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3 years ago

What is 12+3(2y-3) help me

Mathematics

1 answer:

Law Incorporation [45]3 years ago

7 0

$12+3(2y-3)=\ \ \ \ \ | omit\ the\ bracket\\\\
12+6y-9=\ \ \ \ | add \ free\ numbers\\\\
6y+3\\\\Solution\ is\ 6y+3.$

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If a quarterback completed 80% of the 35 passes he threw, how many did he complete?

Georgia [21]

28/35 passes in total.

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3 years ago

In a new experimental teaching method, when students have questions in class, they send them to the instructor via a laptop comp

Anna007 [38]

Answer:

a) (0.124, 0.435)

b) I am 95% confident that the proportion difference is between 0.124 and 0.435

Step-by-step explanation:

Given that:

For male students: number of male students ( $n_m$ ) = 69, number who liked the new method (x) = 38

For female students: number of female students ( $n_f$ ) = 73, number who liked the new method (x) = 20

a) The probability that a male student like the new method ( $P_1$ ) is given as:

$P_1=\frac{38}{69} =0.55$

The probability that a female student like the new method ( $P_2$ ) is given as:

$P_2=\frac{20}{73} =0.27$

c = 95%, α = 1 -c = 0.05

$z_{\frac{\alpha }{2} }=1.96$

the difference between the proportions of male and female students who like the new method better = $P_1-P_2$ ± $z_{\frac{\alpha }{2} }\sqrt{\frac{P_1(1-P_1)}{n_m} +\frac{P_2(1-P_2)}{n_f}}$ = $0.55-0.27$ ± $1.96\sqrt{\frac{0.55(1-0.55)}{69} +\frac{0.27(1-0.27)}{73}}$ = (0.124, 0.435)

b) I am 95% confident that the proportion difference is between 0.124 and 0.435

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3 years ago

A jar pinto beans and black beans in a ratio of 1: 1, and 300 of the beans are pinto beans. How many beans in total are there in

Ber [7]

Answer:

600 beans

Step-by-step explanation:

If there are 300 pinto beans and the ratio is 1:1 there would have to be 300 black beans making 600 total.

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3 years ago

What is the value of m?<br> 1<br> _m =12-m<br> 3

alexdok [17]

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\\\\\\
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\\\\\\
m=\cfrac{36}{4}\implies m=9$

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3 years ago

A chair sold for $120 after it was reduced by 1/4 of the original price. What was the original price?

bagirrra123 [75]

It would be $480. If it was sold at $120 and was reduced by 1/4, you would multiply 120 by 4, giving you 480.

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3 years ago