Ne tried to evaluate an expression. Here is her work: 10 - 4 + 2(4)
= 10 - 4 + 8?
Step 1
Time
elapse
= 10 - 4 + 64
Step 2
8.
00
= 6 + 64
Step 3
SmartSc
out of 100
= 70
Step 4
Is Justine's work correct?
30
No, Justine made a mistake going from the given expression to Step 1.
Justine should have squared 4 before multiplying. The order of operations
says to evaluate exponents before you multiply.
No, Justine made a mistake going from Step 2 to Step 3. Justine should have
added before she subtracted. The order of operations says to add before you
subtract.
Yes, Justine's work is correct.

Jubal wrote the four equations below. he examined them, without solving them, to determine which equation has no solution. which of jubal’s equations has no solution hurry

If p(x) is the total value of the production when there are x workers in a plant, then the average productivity of the workforce at the plant is a(x) = p(x) x . (a) find a'(x). a'(x) = xp'(x) − p(x) x a'(x) = xp'(x) − p(x) x2 a'(x) = p'(x) − p(x) x a'(x) = xp'(x) − p'(x) x2 a'(x) = p'(x) − xp(x) x2 why does the company want to hire more workers if a'(x) > 0? a'(x) > 0 ⇒ a(x) is ; that is, the average productivity as the size of the workforce increases. (b) if p'(x) is greater than the average productivity, which of the following must be true? p'(x) − xp(x) > 0 p'(x) − xp(x) < 0 xp'(x) − p'(x) > 0 xp'(x) − p(x) < 0 xp'(x) − p(x) > 0

The dimension of the rectangular pool shown below are 40 yards by 20 yards