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ankoles [38]
3 years ago
11

Ignore my work,I was just seeing if I know how to work the problem.​

Mathematics
1 answer:
HACTEHA [7]3 years ago
8 0

The values of x are 4, -4, and -2.

We can solve this by simply factorising the (x² - 16) bracket into a difference of two squares, to give us (x + 4)(x - 4), and then setting each bracket equal to 0.

When x + 2 = 0, x = -2

When x + 4 = 0, x = -4

When x - 4 = 0, x = 4

I hope this helps!

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What is 63 - x equals 2x + 3​
Lyrx [107]

Answer: x=20

Step-by-step explanation:

63-x=2x+3

-x-2x+63=3

-x-2x=3-63

-3x=3-63

-3x=-60

-3x/3=-60/3

X=20

please mark me brainliest!!

4 0
3 years ago
3x + 7 = -3x -2<br> How many solutions does this equation have
galina1969 [7]
This equation has one solution which is -1.5

3x+7=-3x-2
+2. +2
3x+9=-3x
-3x. -3x
9= -6x
/-6. /-6
X= -1.5
3 0
3 years ago
What is the domain of this function?<br> (5, 14)<br> (0,5)<br> (-20, 18)<br> (7, 7)
shutvik [7]
5,14 is the domain of this function.
4 0
3 years ago
Suppose that a customer service center claims that the telephone calls it receives last 112 seconds on average, with a standard
adoni [48]

Answer:

95% Confidence interval:  (111.02,112.98)

Step-by-step explanation:

Average = 112 seconds

Standard Deviation = 9 seconds

n = 324

Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96

112 \pm 1.96(\frac{9}{\sqrt{324}} ) = 112 \pm 0.98 = (111.02,112.98)

5 0
3 years ago
Use the drop-down menus to complete each equation so the statement about its solution is true
storchak [24]
3x + 9 + 4x + x simplifies to 8x + 9

y = mx + b: m is slope, b is y-intercept


no solutions: 8x + 8
(no solution from same slope and different y-intercept)

one solution: 4x + 1
(different slope needed)

infinitely many: 8x + 9
(same y-intercept, same slope_
3 0
3 years ago
Read 2 more answers
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