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3 years ago

How do you get 25% of what number is 21

1 answer:

7 0

So the question is 25% of what number is 21. Lets turn that into an equation: let x be the number we are looking for. We need to take 25% from it and we know that that is equal to 21. Mathematically: 25% * x= 21. Or: (25/100) * x = 21. When we multiply both sides with 100 and divide both sides by 25 we get: x=21*(100/25). And we get that x=84.

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The sum of 12 and the quantity 8 times a number k is equal to 48

Rudiy27

12+8k=48
=>8k=36
=>k=36/8
=>k=4.5

6 0

3 years ago

what is the slope of the line that passes through the points (-3,1) and( 7,-14)? write your answer in simplest from.

Harrizon [31]

Answer:

slope = m = (0--3)/(14--4) = 3/18 = 1/6

y=mx + b

y =(1/6)x + b

0= (1/6)14 + b

b = - 14/6 = - 7/3

y = (1/6)x - 7/3

6y-x = -14

Step-by-step explanation:

3 0

3 years ago

Challenge Yael used to have a square garage with 370 ft ^2of floor space. She recently built an

Yuki888 [10]

Scale factor of area is the square of the scale factor of length

The required values are;

The length of one sides of the garage was originally approximately 19.2 ft.

The length of one of the sides of the garage is now approximately 23.6 feet long

The percentage increase in length is approximately 22.5 %

Reason:

The given parameters are;

The area of the square garage = 370 ft.²

The area of the new garage has 50% more space

Required;

Part A

The initial side length

The initial side length, given to the nearest tenth, s, is the square root of the area, A, given as follows;

s = √(370 ft.²) ≈ 19.2 ft.

Part B

The side was increased by 50%, to give,

370 + 0.5×370 = 555

The new area of the garage = 555 ft.²

The side length of the new garage, s = √(555) ≈ 23.6

The side of the garage now is 23.6 ft.

Part C

The percentage increase is given as follows;

$The \ percentage \ increase \ in \ length = \dfrac{New \ length - Initial \ length}{Initial \ length }$

$The \ percentage \ increase \ in \ length = \dfrac{\sqrt{555} - \sqrt{370} }{\sqrt{370} } \times 100 \approx 22.5 \%$

The percentage increase in length of the side of the garage is approximately 22.5 %

Learn more here:

brainly.com/question/7639412

3 0

3 years ago

What is 4x+5+5x9+9+9(3+5)-10x20

dlinn [17]

Answer:

yes

Step-by-step explanation:

3 0

3 years ago

Please help 9.4c−1.01*(22b−5.2c)+b

Masteriza [31]

Answer:

14.652c-21.22b

Step-by-step explanation:

multiply parentheses by -1.01

9.4c-22.22b+5.252c+b

collect like terms

14.652c-21.22b

8 0

4 years ago

Read 2 more answers