All categories

4 years ago

I need help with this:(

Mathematics

1 answer:

Fudgin [204]4 years ago

6 0

Answer:

94%

Step-by-step explanation:

The whole thing is about averages. Currently the average an 87%, because 85+91+86 = 262. 262/3 = roughly 87%.

Now if she got another score, that would mean it would now be divided by 4 instead of 3. So the equation is:

(262+x)/4 = 89

*4 *4

____________

262 + x = 356

-262 -262

____________

x = 94

You might be interested in

The floor of a rectangular deck has an area of 600 square feet. The floor is 20 feet wide. How long is the floor? A. 30 ft. B. 2

svetoff [14.1K]

A. 30 ft
The formula for the area of a rectangle is width x length = area. Knowing this formula, we can solve for the length by dividing the area by the width. 600 divided by 20 is 30.

4 0

3 years ago

Read 2 more answers

What is 1 tenth of 3.0. as a decimal

tangare [24]

Answer=0.3

1/10 of 3.0 is 0.3

3.0*(1/10)=0.3

4 0

3 years ago

You are resurfacing your backyard pool. The pool is in the shape of a rectangular prism with a length of 20 ft, a width of 10 ft

zepelin [54]

Answer:

$440\ ft^2$

Step-by-step explanation:

we know that

The area of the backyard pool to be resurfaced is equal to the area of the base plus the area of its four lateral sides.

$A=B+PH$

where

B is the area of the base

P is the perimeter of the base

H is the depth of the pool

Find the area of the base B

$B=(L)(W)$

substitute the given values

$B=(20)(10)=200\ ft^2$

Find the perimeter of the base P

$P=2(L+W)$

substitute the given values

$P=2(20+10)=60\ ft$

we have

$H=4\ ft$

Find the area of the backyard pool to be resurfaced

$A=B+PH$

substitute the values

$A=200+60(4)$

$A=440\ ft^2$

3 0

3 years ago

How do you solve it A(x+b)-c=d

Vsevolod [243]

Move all the terms to the left side and set equal to zero. Then set each factor equal to zero.

A= c+d/b+d

5 0

4 years ago

The side length of a square is:

Licemer1 [7]

Answer:

Basic fact:

all sides of a square are equal

Step-by-step explanation:

1 side is x+1 so all sides are x+1

there are 4 sides so times everything by 4

4(x+1) which is 4x+4

5 0

2 years ago