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ratelena [41]
3 years ago
10

Evaluate f(x) = -2x² -4 for x=3 A. -10 B. 10 C. -18 D. -22

Mathematics
2 answers:
kenny6666 [7]3 years ago
8 0
f(x) = -2x^2-4 \\ f(x) = -2(3)^2-4 [tex][plug in 3 into your x value][tex]\\ f(x)=-18-4[tex] [3 squared equals 9. Now multiply 9*(-2) = -18[tex]\\ f(x)=-22 [ -18-4]
andrew-mc [135]3 years ago
3 0
F(x) = - 2 x² - 4 for x = 3

f(3) = - 2*3² - 4

f(3) = -2*9 - 4

f(3) = -18 -4

f(3) = -22

Answer D

hope this helps!
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Please help out and if you know help me show work ??
Ghella [55]

Answer:  14

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

Consecutive even numbers would be {2, 4, 6, 8, 10, ...}

Let x represent the smallest number, then x + 2 is the middle number and x + 4 is the largest number.

1st number: x

2nd number: x + 2

3rd number: x + 4

1st number + 2nd number + 3rd number = Sum

      (x)        +      (x + 2)       +      (x + 4)      =  48

                                                      3x + 6   =  48

                                                      3x          = 42

                                                        x           = 14

1st number: x           ⇒ x = 14

2nd number: x + 2   ⇒ 14 + 2 = 16

3rd number: x + 4    ⇒ 14 + 4 = 18

<u>Check:</u>

14 + 16 + 18 = 48 \checkmark

 

7 0
3 years ago
Marie has 5 apples, Toby takes 2 away. How many does he have less?
Natali [406]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
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dedylja [7]

Answer:

A. Draw a line from the segment to any point on the fold line.

Step-by-step explanation:

When using the paper folding method to find the midpoint of a line segment we take the following steps:

  1. Draw a line segment on the tracing paper
  2. Fold the tracing paper so that the endpoints lie on top of each other
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These steps include statements B, C, and D. Drawing a line from the segment to any point on the fold line, which is statement A,  is not included in these steps because it is not needed.

Thus, choice A is not a step in using paper folding to find the midpoint of a line segment.

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3 years ago
On his last birthday, Arnie was 144 centimeters tall. Since that time, he has grown h centimeters. Which expression tells Arnie'
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Answer:

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Step-by-step explanation:

6 0
3 years ago
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Hunter-Best [27]
Subtract the y-coordinates. This is the rise.
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slope = rise/run = -21/3 = -7
6 0
3 years ago
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