Ally is making a scale diagram of her classroom. She uses a scale factor of 3 centimeters per foot to draw the diagram. The actual length of the classroom is 18 feet, and its width is 20 feet. What is the area of the scale drawing of the classroom?

Answers

Answer 1

Answer: Multiply 18 * 3 and 20 * 3

18*3 = 54

20 * 3 = 60

Length = 54 cm ; Width = 60 cm

Area = L x W

54 * 60 = 3240

Area = 3240 cm

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Which fraction is equivalent to 0.5? A. 0/5

B. 5/10

C. 5/100

D. 2/1

Answers

B. 5/10 is equivalent to 0.5

B, 5/10=1/2=0,5
So 0,5 is equal to 5/10

What is the reason for each step in the solution of the equation? 18−2x=4x

Answers

In order to solve an equation for a certain variable, you should isolate that variable on one side of the equation and leave all the other terms on the other side on the equation.
The, you solve to get the value of the variable.

The equation we have here is:
18−2x=4x
First, we need to isolate the terms containing the "x" on one side of the equation. To do this, we will add 2x to both sides of the equation:
18−2x+2x=4x+2x
18 = 6x
Now, we need to get the value of the "x". To do this, we will simply divide both sides of the equation by 6:
18/6 = 6x/6
3 = x .............> This is the solution of the equation

You want to get all the x's on one side of the equation so add 2x to both sides of the equation. 4x + 2x = 6x. now you want to get the x by itself so dived both sides of the equation by 6. 18 = 6x, 18/6 = x, x = 3

There were 2.4 cups of water in Barkley's waterdish. He drank 1.33 cups. How much water is still in
the water dish?

Answers

Answer:

1.07

Step-by-step explanation:

Five less than twice a number is 7

Answers

Make the number a variable x and make an equation
2x-5=7
Then solve
2x=12
x=6
Hope this helps.

5 less than twice a number is 7Is 6.Answer =6

18+(-12)+5 add integers

Answers

The answer to this question is 11.

11 because 18-12=6 and 6+5=11

Which relation is a function?

Answers

As given in the question,

the relations A , B ,C and D are set up as a table of ordered pairs.

We now test to see if each element in the domain(x-values) is matched with exactly one element in the range(y-values). If so, you have a function!

A is not a function as the domain value 0 is paired with both 3 and 4.

B is a function as for each input there is exactly one output.

C is not a function as the domain value 2 is paired with both 1 and 8.

A is not a function as the domain value 1 is paired with both -3 and 2.

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