Help me PLEASE!!!!!

3x = 27

x = ?

Thank you!!

Answers

Answer 1

Answer: We will use the INVERSE OPERATION of multiplication which is division. Lets do it:-

3x = 27
27 ÷ 3 = x
27 ÷ 3 = 9
x = 9

CHECK OUR WORK:-

3x = 27
x = 9
3 · 9 = 27
We were RIGHT!!!!!

So, x = 27.

Hope I helped ya!!! xD

Answer 2

Answer: x = 9 because 3 multiplied by 9 is equal to 27

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What’s the correct answer

Answers

7-4=3

........................

To find the range, first order the data from least to greatest. Then subtract the smallest value so the answer should be 3 ?from the largest value in the set.

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood. She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond. Why is this sample likely to be biased?

Answers

1). Her sample is all from the same socio-economic group ... the people
who live in HER neighborhood.

2). Even from those, she only gets any information from about half of them.

Answer:

Given scenario is :

Alex is conducting a survey for a car company. She decides to start by interviewing some people in her neighborhood.

She prepares a questionnaire and emails it to 50 neighbors who own cars. Of those neighbors, 24 respond.

We can see that Alex sent the questionnaire to only her neighbors or people who live near her, so this will be the reason the sample will be biased.

Can anyone help me solve this system of equation by elimination?5x+4y=-30
3x-9y=-18

Answers

$\begin{cases}5x+4y=-30\ \ / \cdot (-3) \n3x-9y=-18\ \ / \cdot 5 \end{cases}\n\n \begin{cases}-15x-12y=90 \n15x-45y=-90 \end{cases}\n+\ --------\n -57y=0 \n y=0 \n\n 5x+4y=-30\n5x+4 \cdot 0=-30 \n5x=-30 \ \ / :5 \nx=-(30)/(5)\nx=-6 \n \nAnswer : \n\n \begin{cases} x=-6 \n y=0 \end{cases}$

What is the vertex form of f(x)= 5x^2 +20x-16

Answers

Answer:

Vertex of given quadratic function is (-2,-36)

Step-by-step explanation:

Given function

We have to find the vertex of the given function .

The standard quadratic function is represented by ,

Where (h,k) represents the vertex and a ≠ 0.

If a is positive, the graph opens upward, and if a is negative, then it opens downward.

We first write the given equation in standard form ,by using completing square,

We know

First taking 5 common from function, we have,

Comparing we have, a = x and

-2ab= +4x ⇒ -2b = 4 ⇒ b = -2

Add and subtract b , we get,

On simplifying, we have,

We get,

On comapring with standard equtaion , we have h = -2 and k = -36

Thus, vertex of given quadratic function is (-2 ,-36)

A radar gun measured the speed of a baseball at 103 miles per hour. If the baseball was actually going 102.8 miles per hour, what was the percent error in this measurement?