All categories

2 years ago

Evaluate A^2-B^2 for A=3 and B=-4.

Mathematics

1 answer:

MAXImum [283]2 years ago

4 0

Answer:

Step-by-step explanation:

3^2 = 9

(-4)^2 = 16

16-9= 7

You might be interested in

Miss Berk has 8 pairs of pajama pants and 3 pairs of slippers. Three pairs of the pajama pants are Harry Potter themed and one p

shusha [124]

The probability that both items will be Harry Potter themed is 1/8.

<u>Step-by-step explanation:</u>

Total Number of pajama pants n(P) =8

Total number of slippers n(S)= 3

Number of Harry Potter themed Pajama pants n(H.P)=3

Number of Harry Potter themed slippers n(H.S)=1

We have to determine the probability of selecting pants and slippers that are both Harry Potter themed.

If two events A and B are independent, then the probability of A and B is given by

P(A and B)=P(A)*P(B)

Here the events selecting Harry potter themed pants and selecting harry Potter themed slippers are independent.

$P(Harry\ Potter\ pants)=\frac{n(H.P)}{n(P)}$

$=\frac{3}{8}$

$P(Harry\ Potter\ slippers)=\frac{n(H.S)}{n(S)} \\ =1/3$

$P(Harry\ Potter\ pants\ and\ Harry\ Potter\ slippers)=P(Harry Potter pants)\times P(Harry potter slippers)$

$=\frac{3}{8}\times \frac{1}{3} =\frac{1}{8}$

Hence probability of selecting Harry potter themed pants and Harry potter themed slippers is 1/8

3 0

3 years ago

Read 2 more answers

CAN SOMEONE ANSWER THIS QUESTION PLZ QUICK!!!!

makvit [3.9K]

Answer:

140 m/s

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

What value is the 9's in 39,990?

Reptile [31]

Thousands of your talking about 9,99O but if it's only one nine it's either tens hundreds or thousand

8 0

3 years ago

A carpenter is making a backyard deck. In the measurements, he has determined that he needs to make a support triangle with an a

s2008m [1.1K]

Answer:

base = 3x - 1

height = x

area of triangle = (1/2)bh

22 = (1/2)(3x-1)(x)

44 = (3x-1)(x)

44 = 3x^2-x

0 = 3x^2-x-44

0 = 3x^2-12x+11x-44

0 = (3x^2-12x)+(11x-44)

0 = 3x(x-4)+11(x-4)

0 = (x-4)(3x+11)

x = {-11/3, 4}

throw out the negative solution (extraneous) leaving

x = 4 m (height)

Base:

3x - 1 = 3(4) - 1 = 12 - 1 = 11

Step-by-step explanation:

I hope it will help you

3 0

2 years ago

Stacey bookshelf measures 48 inches high 36 inches long and 24 in wide

shtirl [24]

Answer:

5,184 cubic inches

Step-by-step explanation:

6 0

1 year ago