Aproblem states that ursula earns $9 per hour. to write an expression that tells how much money ursula earns for h hours, joshua wrote 9/h sara wrote 9h. whose expressions is crrect and whu

Here, h represents the hours.

As per the statement:

Ursula earns $9 per hour.

In 1 hour Ursula earns = $9

then;

in h hours Ursula earn  = 9h

Therefore, an expression which tells that 9h money Ursula earns for h hours.

Sarah expression 9h is correct.

Because it tells how much money she earns each hours.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.