2 years ago

Find the value of 2x + 8y when x = - 5 and Y = 6

Mathematics

1 answer:

mestny [16]2 years ago

8 0

i think the answer is -50 but im

not sure

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given the rule s=t+3 and the starting number 0, create a table to show the first 5 terms in the sequence graph the resulting ord

IRINA_888 [86]

0= 3
1= 4
2=5
3=6
4=7
5=8
6=9
7=10

8 0

3 years ago

we believe that 42% of freshmen do not visit their counselors regularly. For this year, you would like to obtain a new sample to

Maksim231197 [3]

Answer:

A sample of 1077 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:

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

42% of freshmen do not visit their counselors regularly.

This means that $\pi = 0.42$

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 $Z = 2.327$ .

How large of a sample size is required?

A sample size of n is required, and n is found when M = 0.035. So

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

$0.035 = 2.327\sqrt{\frac{0.42*0.58}{n}}$

$0.035\sqrt{n} = 2.327\sqrt{0.42*0.58}$

$\sqrt{n} = \frac{2.327\sqrt{0.42*0.58}}{0.035}$

$(\sqrt{n})^2 = (\frac{2.327\sqrt{0.42*0.58}}{0.035})^2$

$n = 1076.8$

Rounding up:

A sample of 1077 is required.

3 0

3 years ago

1. Evaluate each expression when x = -2 and y = 3.

borishaifa [10]

a) 3(-2) + 4(3) = -6 + 12 = 6

b) 2(-2) -3(3) +5 = -4 -9 + 5 = -8

c) 4(-2) -(3) = -8 -3 = -11

d) -(-2) -2(3) = 4 -6 = -2

e) (1/2)(-2) +(3) = -1 +3 = 2

f) (2/3)(3) -(1/2)(-2) = 2 + 1 = 3

5 0

3 years ago

If 4321 - 4322 = 10 <br> Then what's 3321 - 3322 = ?

ArbitrLikvidat [17]

Answer:

10 sorry if i'm wrong

Step-by-step explanation:

8 0

3 years ago

Which of the following represents the factorization of the trinomal below

seraphim [82]

C because you factor it out

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2 years ago

Find the value of 2x + 8y when x = - 5 and Y = 6​

Find the value of 2x + 8y when x = - 5 and Y = 6