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Vlad [161]
3 years ago
10

I need help with this please

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
5 0

Answer:i can's see it very well sorry kid

12

Step-by-step explanation:i dont know

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X = -2y + 300 3y = 800 - 4x
devlian [24]

Answer:

<h2>x = 140, y = 80</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x=-2y+300&(1)\\3y=800-4x&(2)\end{array}\right\\\\\text{Substitute (1) to (2):}\\\\3y=800-4(-2y+300)\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\3y=800+(-4)(-2y)+(-4)(300)\\\\3y=800+8y-1200\\\\3y=8y-400\qquad\text{subtract}\ 8y\ \text{from both sides}\\\\-5y=-400\qquad\text{divide both sides by (-5)}\\\\y=80\\\\\text{Put it to (1):}\\\\x=-2(80)+300\\\\x=-160+300\\\\x=140

8 0
3 years ago
Read 2 more answers
Onna received a $80 gift card for a coffee store. She used it in buying some coffee that cost $8.09 per pound. After buying the
mario62 [17]

Answer:

She bought 5 pounds

Step-by-step explanation:

Original worth of gift card = $80

Balance on card after purchase = $39.55

Amount used for purchase = 80 - 39.55 = $40.45

Next let us determine how many pounds of coffee she bought as follows:

Price of coffee = $8.09 per pound

amount spent on coffee = $40.45

Lett the number of pounds of coffee she bought be x

$ 8.09 = 1 pound

$40.45 = x pounds

since $8.09 = 1 pound

\$\ 1 = \frac{1}{8.09}\ pounds

\$\ 40.45 = 40.45 \times\ \frac{1}{8.09} \\= \frac{40.45}{8.09}\\ = 5\ pounds

5 0
3 years ago
7.29 . 7.57= can y'all help me?
Sveta_85 [38]

Answer:Answer:8900274878944444442790579275839469827389,0000008888887984578145

Step-by-step explanation: If you divide and multiply stuff you get 859889568954 then you multiply 265564882398758455 by 2336935 and get 827598273948798277869000758672837409722894772983466023408927398578423364590985237777777779

Step-by-step explanation:

7 0
3 years ago
A3 + 3a2b - 4ab - 11b + 7?
Thepotemich [5.8K]
Hello!

Are you looking for how many "Terms" there are?

If so, then there would be: 5 terms, which are:

a³
3a²b
-4ab
-11b
7

I Hope my answer has come to your Help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead! :)
8 0
3 years ago
Od
bearhunter [10]

Answer:

38 women

Step-by-step explanation:

Question 9 (1 point)

In the middle school PTA there is a total of 47 men and women. The number of women the PTA is 2 more than four times the number of men. How many women are in the

PTA?

Let the number of men = x

Let the number of women = y

x + y = 47

y = 2 + 4x

We substitute

x + 2 + 4x = 47

Collect like terms

5x = 47 - 2

5x = 45

x = 45/5 = 9

y = 2 + 4x

y = 2 + 4 × 9

y = 2 + 36

y = 38

Therefore, the number of women = y = 38 women

5 0
2 years ago
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