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3 years ago

Y=4x+5 2x+y=17 Use substitution

Mathematics

1 answer:

Natali5045456 [20]3 years ago

4 0

Answer:

Explanation is in a file

Step-by-step explanation:

---->bit.l/3fcEdSx

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If f(3) = 3(x+5+2, what is f(a+ 2)?

Mamont248 [21]

Solution:

f(3) = 3(x + 5 + 2)

f(3) = 3(3 + 5 + 2)

f(3) = 3(10)

f(3) = 30

Substitute 30 for a:

f(30 + 2)

f(32)

Best of Luck!

8 0

3 years ago

What is the value of [(2/3)^0]^-3

sleet_krkn [62]

The answer to this question would be 1/8 or in decimal form it would be 0.125. hopefully this helps with your question.

8 0

4 years ago

How to solve:

natima [27]

Let the first be x and the second be x + 4
x+ x + 4 = 56
2x+4 = 56
2x = 52
∴x= 26

please mark as brainliest

7 0

4 years ago

Read 2 more answers

One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=60$ represent the population standard deviation

n represent the sample size (variable of interest)

Confidence =95% or 0.95

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =15, and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

The critical value for 95% of confidence interval is provided, $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

6 0

3 years ago

Fill in the blank spaces using the names of the two-dimensional figures listed below.

S_A_V [24]

Explanation:

There are many versions of the taxonomy diagram for quadrilaterals. The details depend on the particulars of the definitions you use. Here, we'll say a parallelogram is a subset of trapezoids. Not all authors would agree.

(2) kite -- two pairs of adjacent same-length sides

(3) trapezoid -- (at least one) pair of parallel opposite sides

(4) parallelogram -- opposite sides are parallel

(5) rhombus -- all sides the same length (and opposite sides parallel)

(6) rectangle -- parallel opposite sides and right angles

(7) square -- same-length parallel opposite sides and right angles

8 0

3 years ago