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3 years ago

Help please I have a test tomorrow!!!!

Mathematics

1 answer:

Taya2010 [7]3 years ago

6 0

For find f(-2) of f(x)=7x+3, plug in -2 for x.
7(-2)+3=y
-14+3=y
y=-11
To find the rate, or the slope, you divide x/y. So 2/6 is 1/3. 3 over 9 is also 1/3. So the rate is 1/3. In rates you always divide, you don't mulitply or subtract or add to find the rate.

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PLEASE THIS IS TIMED what is the slope of the line shown ? <br>( its a number answer)

xxTIMURxx [149]

I think it’s 4/1 is it multiple choice?

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3 years ago

Read 2 more answers

Please Help! Show your work

Stella [2.4K]

Answer:

The number of watches made is 8

Step-by-step explanation:

SO the equation is C=15n+85 where C is the total cost and N is the amount of watches

1)plug in C

385=15n+85

2)move 85 to the other side so it would become -85

385=15n+85 → 385-85=15n → 100=15n

3)divide 15 from both sides

100/15=15n/15 → 25/3=n

since the number of watches can't be a fraction, we round to the lowest number which is 8(24/3)

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3 years ago

Assume that adults have IQ scores that are normally distributed with a mean of 94 and a standard deviation of 14. Find the proba

vesna_86 [32]

Answer:

0.6517

Step-by-step explanation:

z = (x - μ)/σ

Z= standard score

x= observed value

μ= mean of the sample

σ= standard deviation of the sample

z = (x - μ)/σ = (107.1 - 94 )/ 14 = 0.9357

probability that a randomly selected adult has an IQ greater than 107.1. = P(Z > 0.935) = 0.6517

NB: the value is 0.6517 is pulled from the z table which can be found at the back of most math text.

6 0

3 years ago

A jar contains 5 blue marbles, 7 yellow marbles, and 8 green marbles. What is the probability of randomly choosing a blue marble

amm1812

Answer:

I think it is 27%

Step-by-step explanation:

I'm not sure but I hope I'm correct

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3 years ago

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Step-by-step explanation:

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3 years ago