Ms. Thayer bought 6 items for her physics class at a mean cost of $8.40 per item. When she added a dial caliper for $46.50 to her purchases, the new mean for all 7 items became about A. $16.15
B. $7.84
C. $13.84
D. $54.90
E. $27.45

Explain your thinking.

50- 250 is correct i did that one too

step-by-step explanation:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation: