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Alika [10]
3 years ago
5

Write the quadratic function f(x) = 3(x + 1)(x – 7) in standard form.

Mathematics
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer:

B

Step-by-step explanation:

Given

f(x) = 3(x + 1)(x - 7) ← expand the factors using FOIL

     = 3(x² - 6x - 7) ← distribute the parenthesis

      = 3x² - 18x - 21 → B

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Answer:

  3 in

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The volume of the large sphere is ...

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Step-by-step explanation:

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The answer would be b) the 2 represents the two width pairs
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4 years ago
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Over the last three evenings, Mary received a total of 116 phone calls at the call center. The third evening, she received 3 tim
Tanya [424]
<h2>Answer:</h2>

First day - 25 calls

Second day - 16 calls

Third day - 75 calls

<h2>Step-by-step explanation:</h2>

You need to set variables and create system of equations first.

First evening=  x

Second evening= y

Third evening = z

x+y+z=116

z=3x

y=x-9

Now you plug in the values into the equation x+y+z=116

x+(x-9)+(3x)=116

5x-9=116

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You plug in the value of x into the other equations.

x= 25

z= 3*(25)=75

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Third day - 75 calls

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