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3 years ago

Ill give you BRAINLIST !!!

Mathematics

1 answer:

algol [13]3 years ago

8 0

Answer:

3k^2 -k+5

reason:

when adding two equations together, you combine like terms.
First, add -2 to 7 to get 5
Then, add k, or 1k, to -2k, which gives you -1k, or just -k
3k^2 stays the same because there are no like terms in the other equation to combine it with

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Please help!! Will give brainliest if correct!!

algol [13]

The answer to this question is c

8 0

3 years ago

A credit reporting agency claims that the mean credit card debt in a town is greater than $3500. A random sample of the credit c

Lera25 [3.4K]

Answer:

Claim is false

Step-by-step explanation:

Claim : A credit reporting agency claims that the mean credit card debt in a town is greater than $3500.

$H_0:\mu \leq 3500\\H_a:\mu = 3500$

n = 20

Since n <30

So we will use t test

Formula : $t =\frac{x-\mu}{\frac{s}{\sqrt{n}}}$

s = standard deviation = 391

x = 3600

n = 20

$t =\frac{3600-3500}{\frac{391}{\sqrt{20}}}$

$t =1.14$

Degree of freedom = n-1 = 20-1 = 19

α=0.10

So, using t table

$t_({\frac{\alpha}{2},d.f.})$ = 1.72

t critical > t calculated

So we accept the null hypothesis

Hence we reject the claim that the mean credit card debt in a town is greater than $3500.

7 0

3 years ago

Reasoning The spinner is divided into eight

natka813 [3]

Answer:

Because the 8 parts are equal, there is an equal chance of landing on each part. The chance of landing on any part is 1/8. This means that it would be impossible to predict with certainty which section will be landed on, because there is an equal chance of each.

Does that help?

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

What is the surface area of the rectangular prism?

azamat

Answer:

its 288 if u search formula for surface area of a rectangular prism

Step-by-step explanation:

4 0

3 years ago

WHATS 10/7 divided by 4

andre [41]

Answer:

10/28

Step-by-step explanation:

4 0

3 years ago