Answer:
2.125
Step-by-step explanation:
LIbrary noise = 40 decibels
traffic noise = 85 decibels
how many does 40 take to make 85? = X
40X=85
X=85/40
2.125
here is 93 points but answer this please If x = 4, what is the value of x3 + x - 5?
Answer:
11
Step-by-step explanation:
x3+x-5
3*4=12
12+4-5
16-5=11
pls i REALLY need brainliest
A.150 feet
B.200 feet
C.250 feet
D.100 feet
Question and answer choices are attached. Please pick the right answer and explain/show work if possible. Thanks!
Answer:
Choice c. [tex]\sqrt{12}[/tex]
Step-by-step explanation:
Vectors
Suppose we have a vector v defined as
[tex]\vec v=a\mathvf{i}+b\mathvf{j}[/tex]
The magnitude of the vector is:
[tex]\mid\mid\vec v\mid\mid=\sqrt{a^2+b^2}[/tex]
On the other hand, the dot product of the vector by itself is:
[tex]\vec v\cdot\vec v=a*a+b*b=a^2+b^2[/tex]
Note the relation between these two operations is:
[tex]\mid\mid\vec v\mid\mid=\sqrt{\vec v\cdot\vec v}[/tex]
Since we are given:
[tex]\vec v\cdot\vec v=12[/tex], then:
[tex]\mid\mid\vec v\mid\mid=\sqrt{12}[/tex]
Choice c) [tex]\sqrt{12}[/tex]
Which set of angles can form a triangle?
A. 1 acute, 1 right, and 1 obtuse
B. 1 acute and 2 right
C. 1 acute and 2 obtuse
D. 2 acute and 1 right
I need helppp
Answer:
D can form a right angle triangle.
Step-by-step explanation:
Answer:
I don't know
Step-by-step explanation:
but thanks for the points
Awnser pls.........................................
Becca made 960 cookies to sell. She wants to package the cookies in the the boxes of 16 . Her goal is to make $630 from selling her cookies . If each box of cookies is priced the same , how much should Becca charge for each box ?
Step-by-step explanation:
Total cookies = 960
Each box has 16 cookies
Her goal is $630
First, you want to find out how many boxes she made
960÷ 16 = 60
She made 60 boxes
Now you want to find the price for each box
630 ÷ 60 = 10.5
She should charge $10.50 for each box
I hope this helps!!!
what's 4 ÷ 9 and 9 ÷ 4 write each quotient as either a fraction or mixed number help me
how do I find 2/3 of 12 slices of pizza eaten
Multiply 12 slices by 2/3:
12 x 2/3 = (12 x 2) /3 = 24/3 = 8
The answer is 8
Answer:
8
Step-by-step explanation:
12/3 = 4
4*2=8
Xavier is half as old as Jessica. The sum of their ages is 63. How old is Jessica? (
Answer:
31.5
Step-by-step explanation:
Answer:
let their age be x and y
x=y.......1st equation
2
now,
product of their age
x+y=63
y +y=63 (putting the value of x=y/2)
2
3y =126
y=126
3
y=42
hence,
age of jessica is y =42.
Secured debt usually has _____.
longer loan terms
collateral
lower interest rates
all of the above
Answer:
all of the above
Step-by-step explanation:
Please HELP (due after 20 mins)
Order from least to greatest:
-2, 3.5, 2.25, -3.5, 1
A large pizza at a restaurant has the dimensions shown. Find the area of the pizza. Use4 for T. 14 in. 22 Why does it make sense to use as the estimate for T? Explain your reasoning. PLEASE HELP
Darron is taking college classes while in high school. The classes cost $200 plus $35 for every credit hour. y = total cost of classes x = credit hours taken Which equation matches this linear function?
Answer:
y = 35x+200
Step-by-step explanation:
The $200 is a constant, and the $35 PER credit hour makes it dependent on x.
Write the following inequality in slope-intercept form: 4x – 2y < 10
Answer:
y>2x-5
Step-by-step explanation:
-2y+4x<10
-2y<10-4x
divide by -2 to isolate the y
y>-5+2x
Since we are dividing by a negative the sign flips.
Our final answer is y>2x-5
What is the approximate circumference of a circle that has a radius of 10 centimeters? (Use 3.14 for ). C=__ cm
Answer:
C = 62.8 cm
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightGeometry
Circumference Formula: C = 2πrStep-by-step explanation:
Step 1: Define
r = 10 cm
Step 2: Find C
Substitute [CF]: C = 2π(10 cm)Multiply: C = 20π cmMultiply: C = 62.8 cmAnswer:
62.8
Step-by-step explanation:
Radius is 10, so the diameter is 20 (10x2)
20 x 3.14(pi)= 62.8
Rainer bought 1.5 pounds of lunch meat at the store for $10.98. What was the unit rate (price) of the lunch meat?
Answer:
7.32
Step-by-step explanation:
Answer:
7.32
Step-by-step explanation:
To find the unit rate, divide 10.98 by 1.5 to get 7.32
What is the y-intercept of a line that has a slope of —3 and passes through point (0, -7)?
_7
-3
0
4
Answer:
-7
Step-by-step explanation:
well, y-intercept is value of y when x = 0.
from the problem, we already have the answer, it is -7
but more detailed way is
m = -3
[tex] \frac{y - ( - 7)}{x - 0} = - 3 \\ y - ( - 7) = - 3x \\ y = - 3x - 7 \\ [/tex]
y-intercept is value of y when x = 0
[tex]y = - 3(0) - 7 \\ y = - 7[/tex]
Round to the nearest whole number: 123.45
Answer:
123
Step-by-step explanation:
because if its lower than 50 you round down, if its 50 or above you round up
Answer:
If you like to round 123.45 to the nearest tenth, leaving only one number after the decimal point, then you have come to the right post. Number:.
Step-by-step explanation:
Solve this equation for x.
5(1+3x)−9=4(3x−3)
x=−83
x=−19
x=23
x=89
Sam knows that he can read 17 pages of his book in 30 minutes he needs to finish his book in 1 1/2 hours will he be able to finish his book in time if he still needs to read 50 more pages
Answer:
Yes
Step-by-step explanation:
17 pages in 30 minutes is 51 pages in 90 minutes. He needs 50 more pages in 90 minutes so he will be able to finish his book.
I hope this answer helped, and if it was correct, please mark this as brainliest! Thank you!
Olivia is going to invest $32,000 and leave it in an account for 15 years. Assuming the interest is compounded monthly, what interest rate, to the nearest hundredth of a percent, would be required in order for Olivia to end up with $80,000?
Answer:
6.12
Step-by-step explanation:
8x - 2(x - 5) = x + 25
A.
x= 3
B.
X= 4
C.
x = 6
D. X= 7
Answer:
A
Step-by-step explanation:
8x-2x+10=x+25
6x+10= x +25
6x-x=25-10
5x=15
x=3
Sum of the radius of the base and height of a cylinder is 21 cm and the curved surface area of the cylinder is 616 sq.cm,find the total surface area of the cylinder.
PLEASE HELP ME AS FAST AS POSSIBLE
Step-by-step explanation:
lets radius be r and height be h,
r+h=21 -----(1)
curved surface area
2×pi×r×h=616 -----(2)
use simultaneous eqn to solve for r and h.
total surface area of cylinder= 2×pi×r×h + 2×pi×r²
= ans if im not wrong
7th grade math help me please
Answer:
27-t times 3
27- 6 times 3
27-18
9
Dave typed the first 8 pages of his report in 24 minutes. At this rate, how long should it take Dave to finish typing the rest of his 60 pages report ?
Answer
180
Step By Step Explanation
24/8 = 3, 3x60=180
Bo Karah can run a race in 4 hours 33 minutes if he runs at 7 m/s. How long will it take in hours and minutes if
he runs at 11 m/s? Give your answer to the nearest minute.
Answer:
7 hours and 9 minutes
Step-by-step explanation:
4 hours and 33 minutes is 273 minutes
7 m/s —> 273 minutes
11 m/s —> M
Criss cross to get M
11x273= 7M
3003=7M
M=429 minutes
==> 429 minutes is 7 hours and 9 minutes
you roll a single die numbered from 1 to 6 twice. what is the probability of rolling a 6 the first time and an odd number second
Answer:
1/12
Step-by-step explanation:
Since the two rolls are independent, then the chance of getting a 6 in the first and an odd number in the second is obtained by multiplying the two probabilities.
1/6 is the probability of rolling 6, 1/2 is the probability of rolling an odd number
1/6 times 1/2 is 1/12
2. PLZZZ help math (O_O)
U don’t have to answer them all but at least answer one question if u answer make sure to member them so I know which one is which.
Answer:
1) 3
2) 26
3) 50
4) 20
5)20
Step-by-step explanation:
4. A line with a slope of -2 passes
through the point (3,-1). Which of
the following is the equation of
the line?
O y = 3x – 2
O y= -4x – 2
O y = -2x + 5
O y=-2x + 1
Answer:
y=-2x+5..…...........
(2 to the power -1 ÷ 5 to the power- 1)2 × -5/8 to the power -1
Answer:
-8
Step-by-step explanation
2 to the power of -1 = 0.5
5 to the power of -1 = 0.2
0.5/0.2 = 2.5
So,
(2.5)2 x -5/8 to the power of -1
-5/8 = -0.625
-0.625 to the power of -1 = -1.6
So,
(2.5)2 x -0.625
5 x -0.625
= -8
Answer:
-8
Step-by-step explanation:
(2^-1 ÷ 5^-1) = 5/2
(5/2) x 2 = 10/2 or 5
-5/8 ^-1 = - 8/5
5 x - 8/5 = -40/5 or -8
Hope its helpful ☺️