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svet-max [94.6K]
3 years ago
8

-7x^2+14x+21=0answer?​

Mathematics
1 answer:
scoray [572]3 years ago
6 0

Answer:

7(−x−1)(x−3)

Step-by-step explanation:

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I’ll give you 20 points if you help me
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Answer:

  f(g(x)) = 2x +(-5)

Step-by-step explanation:

Put the argument value into the function and simplify the result.

  f(g(x)) = f(x -3) = 2(x- 3) +1 = 2x -6 +1

  f(g(x)) = 2x +(-5)

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2 years ago
Given the ratio of 6 feet:72 inches, how many inches are equivalent to 3 feet
irina1246 [14]

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36 inches

Step-by-step explanation:

6 feet equals 72 inches. 6 divided by 2 is 3 so you do 72 divided by 2. 72 divided by 2 is 36 inches.

Hope this helps :)

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2 years ago
Arjun's piggy bank contains two kinds of coins and two kinds of bills. there are twice as many $1 bills like $5 bills. the numbe
olga55 [171]

Answer:

  • $5 bills x 5, $1 bills x 10, quarters x 16, dimes x 9

Step-by-step explanation:

  • $5 bills = x, total = 5x
  • $1 bills = 2x, total = x
  • Quarters = 3x + 1, total = 0.25(3x + 1)
  • Dimes = 3x + 1 - 7= 3x - 6, total = 0.1(3x - 6)

<u>Equation below as the sum, solve for x:</u>

  • 5x + 2x + 0.25(3x + 1) + 0.1(3x - 6) = 39.9
  • 7x + 0.75x + 0.25 + 0.3x - 0.6 = 39.9
  • 8.05x  - 0.35 = 39.9
  • 8.05x = 40.25
  • x = 40.25/8.05
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<u>Number of each bill and coin:</u>

  • $5 bills = 5
  • $1 bills = 2*5 = 10
  • Quarters = 3*5 + 1 = 16
  • Dimes = 3*5 - 6 = 9
8 0
3 years ago
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x/8-11=15

Quotient means to divide. So, the question is asking you to divide a number and 8. Then, subtract it from 8 to get the answer 15.

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Step-by-step explanation:

B is the correct answer because x is 2 and if 2 is a then both x and a equal 2

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