4 years ago

Explain why the two figures below are not similar.

Mathematics

1 answer:

yKpoI14uk [10]4 years ago

6 0

Because it is two times bigger in parts but not all the way around

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What is the solution?

Ipatiy [6.2K]

Answer:

3.) {2x+2y=62; x+4y=70

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3 years ago

Find the sample size required to achieve the given margin of error with SD = 51.02 and z - score = 1.96. Round your answer to th

coldgirl [10]

Answer:

The sample size required is 2500.

Step-by-step explanation:

z-score:

In function of the margin of error M, the z-score is given by:

$Z = \frac{M}{\frac{\sigma}{\sqrt{n}}} = \frac{M\sqrt{n}}{\sigma}$

In this question, we have that:

$\sigma = 51.02, M = 2, Z = 1.96$

$Z = \frac{M\sqrt{n}}{\sigma}$

$1.96 = \frac{2\sqrt{n}}{51.02}$

$2\sqrt{n} = 51.02*1.96$

$\sqrt{n} = \frac{51.02*1.96}{2}$

$(\sqrt{n})^2 = (\frac{51.02*1.96}{2})^2$

$n = 2500$

The sample size required is 2500.

3 0

3 years ago

4x+3y=20<br> 2x+y=7<br> How do I solve this? I forgot how to do it :/ also no answer choice

Crank

So for this, I will be using the substitution method. Firstly, subtract both sides in the second equation by 2x: $4x+3y=20\\ y=7-2x$

Next, substitute y in the first equation with 7-2x, then solve for x from there:

$4x+3(7-2x)=20\\ 4x+21-6x=20\\ -2x+21=20\\ -2x=-1\\ x=\frac{1}{2}$

Now that we got x, substitute it into either equation to solve for y:

$4*\frac{1}{2}+3y=20\\ 2+3y=20\\ 3y=18\\ y=6\\ \\ 2*\frac{1}{2}+y=7\\ 1+y=7\\ y=6$

In short, x = 1/2 and y = 6.

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3 years ago

For the given equation, find the values of a, b, and c, determine the direction in which the parabola opens, and determine the y

mariarad [96]

Answer:

Table A

Step-by-step explanation:

y = 3x^2 +2x -8

The quadratic is in the form

y = a x^2 +bx+c

a = 3 b = 2 c = -8

Since a > 0 it opens up

The y intercept is c so the y intercept is -8

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3 years ago

graph the linear equation. find three points that solve the equation then plot on the graph. -3y=-x-6

jarptica [38.1K]

Answer : easy try yourself I hope you can

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3 years ago