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3 years ago

How do you work this Math problem?

Mathematics

1 answer:

ss7ja [257]3 years ago

6 0

I would say 0, -5/2 but I am unsure as I have this same problem

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brando had 15 pairs of kicks,then went nuts and bought a bunch more onlie.After they all showed up.he realized he had 84 pairs o

Lelu [443]

Brando could subtract the 84 pairs of shoes by 15 to see how much pairs of shoes he bought online

5 0

4 years ago

Prove the identity cos(x-y)-cos(x+y)=2sinx siny

True [87]

Answer:

see explanation

Step-by-step explanation:

Using the Addition/ Subtraction formulae for cosine

Consider the left side

cos(x - y) - cos(x + y)

= cosxcosy + sinxsiny - (cosxcosy - sinxsiny) ← distribute

= cosxcosy + sinxsiny - cosxcosy + sinxsiny ← collect like terms

= 2sinxsiny = right side ⇒ proven

8 0

4 years ago

When individuals in a sample of 150 were asked whether or not they supported capital punishment, the following information was o

borishaifa [10]

Answer:

$\chi^2 = \sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}$

The expected values for all the categories is :

$E_i =\frac{150}{3}=50$

And then the statistic would be given by:

$\chi^2 = \frac{(40-50)^2}{50}+\frac{(60-50)^2}{50}+\frac{(50-50)^2}{50}=4$

And the best option would be:

b. 4

Step-by-step explanation:

For this problem we have the following observed values:

Yes 40 No 60 No Opinion 50

And we want to test the following hypothesis:

Null hypothesis: All the opinions are uniformly distributed

Alternative hypothesis: Not All the opinions are uniformly distributed

And for this case the statistic would be given by:

$\chi^2 = \sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}$

The expected values for all the categories is :

$E_i =\frac{150}{3}=50$

And then the statistic would be given by:

$\chi^2 = \frac{(40-50)^2}{50}+\frac{(60-50)^2}{50}+\frac{(50-50)^2}{50}=4$

And the best option would be:

b. 4

7 0

4 years ago

4y -7 = 5 -2y +2y +2y add 2y to each side 6y -7 = 5 +7 +7 add 7 to each side y =

Simora [160]

4y - 7 = 5 - 2y

Add 2y to both sides.

6y - 7 = 5

Add 7 to both sides.

6y = 12

Divide both sides by 6

y = 2

3 0

3 years ago

Read 2 more answers

Lines of ________________ run north and south but measure east and west. *

wolverine [178]

Answer:

prime meridian

Step-by-step explanation:

look it up

4 0

4 years ago

Read 2 more answers