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givi [52]
3 years ago
14

Solve for x: |4x + 12| = 16

Mathematics
2 answers:
irina1246 [14]3 years ago
7 0
Solve Absolute value
4x + 12 = 16 or <span>4x + 12 = -1<span>6
</span></span>===============================================
1.) 4x+12=<span>16
Subtract 12 from both sides
</span><span><span>4x+12-1</span>2</span>=<span>16-12
</span>4x = 4
Divide by 4
4x ÷ 4 = 4 ÷ 4
x = 1
=================================================================
2.) 4x+12=-<span>16
</span>Subtract 12 from both sides
<span><span>4x+12-</span>12</span>=-<span>16-12
</span><span>4x</span>=-<span><span>28
</span></span>Divide each side by 4
4x ÷ 4 = -28 ÷ 4
x = -7
================================================================
X = 1 and x = -7 is your answer
JulijaS [17]3 years ago
6 0
4x+12=16
4x=4
x=1

or

-(4x+12)=16
-4x-12=16
-4x=28
x=-7

answer Choice C is correct
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May someone help me with this, it's fairly easy.
Likurg_2 [28]

Answer:

A and B are correct

Step-by-step explanation:

Student C is wrong because they broke up 3/4 into

2/2 + 1/2  

but 2/2 + 1/2 = 3/2, which is not equal to 3/4

7 0
2 years ago
Which of the following expressions is equivalent to -9?
dlinn [17]

Answer:

A and C

Step-by-step explanation:

-3*3 = -9

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6 0
2 years ago
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A line passes through the points (2,21) and (8,27). Write a linear function rule in terms of x and y for
tatiyna
We have two points so we can find the gradient using y1-y2/x1-x2
gradient = 21-27/2-8
= 1
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6 0
2 years ago
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Please help me with this question!! I also need the steps
e-lub [12.9K]

Hi there!

\large\boxed{x = \frac{\pi}{3} \text{ and } \pi}

We are given:

cos(7x)cos(4x) = -1 - sin(7x)sin(4x)

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cos(7x)cos(4x) + sin(7x)sin(4x) = -1

The corresponding trig identity is cos(A - B). Thus:

cos(7x - 4x) = cos(7x)cos(4x) + sin(7x)sin(4x) = -1

cos(3x) = -1

cos = -1 at  π, so:

3x = π

x = π/3

We can also find another solution. Let 3π = -1:

3x = 3π

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Thus, solutions on [0, 2π) are π/3 and π.

8 0
3 years ago
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professor190 [17]

Answer:

9.108

You only need to look at the 10nths place to determine which number is larger

Step-by-step explanation:

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2 years ago
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