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Sloan [31]
3 years ago
7

Amanda receives money from her relatives every year on her birthday. Last year, she

Mathematics
1 answer:
umka21 [38]3 years ago
8 0

Answer:

We can call last years amount as 100 percent. that means 68-100. We want to know was 85 is so we can say 85-x. We have 68-100  

                                                                             85-x

Cross multiplying and solving for x we get 8500/68 =x  x=125, so the answer is 125.

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On Monday, I bought 1 dog and 3 cats for a total cost of $7.75. On Tuesday, 1
Zina [86]

Answer: The cats cost more

also there is a typo

Step-by-step explanation:

I bought 1 dog and 3 cats a total cost of $7.75. the three cats cost more so in all the cats must cost 3.56$

4 0
3 years ago
X + 7y = "70" 3x − 6y = −33 step by step
Aneli [31]

Answer:

x=7

y=9

Step-by-step explanation:

x+7y=70   ...(1)

3x-6y=-33

divide by 3

x-2y=-11   ...(2)

(1)-(2) gives

x+7y-x+2y=70+11

9y=81

y=9

x-2*9=-11

or x=-11+18=7

3 0
3 years ago
(4x5 + 9x3 - 12x8) + (8x3 - 7x + 2x5)
SSSSS [86.1K]

Answer:

-10x5 + 8x4 - 7x3 - 20x2 - x + 18

Step-by-step explanation:

8 0
3 years ago
Anita can clean a typical pool in 8 hours. Chao can clean a typical pool in 6 hours. How long should it take Anita and Chao work
ivanzaharov [21]
Anita can clean 1/8 portion of the pool in 1 hour

Chao can clean 1/6 portion of the pool in 1 hour

Both of them working together can clean 1/8 + 1/6 = 7/24 portion of the pool in 1 hour

Therefore, it will take both of the working together 1/(7/24) = 24/7 or 3 3/7 hours to clean a typical pool.
3 0
4 years ago
Select the property that is demonstrated by: 3 + 7 = 7 + 3 Group of answer choices Identity Property Associative Property Commut
cricket20 [7]

Answer:

The Commutative Property

Step-by-step explanation:

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