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3 years ago

Which value of x satisfies the equation |-2x|=10

Mathematics

1 answer:

uranmaximum [27]3 years ago

5 0

Answer:

Step-by-step explanation:

First you will divide I-2xI on both sides that should look like this:

-2x/-2 = 10/-2

when you divide it your -2‘s should cancel out and you should be left with

-x=10/-2

when You divide 10/-2 you should get -5

10/-2= -5

your answer should look like this then

-x=-5

-5 is just one of your answers the other is 5

To get rid of the negative on the -X you have to didvide it by both sides

-x/-x=-5/-x

your answer should be

X= 5

your final answers are

-5 or 5

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Slope of (-2,-1) and (5,-1) in fraction form

dangina [55]

Slope is 0

Step-by-step explanation:

Step 1: Find slope using the formula for slope, m = (y2 - y1)/(x2 - x1) Here, x1 = -2, y1 = -1, x2 = 5 and y2 = -1

⇒ m = (-1 - -1)/(5 - -2)

= 0/7 = 0

7 0

2 years ago

Gavyn and Alex win some money and share it in the ratio 4:1. Gavyn gets £18 more than Alex. How much did they get altogether?

densk [106]

Answer:

£30

Step-by-step explanation:

Gavyn has £18 more than Alex

—› G - A = £18

—› 4u - 1u = 3u = £18

1u = £18 ÷ 3

= £6

total units = 4 + 1 = 5

5u = 5 × £6 = £30

3 0

2 years ago

(08.01)Angela wants to know how many families in her neighborhood plan to attend the parade. She puts all 120 of the neighborhoo

Zolol [24]

Using sampling concepts, the correct option regarding the validity of the inference is given as follows:

B) Yes, this is a valid inference because she took a random sample of the neighborhood.

<h3>What is sampling?</h3>

It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.

For example:

I want to estimate the proportion of New York state residents who are Buffalo Bills fans. So I ask, lets say, 1000 randomly selected New York state residents whether they are Buffalo Bills fans, and expand this to the entire population of New York State residents. If I had taken 1000 residents just from Buffalo, it would not be a representative sample.

In this problem, all addresses in the neighborhood are considered, hence a random sample was taken and the correct option is given as follows:

B) Yes, this is a valid inference because she took a random sample of the neighborhood.

More can be learned about sampling concepts at brainly.com/question/25122507

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1 year ago

A large company put out an advertisement in a magazine for a job

vova2212 [387]

Answer:

<em>C(19)=12 responses</em>

Step-by-step explanation:

<u>Exponential Decay Function</u>

The exponential function is frequently used to model natural growing or decaying processes, where the change is proportional to the actual quantity.

An exponential decaying function can be expressed as follows:

$C(t)=C_o\cdot(1-r)^t$

Where:

C(t) is the actual value of the function at time t

Co is the initial value of C at t=0

r is the decaying rate, expressed in decimal

The company puts out an advertisement for a job opening. Initially, the company got 90 responses to the advertisement. Each day, the responses declined by 10%.

This is an example where the decay model can be used to calculate the responses to the advertisement at the day t.

The initial value is Co=90, the decaying rate is r=10% = 0.10. The model is written as:

$C(t)=90\cdot(1-0.1)^t$