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exis [7]
3 years ago
7

Can someone explain to me how to solve this question?

Mathematics
1 answer:
adoni [48]3 years ago
4 0

Answer:

1) D

2) C

Step-by-step explanation:

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Help me plz i have 3 question 30 points
Vlad1618 [11]
Here're the answers!!! Good luck!!
1) a = -7 (The first picture -Left to right)
2) x = -39
3) a = -2.1 (The last picture left to right)


Hoping this helped you out!! If my answer best helped you, please mark Brainliest! ;)

3 0
3 years ago
A music store sells used cds for $5 each and buys used CDs for$1.50 each. you go to the store with $20 and some CDs to sell. you
olya-2409 [2.1K]
Let x be the number of CDs we buy and y the number of CDs we sell. 
Each CD sell for $1.5, then the total of money we earn is $1.5y.
Each CD bought for $5, then the total money spent is $-5x
Add the above values like this:
1.5y-5x
We have $20, add them like this:
1.5y-5x+20
Since we want to have<span> at least $10 left when you leave the store, then 
we deduce the equation:
</span>1.5y-5x+20\leq 10
5 0
3 years ago
When x=2 and y=4, by how much does the value of 4x^2 - y exceed the value of 3x^2 - 3y​
kakasveta [241]

Step-by-step explanation:

4(2)² - 4 =

4(4) - 4 = 12

3(2)² - 3(4)

3(4) - 12

12 - 12 = 0.

It exceeds the value by 12 :)

6 0
2 years ago
What is the sale tax of a $178.90 chair with a 24% markup.
serious [3.7K]
178.90x.24=42.94<---- sales tax


6 0
3 years ago
Set up a proportion and solve each problem. Round each answer to the nearest tenths. 5) What is 35% of 74? 6) 78 is what percent
prisoha [69]

Answer:

5)  35 / 100 = X / 74      X = 2590 / 100 = 25.9

or .35 * 74 = 25.9

6) 78 / 95 = X * 100

X = 7800 / 95 = 82.1 %

or X = 78/95 * 100 = 82.1 %

7)  60/100 * X = 28

X = 2800 / 60 = 46.7

Or .6 * X = 28

X = .28 / .6 = 46.7

8 0
2 years ago
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