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3 years ago

3(7)+9=30 what does this equal

Mathematics

2 answers:

gayaneshka [121]3 years ago

6 0

Answer:

First finish the brackets

21+9=30

30=30

So, it’s true

Step-by-step explanation:

icang [17]3 years ago

6 0

Answer:

you got the right answer it equals 30

Step-by-step explanation:

i think that is what your asking and the answer is already correct

but you distribute the 3 into the 7 so you would do 3x7+9 and that would give you 30

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Answer:

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Step-by-step explanation:

The complete question is

If the perimeter of a rectangle is 22 meters, and the perimeter of a right triangle is 12 meters (the sides of the triangle are half the length of the rectangle, the width of the rectangle, and the hypotenuse is 5 meters). How do you solve for L and W, the dimensions of the rectangle.

step 1

Perimeter of rectangle

we know that

The perimeter of rectangle is equal to

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we have

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$22=2(L+W)$

Simplify

$11=L+W$ -----> equation A

step 2

Perimeter of triangle

The perimeter of triangle is equal to

$P=\frac{L}{2}+W+5$

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$12=\frac{L}{2}+W+5$

Multiply by 2 both sides

$24=L+2W+10$

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Solve the system of equations by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (8,3)

see the attached figure

therefore

The dimensions of the rectangle are

Length:8 m

Width:3 m

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Step-by-step explanation:

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