Answer:
(7,5)
Step-by-step explanation:
2(12 - y) + 3y = 29
24 - 2y + 3y = 29
24 + y = 29
y = 5
x = 12 - 5
x = 7
Answer:
The 8 bar soap is a better deal.
Step-by-step explanation:
Answer:
This one
Step-by-step explanation:
I don't have a picture, but this is what the graph would look like.
Answer:
4.9%
$6,150
Step-by-step explanation:
The interest rate on the loan, compounded continuously, is 4.9%. If they had taken an 8-year loan instead of a 5-year loan, they would have paid approximately $6,150 more.
Answer:
18. Sqrt40 goes between 6 and 7.
19. Sqrt83 ~= 9
Step-by-step explanation:
For both of these problems, it's really useful to be very familiar with the perfect squares on the times table. 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225...
On #18, we're looking at the sqrt40. This will be between sqrt36 and sqrt49, because 40 is between 36 and 49. But sqrt36 is 6 and sqrt49 is 7. So sqrt40 is between 6 and 7.
For #19, the sqrt83 is far closer to sqrt81 than it is to sqrt100. Sqrt81 = 9. So sqrt83 is very close to 9, it would round to 9 and not 10.