Becca tried to evaluate the expression 45 - (8\times3 + 15)45−(8×3+15)45, minus, left parenthesis, 8, times, 3, plus, 15, right parenthesis. Her work is below 45 - (8 times 3 + 15) 45 - (24 + 15) 45 - 39 =45−(8×3+15) =45−(24+15) =45−39 =16 In which step did Becca first make a mistake?

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

answer: answer: d) v= 1/6 bh  

step-by-step explanation:

since according to the given question,   a pyramid is placed inside a prism.

step-by-step explanation: