 30 days in September that means you need to MULTIPLY0.31
× 0.30
-----------------
0.30
9.30
-----------
9.6
help pls i don’t know this
Which of the following shows the equation after the variables have been collected on the left and the constants have been collected on the right? −2x+13=−7x+28
−9x=15
5 x= 15
5x=41
−9x=41
Evaluate. 7+2^2⋅6+2^3−6
adoncia makes a scale drawing of the front of the lincoln memorial she uses a scale of 15 ft in the monument to 1 in In the drawing the front of the monument is about 80ft high and 200ft long will adoncia drawing fit on an 8 1/2 in by 11 in sheet of paper
No, the Adoncia drawing will not fit on the drawing sheet.
Given adoncia is drawing to scale, she uses a 15-foot scale in the 1-inch monument. And in the drawing, the front of the monument is about 80 feet high and 200 feet long.
The given parameters are;
The scale of the drawing in the front of the monument is 15 ft = 1 in.
Actual size of the monument;
Height = 80 feet
Length = 200 feet.
So we have;
Required size of paper height = 80/15 = 16/3 = 5.33 in.
Required size of paper length = 200/15 = 40/3 = 13.33 in.
The size of the paper is 11 in. about the size of a standard 8.5-inch sheet of letterhead. equals 11 in.
Design length, 13.33" > Paper length > 11".
Therefore, when Adoncia draws a scale drawing of the front of the linco and she uses the 15ft scale in the 1in monument, the drawing does not fit on the paper.
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Alisa drove from her house to the beach at a speed of 55 miles per hour. If it took her 1.8 hours to get to the beach, about how many miles away from the beach is Alisa's house?
Alisa's house is about 99 miles from the beach
What is speed?Speed is the distance travelled per unit. Mathematically, it can be expressed as:
Speed = distance / time
With above formula, we can determine the distance of Alisa's house from the beach. Details below
How to determine the distanceThe following data were obtained from the question:
Speed = 55 miles per hourTime = 1.8 hoursDistance =?The distance of Alisa's house from the beach can be obtained as followed:
Speed = distance / time
Cross multiply
Distance = speed × time
Distance = 55 × 1.8
Distance = 99 miles
Thus, Alisa's house is about 99 miles from the beach
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The distance between the beach and Alisa's house is 99 miles.
About how many miles away from the beach is Alisa's house?Here we need to use the general relation:
Distance = Speed*Time.
Here we know that Alisa's speed is 55 miles per hour, and she drives for 1.8 hours, then we can replace:
Speed = 55 mi/h
Time = 1.8 hours
Replacing that in the distance relation we will get:
D = (55 mi/h)*(1.8 h)= 99 mi
The distance between the beach and Alisa's house is 99 miles.
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What is the value of the expression that is described as “half the difference of 14 and 8”?
Answer:
I would say 6
Step-by-step explanation:
Difference is subtraction.
when w=3 , x=2 , y= -4 , z= -2
wx/2 +y
Answer:
=-1
Step-by-step explanation:
3x2/2 + -4
6/2 + -4
3 + (-4)
=-1
Answer:
-1
Step-by-step explanation:
Brackets
Indicies
Division
Multiplication
Addition
Subtraction
3 × 2/2 + -4
no brackets. no indicies.
Division
2/2 = 1
3 × 1 + -4
Multiplication
3 × 1 = 3
Addition
3 + -4 = -1
Rearrange Vf^2=Vi^2+2aX for Vi
Making Vi the subject of formula gives the following expression: Vi = √(Vf² - 2aX).
What is an expression?An expression can be defined as a mathematical equation which is used to show the relationship existing between two or more variables and numerical quantities.
How to make Vi the subject of formula?In this exercise, you're required to describe the steps that should be taken to rearrange and make Vi the subject of formula. Therefore, the appropriate and required steps are listed as follows:
Vf² = Vi² + 2aX
Subtracting 2aX from both sides of the equation, we have:
Vf² - 2aX = Vi² + 2aX - 2aX
Vi² = Vf² - 2aX
Taking the square root of both sides, we have:
Vi² = Vf² - 2aX
Vi = √(Vf² - 2aX)
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Rewrite x4y2 − 6x3y3 using a common factor.
1: x2y2(x2 − 6xy)
2: x2y(xy − 6xy2)
3: 6xy(x3y − x2y)
4: 6xy2(x2 − x2y)
The value of expression by using common factor is x³y² (x - 6y).
Here,
The expression is,
x⁴y² - 6x³y³
We have to solve by using common factor.
What is Mathematical expression?
The combination of numbers and variables by using operations addition, subtraction, multiplication and division is called Mathematical expression.
Now,
The expression is,
x⁴y² - 6x³y³
By using common factor we solve as,
x⁴y² - 6x³y³ = x*x*x*x*y*y - 6*x*x*x*y*y*
= x³y² (x - 6y)
Hence, The value of expression by using common factor is x³y² (x - 6y).
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Please look at ALL of the screenshots and answer correctly! 20 points that's half of all of mine<: there will be another half with it!!!! the link to it is https://brainly.com/question/28634975?answeringSource=feedPublic%2FhomePage%2F21
Answer:
1. 13^5
2. prime
3. 8
4. 13
5. 6
Over line TU has a midpoint at M(5,5) . Point T is at (1,8). Find the coordinates of point U.
Using the midpoint formula, the coordinates of point U are: (9, 2).
How to Apply the Midpoint Formula?The midpoint formula is: M[(x2 + x1)/2, (y2 + y1)/2]
Given the following:
Midpoint of TU is at: M(5,5)
Point T is at (1, 8), therefore, let:
M(5,5) = (x, y)
T(1, 8) = (x1, y1)
U(?, ?) = (x2, y2)
Plug in the values
M(5, 5) = [(x2 + 1)/2, (y2 + 8)/2]
5 = (x2 + 1)/2
10 = x2 + 1
10 - 1 = x2
9 = x2
x2 = 9
5 = (y2 + 8)/2
10 = y2 + 8
10 - 8 = y2
2 = y2
y2 = 2
The coordinates of point U are: (9, 2).
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Over a period of 12 hours the temperature dropped 36 F. What was the average change in temperature in one hour?
The following figure shows the entire graph of a relationship. A coordinate plane. The x- and y-axes each scale by one. There is a vertical line graphed at x equals negative five. A coordinate plane. The x- and y-axes each scale by one. There is a vertical line graphed at x equals negative five. Does the graph represent a function? Choose 1 answer: Choose 1 answer: (Choice A) A Yes (Choice B) B No
Answer:
(Choice A) A Yes
Step-by-step explanation:
Please help ASAP
What is the prime factorization of 90?
2 × 3 × 5
2 × 3 × 5
2 × 2 × 3 × 5
2 × 2 × 3 × 5
2 × 3 × 3 × 5
2 × 3 × 3 × 5
2 × 5 × 9
Answer:
the prime factorizime of 90 is this 2 × 3 × 3 × 5 or 2 × 3² ×5
2 Shape 1 and Shape 2 are congruent pentagons.
Shape 1
Shape 2
Shape 2 is congruent to Shape 1 because -
A.
Shape 2 is a translation of Shape 1.
B. Shape 2 is a reflection of Shape 1.
C. Shape 2 is a rotation of Shape 1.
D. Shape 2 and Shape 1 are both pentagons.
Option B) is correct that is shape 2 is congruent to shape 1 because shape 2 is reflection of shape 1.
We know that two figures or objects are congruent if they have the same shape and size or they are the mirror image of each other.
Translation : It simply means moving. Every point should be moved in same distance and in same direction
Rotation : It means turning around a center.
Reflection : In this, the image is of the same size as the pre-image.
So according to the given figure we can see that the shape is not translated or rotated from a center but is reflected as shape 1 is the image of shape 2.
Hence shape 2 is congruent to shape 1 because shape 2 is reflection of shape 1.
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the distance a falling object travels towards the earth is directly proportional to the square of the time that it falls. if an orange falls 16 feet in 4 seconds, how far will it fall in 8 seconds ?
The orange will fall 64 feet in 8 seconds.
Distance:
Distance is defined as how much ground an object has covered despite its starting or ending point.
Given,
The distance a falling object travels towards the earth is directly proportional to the square of the time that it falls.
And an orange falls 16 feet in 4 seconds.
Here we need to find the how far it will fall in 8 seconds.
Based on the given details,
We know the that distance is,
D = kt²
where
k is the constant of proportionality.
To find the value of k we have to apply the given values on the equation.
=> 16 = k x (4)²
=> 16 = k x 16
=> k = 16/16
=> k = 1.
So, in 8 seconds it will fall at
=> D = 1 x (8)²
=> D = 1 x 64
=> D = 64 feet.
Therefore, the orange will fall at 64 feet in 8 seconds.
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shayna enlarged a square photo by adding 10 inches to each side so it could be seen on a large poster. the area of the enlarged photo is 256 square inches. in the equation (x 10)2
The dimensions of the original photo are 6 x 6.
What is an area?A rectangle is a quadrilateral having four sides and the sum of the angles is 180 in the rectangle the opposite two sides are equal and parallel and the two sides are at 90-degree angles.
The formula for a square's area, A = s², is the side length raised to the power of two. The 256 in2 section of the larger image was made available to us. Additionally, it was mentioned that the length of the expanded image is equal to the original image's length plus ten inches.
We can therefore create an equation to solve for x, which stands for the length of the original snapshot, based on the aforementioned statements.
A = s²
where s = ( x + 10 )
A = ( x+10 )² = 256
Solving for x,
x = 6 in.
The dimensions of the original photo are 6 x 6.
The complete question is given below:-
Shayna enlarged a square photo by adding 10 inches to each side so it could be seen on a large poster. The area of the enlarged photo is 256 square inches. In the equation (x + 10)2 = 256, x represents the side measure of the original square photo. What were the dimensions of the original photo?
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State the minimum monthly income and hourly wage per worker needed to cover monthly expenses for the family you used in part a. Then, explain how to calculate the hourly wage based on the monthly income and state the hourly wage. Assume that each full-time worker works four 40-hour work weeks per month, and each part-time worker works two 40-hour weeks per month.
(Please Answer with good details)
Answer:
Full-time worker minimum monthly income = US$ 7,846.40
Part-time worker minimum monthly income = US$ 7,846.40
Full-time worker hourly wage = US$ 49.04
Part-time worker hourly wage = US$ 98.08
Step-by-step explanation:
1. Let's review the information given to answer the question correctly:
Monthly costs of a 2-adult and 3-children family in the Modesto metro area = US$ 7,846
Full-time worker = 4 weeks of 40-hour per month
Part-time worker = 2 weeks of 40-hour per month
2. Let's calculate the minimum monthly income and hourly wage per worker
Full-time worker hourly wage = Monthly costs/160
Part-time worker hourly wage = Monthly costs/80
Full-time worker hourly wage = 7,846/160
Part-time worker hourly wage = 7,846/80
Full-time worker hourly wage = US$ 49.04
Part-time worker hourly wage = US$ 98.08
Full-time worker minimum monthly income = Hourly wage * 160
Part-time worker minimum monthly income = Hourly wage * 80
Full-time worker minimum monthly income = US$ 7,846.40
Part-time worker minimum monthly income = US$ 7,846.40
2 l2x+7l = 16
Please help me with this ASAP
Answer:
x = 1/2 and
x = -15/2
Step-by-step explanation:
First, get the absolute value alone on one side if the equation.
2 |2x + 7 | = 16
Divide both sides by 2.
| 2x + 7 | = 8
Once the absolute value sign is by itself, you will separate the equation into two separate equations.
2x+7=8 and 2x+7=-8
Solve these two equations separately and get two solutions.
2x + 7 = 8
Subtract 7.
2x = 1
Divide by 2.
x = 1/2 Here is one solution.
2x + 7 = -8
Subtract 7.
2x = -15
Divide by 2.
x = -15/2 Here is a second solution.
Answer:
x = - [tex]\frac{15}{2}[/tex] , x = [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
2 | 2x + 7 | = 16 ( divide both sides by 2 )
| 2x + 7 | = 8
the absolute value function always gives a positive result, but the expression inside can be positive or negative , that is
2x + 7 = 8 ( subtract 7 from both sides )
2x = 1 ( divide both sides by 2 )
x = [tex]\frac{1}{2}[/tex]
or
- (2x + 7) = 8
- 2x - 7 = 8 ( add 7 to both sides )
- 2x = 15 ( divide both sides by - 2 )
x = - [tex]\frac{15}{2}[/tex]
As a check
substitute these values into the left side and if equal to the right side then they are a solution
x = [tex]\frac{1}{2}[/tex]
2 | 2([tex]\frac{1}{2}[/tex] ) + 7 | = 2 | 1 + 7 | = 2 | 8 | = 16 = right side
x = - [tex]\frac{15}{2}[/tex]
2 | 2(- [tex]\frac{15}{2}[/tex] ) + 7 | = 2 | - 15 + 7 | = 2 | - 8 | = 2 | 8 | = 16 = right side
then x = - [tex]\frac{15}{2}[/tex] and x = [tex]\frac{1}{2}[/tex] are the solutions
The product of two consecutive positive integers is 110. Find the value of the lesser
integer.
can someone please help me? i’ve been struggling with factoring for a little bit now.
Factor.
81-22
Answer:59
Step-by-step explanation:
81-22=59
answer is 59 because 59 is a prime number
Multiply (4x^2 +8)^2
Answer:
5/2 or 2.5
Step-by-step explanation
Five over two or two and 5 tenths