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3 years ago

9 decreased by x and y

Mathematics

2 answers:

Law Incorporation [45]3 years ago

6 0

9 - (x + y)

i could tell you more but i dont know the value of x and y

Gnom [1K]3 years ago

4 0

Answer:

9-(x+y)

Step-by-step explanation:

9 would be before x and y for the equation bc it states 9 first

when it says x and y, it means that you add so x+y but you have to put in parentheses bc you have to find the value of x and y first

so lets say, for example, 9 decreased by x and y, x=3 and y=2

so the equation is 9-(x+y)

so then the new equation would be 9-(3+2)

so then 3+2 is 5 so you subtract 5 from 9 which would be 4

hope this helps

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The length of one side of a square is (x + 2 1/4). If the perimeter is 14 units, what is the area?

Stels [109]

The perimeter is the total of adding all of the side lengths together.

A square has 4 equal side lengths.

So the perimeter of a square is:

P = s + s + s + s or P = 4s

[P = perimeter s = side lengths of the square]

Since you know the side length of the square is (x + 2 1/4), you can replace s with (x + 2 1/4)

P = 4s

P = 4(x + 2 1/4) Multiply 4 into (x + 2 1/4)

P = 4x + 8 4/4

P = 4x + 9

Since you know the perimeter, you can plug it in.(you could have also plugged it in in the beginning)

P = 4x + 9

14 = 4x + 9 Subtract 9 on both sides

5 = 4x Divide 4 on both sides

5/4 = x

Now that you know x, find the side length of the square.

(x + 2 1/4)

(5/4 + 2 1/4)

2 6/4 = 3 2/4 = 3 1/2 units or 3.5 units

To find the area of a square, you multiply 2 of the sides together:

A = s · s

A = 3.5 · 3.5

A = 12.25 units²

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2 years ago

7. The amount of memory on a CD determines how many songs I can download to it.<br> Indep.<br> Dep.

galina1969 [7]

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jekas [21]

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