Question

There is a step missing from the solution below. Which equation is the missing step?

P=17-√0.025x+7
25=17-√0.025x+7
8=-√0.025x+7
?
57=0.025x
2280= x

A. 64=0.025x+49
B. 8=0.025x+7
C. -8= √0.025x+7
D. 64=0.025x+7

Answer 1

Answer: 64=0.025x+7

Explanation:

a p e x

Answer 2

option: D is the correct answer.

( D. 64=0.025 x+7 )

Explanation:

We are given step as:

`P=17-√(0.025x+7)\\\\25=17-√(0.025x+7)\\\\8=-√(0.025x+7)------(1)`

?

57=0.025x

-----------(2)

2280= x.

We are asked to find the missing step.

Clearly after equation (1)

They have squared the equation both side to obtain:

`64=0.025x+7`

and then they took the constant term to the left hand side to obtain equation (2).

`64-7=0.025x\\\\57=0.025x`

Hence, the correct option is:

Option: D

D. 64=0.025 x+7