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3 years ago

What is the solution to this equation? √x=7 A. x=√ 49 B. x=√7 C.x=14 D. x= 49

2 answers:

8 0

Let's not look at the option and try to solve it.
√x=7
Let's look at this. Square roots are the number that is multiplied by itself to make that number. For example, 2 is the square root of 4, 3 is the square root of 9.
We need to multiply 7 by itself to find x.
7×7=49
So, D. =49.

galben [10]3 years ago

4 0

D.49 since the square root of 49 is 7

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What is the value of v in the equation? V - 7 = 15 + 12 A.21 B.13 C.27 D.34

Serjik [45]

Answer:

D. 34

Step-by-step explanation:

15+12=27

v-7=27

+7. +7

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v=34

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2 years ago

A bag contains 42 red marbles, 6 white marbles, and 8 gray marbles. You randomly pick out a marble, record its color, and put it

Elanso [62]

For any single draw,

$\mathbb P(\text{white})=\dfrac6{42+6+8}=\dfrac6{56}$
$\mathbb P(\text{gray})=\dfrac8{42+6+8}=\dfrac8{56}$

Drawing a white marble or a gray marble are disjoint events; only one of them can happen. So

$\mathbb P(\text{white or gray})=\mathbb P(\text{white})+\mathbb P(\text{gray})-\underbrace{\mathbb P(\text{white and gray})}_0$
$\mathbb P(\text{white or gray})=\dfrac6{56}+\dfrac8{56}=\dfrac{14}{56}$

Out of 224 draws, you should expect $\dfrac{14}{56}\times224=56$ of the marbles to be either white or gray.

6 0

3 years ago

Read 2 more answers

Which of the following is the graph of y = 5?

Annette [7]

Slope: 0
Y-intercept: 5
The answer is 0,5
I hope this helps.

8 0

3 years ago

Computers from a particular company are found to last on average for 24 months without any hardware malfunction with a standard

vodomira [7]

Answer:

At least 68% of observations lie between 22 and 26 months.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 24

Standard deviation = 2

22 = 24 - 2

22 is one standard deviation below the mean

26 = 24 + 2

26 is one standard deviation above the mean.

So, by the empirical rule, at least 68% of observations lie between 22 and 26 months.

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3 years ago

20 is what percent of 52? Round your answer to the nearest tenth.

NARA [144]

The answer is 10.4 because you multiply 0.2 by 52

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3 years ago