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kramer
3 years ago
11

Use algebra tiles to find (8x2+4)-(8x2+2)

Mathematics
1 answer:
vfiekz [6]3 years ago
5 0

Answer:

2

Step-by-step explanation:

(8x^2+4)-(8x^2+2)

8x^2+4-8x^2-2

4-2

2

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A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is
Dennis_Churaev [7]

Answer:

The test contains 10 three-point questions and 14 five-point questions

Step-by-step explanation:

Given equations are:

x+y = 24\\and\\3x+5y=100

From 2nd equation we can deduce that x represents number of 3-point questions and y represents number of 5-point questions.

Using the substitution method:

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y= 24-x

Putting this valu of y in 3x+5y=100

3x+5(24-x) = 100\\3x + 120 - 5x = 100\\-2x+120=100\\-2x = 100-120\\-2x = -20\\\frac{-2x}{-2} = \frac{-20}{-2}\\ x = 10\\Putting\ the\ value\ of\ x\ in\ x+y=24\\10+y=24\\y = 24-10\\y = 14

Hence, the correct answer is:

The test contains 10 three-point questions and 14 five-point questions..

8 0
4 years ago
Solve for x<br> Solve for x
hichkok12 [17]

Answer:

23.1

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14/20*x/33

Cross multiply

14*33=20*x

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Hope this helps :)

5 0
3 years ago
Read 2 more answers
Mr. Ramirez purchased 20 concert tickets for a total of $225. The concert tickets cost $15 for adults and $10 for children under
sveticcg [70]

Answer:

$225 = $15 a + $ 10 c

Step-by-step explanation:

Given,

Total price = $225

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System of equation to represent scenario

a is variable for adult

c is variable for children

Now,

Total price =  $15 a + $ 10 c

$225 = $15 a + $ 10 c

5 0
4 years ago
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