All categories

4 years ago

100 POINTS!!!

Mathematics

1 answer:

Rus_ich [418]4 years ago

8 0

Answer: Linear equations use one or more variables where one variable is dependent on the other. Almost any situation where there is an unknown quantity can be represented by a linear equation, like figuring out income over time, calculating mileage rates, or predicting profit. Many people use linear equations every day, even if they do the calculations in their head without drawing a line graph.

Linear equations can be a useful tool for comparing rates of pay. For example, if one company offers to pay you $450 per week and the other offers $10 per hour, and both ask you to work 40 hours per week, which company is offering the better rate of pay? A linear equation can help you figure it out! The first company's offer is expressed as 450 = 40x. The second company's offer is expressed as y = 10(40). After comparing the two offers, the equations tell you that the first company is offering the better rate of pay at $11.25 per hour.

You might be interested in

14x^2-17x-6. (^being 14x squared)

zysi [14]

Factor?, if so
if in ax^2+bx+c form then
multiply a and c together
result=z,
find 2 numbers that multiply to get z and add up to get b
so

14=a
-17=b
-6=c
14 times -6=-84
factor to find what 2 numbers add up to -17
-84=
-2, 42
-3,28
-4,21
-6,14
-7,12

add each up

-2, 42=40 nope
-3,28=25 nope
-4,21=17 yes, becase if -21 and 4 then answer
-6,14=8 nope
-7,12=5 nope

split up -17 into -21 and 4

14x^2-21x+4x-6
group
(14x^2-21x)+(4x-6)
undistribute
(7x)(2x-3)+(2)(2x-3)
revesres undistribute (ab+ac=a(b+c) or (a+b)(c)+(a+b)(d)=(a+b)(c+d))
(7x+2)(3x-3) is factore out form

then set it to zero and do th emath because if xy=0 then assume x and/or y=0 so
7x+2=0
subtract 2
7x=-2
divide by 7
x=-2/7

3x-3=0
add 3
3x=3
divide 3
x=1
x=-2/7 or 1

6 0

4 years ago

Any one that knows this please help thanks!

notka56 [123]

1 x 1 = 1
1 x -5 = -5

So, -5/7

3 0

3 years ago

On each card there is one letter. Without replacing the card you choose a second card find the probability of choosing a vowel a

oksano4ka [1.4K]

The answer is 2 out of 27<span />

5 0

4 years ago

Which two segments have the same length?

ladessa [460]

it would be B. EF and GH

8 0

3 years ago

Read 2 more answers

A company decided to test the hypothesis that the average time a company’s employees are spending to check their private e-mails

Degger [83]

Answer:

$z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232$

Since is a one sided right tailed test the p value would be:

$p_v =P(z>2.232)=0.0128$

Step-by-step explanation:

Data given and notation

$\bar X=6.6$ represent the sample mean

$\sigma=1.7$ represent the population standard deviation

$n=40$ sample size

$\mu_o =6$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the true mean is higher than 6minutes or no, the system of hypothesis would be:

Null hypothesis: $\mu \leq 6$

Alternative hypothesis: $\mu > 6$

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232$

P-value

Since is a one sided right tailed test the p value would be:

$p_v =P(z>2.232)=0.0128$

5 0

3 years ago