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Georgia [21]
3 years ago
5

What is the solution to the system of equations? y=x+3 X= -2

Mathematics
1 answer:
Mumz [18]3 years ago
7 0

Answer:

1

Step-by-step explanation:

y=x+3\\y=-2+3\\y=1

just substitute -2 for x

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Can SOmeone please help me i need to get a good grade on this please!!!!!!
Rudik [331]

Answer:

20 Units

Step-by-step explanation:

Hight times length/by half is tribular prism Formula

3 0
2 years ago
Based on historical data in Oxnard college, we believe that 37% of freshmen do not visit their counselors regularly. For this ye
slega [8]

Answer:

A sample size of 1031 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

37% of freshmen do not visit their counselors regularly.

This means that \pi = 0.37

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.

You would like to be 98% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required?

A sample size of n is required.

n is found when M = 0.035. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.035 = 2.327\sqrt{\frac{0.37*0.63}{n}}

0.035\sqrt{n} = 2.327\sqrt{0.37*0.63}

\sqrt{n} = \frac{2.327\sqrt{0.37*0.63}}{0.035}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.37*0.63}}{0.035})^2

n = 1030.4

Rounding up:

A sample size of 1031 is required.

4 0
3 years ago
Please help me to find the answer Y=2X 3X+4Y=22 Y=2X 3X+4Y=22 ​
RSB [31]
<h3>System of equations.</h3>

\left\{\begin{array}{ccc}y=2x&(1)\\3x+4y=22&(2)\end{array}\right

Put (1) to (2):

3x+4(2x)=22\\3x+8x=22\\11x=22\qquad|\text{divide both sides by 11}\\\boxed{x=2}

Substitute the value of x to (1):

y=2\cdot2\\\boxed{y=4}

Solution:

\huge\boxed{\left\{\begin{array}{ccc}x=2\\y=4\end{array}\right}

7 0
2 years ago
What two numbers multiply to -42 but also add up to -11
spayn [35]

Answer:

-14 *3 and -14 + 3

Step-by-step explanation:

8 0
3 years ago
Solve the inequality.<br><br> n−4&lt;5<br> The solution is <br> .
algol [13]

Answer:

Step-by-step explanation:

n - 4 < 5

n < 9

4 0
3 years ago
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