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ikadub [295]
3 years ago
8

What equation represents a line that passes through (2,-1/2) and has a slope of 3?

Mathematics
1 answer:
Lunna [17]3 years ago
7 0

Answer:

C. y+1/2=3(x-2)

Hope this helps

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Find the measure of 4
schepotkina [342]

Answer:

147º

Step-by-step explanation:

180-33=147

5 0
3 years ago
Read 2 more answers
Jenny is taking a vacation from Florida. She travels 70 kilometers per hour for 2 hours, and 63 kilometers per hour for 5 hours.
crimeas [40]

Answer: 65 kmh

Step-by-step explanation:

70 kmh for 2 hours = 140 km.

63 kmh for 5 hours = 315 km

140 + 315 = 455/7 total hours = 65 kmh

3 0
3 years ago
Lifetime of $1 Bills The average lifetime of circulated $1 bills is 18 months. A researcher believes that the average lifetime i
OLEGan [10]
<h2>Answer with explanation:</h2>

Let \mu be the population mean lifetime of circulated $1 bills.

By considering the given information , we have :-

H_0:\mu=18\\\\H_a:\mu\neq18

Since the alternative hypotheses is two tailed so the test is a two tailed test.

We assume that the lifetime of circulated $1 bills is normally distributed.

Given : Sample size :  n=50 , which is greater than 30 .

It means the sample is large so we use z-test.

Sample mean : \overline{x}=18.8

Standard deviation : \sigma=2.8

Test statistic for population mean :-

z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

\Rightarrow\ z=\dfrac{18.8-18}{\dfrac{2.8}{\sqrt{50}}}\approx2.02

The p-value= 2P(z>2.02)=0.0433834

Since the p-value (0.0433834) is greater than the significance level (0.02) , so we do not reject the null hypothesis.

Hence, we conclude that we do not have enough evidence to support the alternative hypothesis that the average lifetime of a circulated $1 bill differs from 18 months.

6 0
3 years ago
a Salesman earn 6% Commission on all the merchandise he that he sells last month he sold $3,000 worth of merchandise how much co
irina1246 [14]

$540

6% = .06

“of” = multiply

so 6% of 9000 can be written as .06 x 9000 , which is 540

Brainliests me

4 0
2 years ago
9. <br> Which is the graph of the function y = 3x?
Fudgin [204]

Answer: 4th graph

Step-by-step explanation:

7 0
3 years ago
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