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GarryVolchara [31]
3 years ago
15

What is the absolute value of |-7.8| What is the absolute value of -7.8

Mathematics
2 answers:
Vaselesa [24]3 years ago
5 0
They're both exactly 7.8 .
inysia [295]3 years ago
5 0

Absolute value means distance from zero on a number line. -7.8 is 7.8 units away from zero on the number line. The absolute value of -7.8 is 7.8. Another way of thinking about absolute value is no matter what number you have inside the absolute value, the result will always be positive. Both of these numbers are 7.8 units away from zero.

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Find the value of x ANSWER IS NOT
gulaghasi [49]

Answer:

x = 11√2

Step-by-step explanation:

We can notice the triangle given is a special triangle, a 45°- 45°- 90° triangle. The hypotenuse of a 45°- 45°- 90° is √2 times the length of a side. We can set up the equation(using x as the side):

x * √2  = 22

We can divide by √2 on both sides to get:

x = 22 / √2

To rationalize the denominator, we multiply by √2 / √2 on the right side:

x = 22√2 / 2

This simplifies to:

x = 11√2

3 0
2 years ago
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Help fill in the blanks no
DerKrebs [107]

Answer:

Here is the full proof:

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∠ADC = 90°               Definition of perpendicular lines

BC ⊥ AB                    Given

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7 0
3 years ago
Denise is a professional swimmer who trains, in part, by running. she would like to estimate the average number of miles she run
SSSSS [86.1K]
Given:
n = 20, sample size
xbar = 17.5, sample mean
s = 3.8, sample standard deiation
99% confidence interval

The degrees of freedom is 
df = n-1 = 19

We do not know the population standard deviation, so we should determine t* that corresponds to df = 19.
From a one-tailed distribution, 99% CI means using a p-value of 0.005.
Obtain
t* = 2.8609.

The 99% confidence interval is
xbar +/- t*(s/√n)

t*(s/√n) = 2.8609*(3.8/√20) = 2.4309
The 99% confidence interval is
(17.5 - 2.4309, 17.5 + 2.4309) = (15.069, 19.931)

Answer: The 99% confidence interval is (15.07, 19.93)
4 0
3 years ago
I need help with this, asap!!!
Leni [432]
The answer to this is d!
4 0
3 years ago
Read 2 more answers
What's the exact value for this trigonometric function sin 60 degrees
Elodia [21]
\sin60^\circ=\dfrac{\sqrt{3}}{2}
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