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Mila [183]
3 years ago
13

I need help please.

Mathematics
1 answer:
pishuonlain [190]3 years ago
7 0

Distributive property means that you have to multiply everything directly outside the parent hes to everything inside the parentheses. For this problem multiply 7 to the 9x and to the -9 like so:

7(9x) + 7(-9)

63x + (-63)

63x - 63

Look at image below if you are still confused

Hope this helped!

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Please Answer ASAP
Nat2105 [25]

Answer:

use a ratio

Step-by-step explanation:

you work 10 hours and make $25.  How much do you earn per hour? (this is your unit rate.)

<u>10 hours</u>

$25

divide and you get an answer of $2.50 per hour

to check your answer work the problem backwards, take $2.50 times 10 hours = $25

6 0
4 years ago
Read 2 more answers
Penelope invested 60% of her retirement account in stocks and 40% in gold. Penelope believes that the return to stocks over the
hjlf

Answer:

1) mean = 21, standard deviation σ = 21.9317

2) the probability that Penelope's portfolio will earn at least 12% in the next 12 months is 0.6591

Step-by-step explanation:

 Given the data in the question;

1. According to Penelope's beliefs, what are the mean rate of return and the standard deviation of return of her portfolio?

Mean μ = Return = ( 60% × 15) + ( 40% × 30 ) = 9 + 12 = 21

mean = 21

standard deviation σ = √( (0.6² × 25²) + ( 0.4² × 40² ) )

standard deviation σ = √( (0.36 × 625) + ( 0.16 × 1600 ) )

standard deviation σ = √( 225 + 256 )

standard deviation σ = √481

standard deviation σ = 21.9317

2)  What is the probability that Penelope's portfolio will earn at least 12% in the next 12 months

so we are to find P( X > 12 )

converting into standard normal variable;

⇒ P( Z  > X-μ  / σ  )

= P( Z  > ( 12-21  / 21.9317  ) )

= P( Z  > ( -9 / 21.9317  ) )

= P( Z  > -0.41 )  

FROM z-score table; P( Z  > -0.41 ) is 0.3409

P( X > 12 ) = 1 - 0.3409

P( X > 12 ) = 0.6591

Therefore,  the probability that Penelope's portfolio will earn at least 12% in the next 12 months is 0.6591

3 0
3 years ago
PLEASE HELP NEED ANSWER NOW!!!!<br>Which of these graphs resembles this function? y=x^2
Marizza181 [45]
It would be A. The graph curves upward <span />
6 0
3 years ago
Read 2 more answers
Find the slope of the line passing through the points (-5,3) and (-7,5).
Alekssandra [29.7K]

Step-by-step explanation:

points (-7,5) and (5,-3)?

This would mean to subtract the y coordinates:

5 - (-3) = 8

Then subtract the x coordinates in the same order:

-7 - 5 = -12

Then divide the y result by the x result for the slope:

8/-12 is the slope.

In simplest form, this is equivalent to -2/3

4 0
3 years ago
Statistics Question:
Solnce55 [7]
I know my cases are f(0,0), f(0,1), f(0,2), f(0,3), f(1,0), f(1,1), f(1,2), f(1,3), f(2,0), f(2,1), f(2,2), f(2,3), f(3,0), f(3,1), f(3,2), f(3,3) and that:<span>
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since there are 3 cards being drawn we cannot have more than 3 jacks or 3 kings or combination of 3 of the two, or 0 jacks and 0 king
</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
3 0
3 years ago
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