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Help help math math math

Help help math math math-example-1
User Zahory
by
7.7k points

2 Answers

10 votes

Answer:


\huge\boxed{\boxed{N=3}}

Explanation:

Hello.

We have the proportion


\displaystyle(28)/(4) =(21)/(N)

In order to solve a proportion, we should cross-multiply:

28×N=4×21

28N=84

Divide both sides by 28.

N=3

And we're done!

I hope it helps & have an outstanding day!

~ST2710 :)

User Lukas Ruge
by
7.9k points
12 votes

Explanation:

your teacher wrote most of the solution in this picture.

all we need to do is simplify and transform the equation

28/4 = 21/N

7 = 21/N

7N = 21

N = 21/7 = 3

formally, the ratio of corresponding (side) lengths is the same for all corresponding sides or other lines (like heights) in similar shapes.

so, the rate 28/4 = 7/1 = 7 asked also to 21 and N.

28/7 = 4

and

21/7 = N = 3

User Slaven Rezic
by
7.8k points

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