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77julia77 [94]
3 years ago
8

How can I solve each system of liner equations by substitution?

Mathematics
1 answer:
natka813 [3]3 years ago
8 0
I hope you can read cursive and I hope this helps! (:

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New to function, may someone answer and explain?
Elenna [48]
Answer is number 2
F(3)= (3-1)^2+ 3(3)=4+9= 13 so the first option is wrong
F(-2)= (-2-1)^2+ 3(-2)= 9-6=3 third options is wrong
F(-15)= (-15-1)^2 +3(-15)= 256-45= 211 fourth option is wrong
8 0
3 years ago
Multiply (4x-3w)(5x-7w)
andre [41]

Answer:

20x² - 43xw + 21w²

Step-by-step explanation:

We use FOIL to expand the expression:

F - First

4x(5x) = 20x²

O - Outside

4x(-7w) = -28xw

I - Inside

-3w(5x) = -15xw

L - Last

-3w(-7w) = 21w²

20x² - 28xw - 15xw + 21w²

Combine like terms and add up using correct signs and you should get your answer.

3 0
3 years ago
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Find the area of the figure below.<br> A. 288.62<br> B. 266.22<br> C. 186.66<br> D. 236.6
Setler79 [48]

Answer:

A

Step-by-step explanation:

hope this helps

7 0
3 years ago
A student who is trying to write a paper for a course has a choice of two topics, a and
Kitty [74]
Say she chooses topic A. She needs at least one book to arrive on time. The probability that no books arrive on time is 0.1 x 0.1 = 0.01 so the probability that at least one book arrives on time is 1 - 0.01 = 0.99.
Say she chooses topic B. She needs at least two books to arrive on time. The probability of no books arriving on time is 0.1 x 0.1 x 0.1 x 0.1 = 0.0001. The probability of exactly one book arriving on time is 4 x 0.1 x 0.1 x 0.1 x 0.9 = 0.0036 (binomial probability distribution formula - the 4 comes from 4C1). So the probability of her not getting enough books is 0.0001 + 0.0036 = 0.0037 and the probability she does get the books she needs on time is 1 - 0.0037 = 0.9963.
So she should choose topic B.
4 0
3 years ago
Which fraction is equivalent to a whole number? Select all that apply. A. 93 B. –168 C. 70 D. –53 E. 05
RSB [31]

Answer:

B. D. :)

Step-by-step explanation:

7 0
3 years ago
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