Answer:
a) Escribe un sistema de ecuaciones para representar esta situación.
x + y = 81 ...... Ecuación 1
x - y = 33 ....... Ecuación 2
b) Los dos números son: 57 y 24
Step-by-step explanation:
Estamos tratando con 2 números
Dejar
El primer número = x
El segundo número = y
La suma de dos números es 81.
x + y = 81 ...... Ecuación 1
La diferencia de los mismos dos números es 33.
x - y = 33 ....... Ecuación 2
Escribe un sistema de ecuaciones para representar esta situación.
x + y = 81 ...... Ecuación 1
x - y = 33 ....... Ecuación 2
Resolvemos estas ecuaciones usando el método de eliminación
Restamos la ecuación 2 de la ecuación 1 para eliminar
2y = 48
y = 48/2
y = 24
Resolver para x usando la Ecuación 1
x + y = 81 ...... Ecuación 1
x + 24 = 81
x = 81 - 24
x = 57
Por lo tanto, los dos números son: 57 y 24
please help me please will give brainliest to anyone who is good
show your reasons
Answer:
Option D
Step-by-step explanation:
She is selling tickets for $10 each, and if 1,007 people attended, that would be: $10,070 in proceeds. So, you then subtract that from the balance at the bank: -$3,200.
-$3,200 + $10,070 = $6,870 balance.
6. Which is longer, a mile or a kilometer? How can you tell?
ANSWER ASAP GIVING BRAINLIEST
Answer:
A mile is longer
Step-by-step explanation:
?????????????? ?????
Answer:
A. x² - x
General Formulas and Concepts:
Pre-Algebra
Distributive PropertyAlgebra I
Terms/Coefficients/DegreesExpand by FOIL (First Outside Inside Last)Geometry
Area of a Rectangle: A = lwStep-by-step explanation:
Step 1: Define
l = x
w = x - 1
Step 2: Find A
Substitute [AR]: A = x(x - 1)Distribute x: A = x² - x-7x - 12 = - 7х + 3(-4 - x)
Answer:
[tex]x=0[/tex]
Step-by-step explanation:
[tex]-7x - 12 = - 7x + 3(-4 - x)[/tex]
Open up the parentheses
[tex]-7x - 12 = - 7x -12-3x[/tex]
-7x cancels out on both sides
[tex]-12 =-12-3x[/tex]
-12 cancels out on both sides
[tex]0=-3x\\x=0[/tex]
I hope this helps!
A bakery sells 44 large boxes of muffins and 50 small boxes of muffins in one day. Each large box holds 20 muffins, and each small box holds 15 muffins. What is the total number of muffins sold on this day?
Answer: 1630 Muffins
Step-by-step explanation:
You multiply 44 x 20. (880)
Then you multiply 15 x 50 (750)
Then you add them together
880 + 750 = 1630 Muffins
Hope this helped :D
The total number of muffins sold on this day will be 1,630.
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
A bakery sells 44 large boxes of muffins and 50 small boxes of muffins in one day. Each large box holds 20 muffins, and each small box holds 15 muffins.
The total number of muffins sold on this day will be calculated as,
⇒ 44 x 20 + 50 x 15
⇒ 880 + 750
⇒ 1,630
The total number of muffins sold on this day will be 1,630.
More about the Algebra link is given below.
https://brainly.com/question/953809
#SJP5
Write the product in its simplest form
Answer:
9u^8v^3
Step-by-step explanation:
Here are the weekly allowances for 10 Grade 7 students:
$9, $11, $13, $15, $20, $10, $12, $15, $10, $15
What is the mean allowance?
Mean allowance of the given students is equals to $13.
What is mean?
" Mean is defined as the ratio of the sum of all the given number to the total number of numbers. It is also known as average."
Formula used
Mean = [tex]\frac{Sum of all the given numbers}{Total number of numbers}[/tex]
According to the question,
Number of students = 10
Weekly allowances of each student
= $9, $11, $13, $15, $20, $10, $12, $15, $10, $15
Substitute the value in the formula of mean we get,
mean = [tex]\frac{9+11+12+13+20+2(10)+3(15)}{10}[/tex]
[tex]= \frac{130}{10}\\ \\= 13 dollars[/tex]
Hence, mean allowance of the given students is equals to $13.
Learn more about mean here
https://brainly.com/question/15662511
#SPJ2
I need help solving the equal method
Answer:
(-2, -4)
Step-by-step explanation:
Since both equations are equal to y, you can set them equal to each other:
[tex]\frac{3}{2}x-1=\frac{1}{2}x-3[/tex]
Next, solve for x:
[tex]\frac{3}{2}x-1=\frac{1}{2}x-3\\x-1=-3\\x=-2[/tex]
Finally, substitute the solution for x in one of the equations (or both) to find y:
[tex]y=\frac{3}{2}(-2)-1\\y=-3-1\\y=-4[/tex]
[tex]y=\frac{1}{2}(-2)-3\\y=-1-3\\y=-4[/tex]
Therefore, the solution to the system of equations is (-2, -4).
Here is a list of numbers:
20
29
30
33
37
40
41
46
50
Use four of the numbers to make a sequence and describe the rule
for continuing your sequence.
PLEASE HELP
Answer:
20,30,40,50
Step-by-step explanation:
I is going by my tens
Solve the system of equations. x = 4y + 3 4x - 16y= 12
Answer:
x=4y+3
Step-by-step explanation:
I don't know if this is right or not. Please tell me if it is.
What is the number of square units in the area of a triangle whose sides measure 5,5 and 6 units
Answer:
Meters, miles, feet, centimeters
Step-by-step explanation:
Please help!!!
A boat is pulled in by means of a winch located on a dock 10 feet above the deck of the boat. Let the angle of elevation ø = 18 degrees. Find the length s of the rope.
9514 1404 393
Answer:
32.4 feet
Step-by-step explanation:
The applicable relationship between angle and triangle lengths is ...
Sin = Opposite/Hypotenuse
The dock height is the side of the triangle opposite the given angle. The desired length is the hypotenuse of the triangle, so we have ...
sin(18°) = (10 ft)/s
s = (10 ft)/sin(18°) = (10/0.30902) ft
s ≈ 32.4 ft
The length of the rope is about 32.4 feet.
Last year, Charlie opened an investment account with $7200. At the end of the year, the amount in the account had decreased by 7%.
(2) Fill in the blank to write the year-end amount in terms of the original amount. Write
your answer as a decimal.
Year-end amount = 1 x Original amount
(0) Use your answer in part (a) to determine the year-end amount in Charlie's account.
Year-end amount: $
Answer:
649 dollars for charly poop
Pleaseeeee help me
ingore the answer i put
brainliest if right
Answer:
i think its -8
if its right yaaaa but if its worng sorry very sorry:(
What is the value of the expression 2 + x to the second power. 5
when x = 3? =
Answer:5x5 =20
Step-by-step explanation:
I think that 2+3=5
5 to the second power = 5 over 2
Which is 5x5
Which is equal to 20
A man buys a backpack from a sporting goods store. The backpack costs $20. Find the total cost of the backpack if he lives in a county with a 7.5% sales tax.
Answer: $21 and 50 cents
Step-by-step explanation:
what’s the answer? please help me on my geometry homework
Step-by-step explanation:
angle H=180-35-101=44
so arrow FG=2×44=88
The price of a can of green beans is raised from $0.50 to $0.60. What is the percent increase in the price of the can of green beans?
Answer:
20%
Step-by-step explanation:
Here, we want to calculate the percentage increase in the price of a can of green beans
Mathematically, we use the formula below;
(new price - old price)/old price * 100%
From the question;
old price = $0.50
new price = $0.60
So we have;
(0.6-0.5)/0.5 * 100%
= 0.1/0.5 * 100%
= 20%
A certain bacteria culture grows at a rate if 18% everday. There are currently 420 bacteria. How many bacteria will there be on day day 8
Answer:
1579
Step-by-step explanation:
There is a particular formula you must use and it leads to this 420(1 + 0.18)^8=1579
Pls help and show workings
SHOW WORKINGS!!!!
Answer:
X equals 5, that’s the answer
Step-by-step explanation:
Your local pizza store sells medium pizzas for $5.99 each, and breadsticks for $2.49 per order.
For a party, you decide to order 5 pizzas and 3 orders of breadsticks. There is a $4 delivery fee, and a 9.4%
sales tax will be added to the total. What will be the total bill after tax?
Answer: 42.82
Step-by-step explanation:
I really need help on this question. Thank you ! I’ll mark brainless correct answer.
Answer:
he gets $110 everytime he sells a copy
if he sells 0 copies, he will still have the $1,500 that's unaffected by the book
Step-by-step explanation:
I hope this helps :)
A transaction is positive if there is a sale and negative when there is a return. Each time a customer uses credit card for a transaction, the credit company charges Isabel. The credit company charges 1.5% of each sale and a fee of 0.5 % for returns
Full question:
A transaction is positive if there is a sale and negative when there is a return. Each time a customer uses credit card for a transaction, the credit company charges Isabel. The credit company charges 1.5% of each sale and a fee of 0.5 % for returns
Let x represent the amount of a transaction and let f(x) represent the amount Isabel is charged for the transaction. Write a function that expresses f(x)
Answer:
f(x)= 0.015(x)
f(x)= 0.005(x)
Explanation:
If Isabel makes a sale, she has a positive transaction and therefore is charged 1.5%(which is 0.015) by the credit company for the transaction. If the product is returned, it is a negative transaction and the credit company charges 0.5%(which is 0.005) for the transaction. The functions for positive and negative transactions would be different as indicated in the answer since transactions( given by x) are different- positive and negative.
Translate the sentence into an inequality.
The product of x and 3 is greater than 21
Answer:
3x>21
The product of 3 and x is 3x
greater than 21 is >21
What is an equation of the line that passes through the point (6,7) and is parallel to the line 2x-3y=92x−3y=9?
Answer:
y = ²/₃x + 3Step-by-step explanation:
y=m₁x+b₁ ║ y=m₂x+b₂ ⇔ m₁ = m₂
{Two lines are parallel if their slopes are equal}
Changing to slope-intercept form:
2x - 3y = 9 {subtract 2x from both sides}
-3y = -2x + 9 {divide both sides by (-3)}
y = ²/₃x - 3 ⇒ m₁=²/₃ ⇒ m₂=²/₃
The line y=²/₃x+b passes through point (6, 7) so the equation:
7 = ²/₃×6 + b is true
7 = 4 + b
b = 3
Therefore equation in slope-intercept form:
y = ²/₃x + 3
The equation of the line passing through the point (6, 7) parallel to the line is y = 2/3x + 3
The equation in slope - intercept form :
2x - 3y = 9
-3y = 9 - 2x
Divide both sides by - 3
y = - 3 + 2/3x
Using the points (6, 7)
7 = c + 2/3(6)
7 = c + 12/3
7 = c + 4
c = 7 - 4 = 3
c = 3
The equation of the parallel line is thus :
y = 2/3x + 3Learn more : https://brainly.com/question/18106342
{172-[125+(30÷2)×]}+5(8+3)
Answer:
is -15x+102 I belive. hope I helped!!! :D
I need help ASAP. I'm not good with math.
Given:
The increase in pressure P is the linear function of the depth d.
[tex]P(d)=0.445d+14.7[/tex]
The cost of dinner is $300 and $10 per students.
To find:
The initial value and rate of change and their interpretation.
Find the cost function C where n is the number of students.
Solution:
The slope intercept form of a linear function is
[tex]f(x)=mx+b[/tex] ...(i)
where, m is rate of change and b is y-intercept or initial value.
We have,
[tex]P(d)=0.445d+14.7[/tex] ...(ii)
From (i) and (ii), we get
[tex]m=0.445,b=14.7[/tex]
The initial value is 14.7. It means, the pressure at sea level is 14.7 pounds psi.
Rate of change is 0.445. It means, the pressure is increasing by 0.445 pounds psi for every feet.
The cost of dinner is $300 and $10 per students.
Let C(n) be the total cost for dinner and n be the number of students.
Fixed cost = $300
Additional cost for 1 student = $10
Additional cost for n student = $10n
Now,
Total cost = Fixed cost + Additional cost
[tex]C(n)=300+10n[/tex]
Therefore, the required cost function is [tex]C(n)=300+10n[/tex].
Evan can jog 1 1/3 miles in 1/4 hour. Part a find his average speed in miles per hour
Part B. Calculate how many miles he can jog in 3 hours
Answer: ↓↓↓
Step-by-step explanation:
Part A
1/4 × 4 = 1
1 1/3 × 4 = 5 [tex]\frac{1}{3}[/tex]
He jogs 5 [tex]\frac{1}{3}[/tex] per hour.
Part B
1 hr - 5 [tex]\frac{1}{3}[/tex] miles
3 hrs - 5 [tex]\frac{1}{3}[/tex] × 3
5 [tex]\frac{1}{3}[/tex] × 3 = 16
He jogs 16 miles in 3 hours
y/4= -19
what is y?
Find what y is
Answer:
y= -76
Step-by-step explanation:
y/4=-19
*4 *4
Help me please pass math
Answer:
Step-by-step explanation:
This question is a bit sloppy. In higher math courses it would not be permitted. I'll give you the general rule that applies to this question -- sort of.
If you have a triangle that hast angles of 100 50 and 30
The largest side will be opposite the 100 degree angle.
The smallest side will be opposite the 30 degree angle.
So for the question, you are intended to say that CD > AB because CD is opposite a 43 degree angle and AB is opposite a 40 degree angle.
So the answer is Since 43 > 40 then CD>AB