Question

When –3 is multiplied by the sum of a number and 8, the result is –21. Find the number.

Answer 1

-3(x + 8) = -21 -- distribute through the parenthesis
-3x - 24 = -21 -- add 24 to each side
-3x = -21 + 24
-3x = 3 -- divide by -3
x = -1

Answer 2

any questions ?

Answer 3

yes

Answer 4

Meg opened a savings account with $44.50. She puts in $22.25 in the account each week when she gets paid. She is saving to purchase a blu-ray player that costs $178.00. How many weeks will it take her to save enough money?

A.
6 weeks
B.
7 weeks
C.
8 weeks
D.
9 weeks

Answer 5

44.5 + 22.25w = 178

can you do this ? Just solve for w , the number of weeks.

Answer 6

are you having problems ?

Answer 7

yea

Answer 8

thats 8 weeks??

Answer 9

hold on..let me check

Answer 10

lets sub your answer in and see if it is true

44.5 + 22.25(8) = 178
44.5 + 178 = 178
that is not correct

44.5 + 22.25w = 178
subtract 44.5 from both sides to get 22.25w by itself
what do you get from that ?

Answer 11

9 week then

Answer 12

44.5 - 44.5 + 22.25w = 178 - 44.5
you see how the 44.5's will cancel each other out on the left side
now combine like terms
22.25w = 133.5

do you understand so far ?

Answer 13

22.25w = 133.5
now divide both sides by 22.25 to get w by itself
22.25w/22.25 = 133.5/22.25
now what do you get ?

Answer 14

6

Answer 15

lol thanks

Answer 16

i got another question

Answer 17

check it..
44.5 + 22.25(6) = 178
44.5 + 133.50 = 178
178 = 178 (correct)

answer is 6 weeks

Answer 18

can u help me out?

Answer 19

possibly...what you got ?

Answer 20

When modeling word problems as mathematical equations, which of the following is a synonym for the division operation?

A.
difference
B.
decreased
C.
per
D.
combined

Answer 21

i think its C but im not sure

Answer 22

synonym means the same, right ?

Answer 23

yea

Answer 24

well..not sure...none of them make sense
I know it is not decreased or difference....combined means addition....so I guess it is per.

Answer 25

difference is subtraction, decreased is subtraction, combined is addition, and "percent" means "per 100" and represents dividing by 100

Answer 26

your right....it is per

Answer 27

you need anymore help ?

Answer 28

im fine thanks