SOLVE PROPORTION
13. 5/n =16/32
14. 36/42=24/r
15. 9/10=d/6.4
16. x/8=3/12

13) n = 10

14) r = 28

15) d = 5.76

16) x = 2

Step-by-step explanation:

1)Solution by Proportion

Since the equation is an equality

If

16 ÷ 5 = 3.2

Then it is true that

32 ÷ x n = 3.2

Solving for n

n = 32 ÷ 3.2

n = 10

2) Since the equation is an equality

If

36 ÷ 24 = 1.5

Then it is true that

42 ÷ r = 1.5

Solving for r

r = 42 ÷ 1.5

r = 28

3)Since the equation is an equality

If

10 ÷ 6.4 = 1.5625

Then it is true that

9 ÷ d = 1.5625

Solving for d

d = 9 ÷ 1.5625

d = 5.76

4)Since the equation is an equality

If

12 ÷ 8 = 1.5

Then it is true that

3 ÷ x = 1.5

Solving for x

x = 3 ÷ 1.5

x = 2

U 2 can help me by marking as brainliest

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.