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3 years ago

Determine the direction this parabola opens: Y=x^2+2x+8 Down or Up

Mathematics

2 answers:

rewona [7]3 years ago

5 0

Hello there!

You need to find an online calculator that will help you graph them.

Answer: The direction is open UP

See the graph bellow!

Elena-2011 [213]3 years ago

3 0

The best way to solve this is to make it a function.
f(x)= x^2 +2x +8
Plug in values of x from -3 to 3 and solve ordered pairs to graph.
-3^2 +2(-3) +8 -2^2 +2(-2) +8
9 +-6 +8 4 +-4 +8
3+8 (-2,8)
11
(-3,11)
Graph the remaining points and your solution will be right in front of you.
Graph those two points and you can tell that it opens up.

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1) A school has 1600 students and they are going to vote as to whether they will completely convert the school completely off fo

fredd [130]

Answer:

Standard deviation of the students = 0.408

The students would you have to poll to be 95% confident of the outcome within /- 2% of the vote

= 0.408 X 1600

= 652.8

Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given sample size 'n' = 1600

95% confidence interval of the margin error is determined by

$M.E = \frac{Z_{0.05} S.D}{\sqrt{n} }$

Level of significance = 0.05

Z₀.₀₅ = 1.96

Given Margin of error = 2% = 0.02

$M.E = \frac{Z_{0.05} S.D}{\sqrt{n} }$

$0.02 = \frac{1.96 X S.D}{\sqrt{1600} }$

0.02 X √1600 = 1.96 X S.D

$S.D = \frac{0.02X\sqrt{1600} }{1.96} = 0.408$

Standard deviation of the students = 0.408

The students would you have to poll to be 95% confident of the outcome within /- 2% of the vote

= 0.408 X 1600

= 652.8

5 0

3 years ago

Is 4/5 bigger than 0.75

hjlf

4/5 is greater than 0.75. That is because, if you turn 4/5 into a decimal, them that decimal will be equal to 80/100. 0.75 is 75/100 as a fraction. 80/100 (4/5 simplified) compared to 75/100 is greater. The answer is yes.

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3 years ago

If Q = {all perfect squares less than 30} and p={ all odd numbers from 1 to 10}

Soloha48 [4]

When Q = {all perfect squares less than 30} and p={ all odd numbers from 1 to 10) Q ∩ P = { 1, 9}

<h3>How to calculate the value?</h3>

Set theory simply means the branch of mathematical logic that deals with sets, that can be described as collections of objects.

It should be noted that perfect squares are the numbers that can be divided to give same number.

Q = {all perfect squares less than 30}. This will be 1, 4, 9, 16, 25

P ={ all odd numbers from 1 to 10}. This will be 1, 3, 5, 7, and 9.

In this case, the common numbers to set of P and Q are 1 and 9.

Therefore, the numbers are 1 and 9 since they're common to both sides.

Learn more about numbers on:

brainly.com/question/24644930

#SPJ1

If Q = {all perfect squares less than 30} and p={ all odd numbers from 1 to 10}. Find Q ∩ P.

3 0

1 year ago

Evaluate the radical.<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B1000%7D%20" id="TexFormula1" title=" \sqrt[3]{100

Korvikt [17]

Answer:

3_/1000

= 10^(3×1/3)

=10^1

=10

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3 years ago

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kari74 [83]

Answer:

51°

Step-by-step explanation:

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2 years ago

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