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2 years ago

What is (7-3b)(7+3b)

Mathematics

1 answer:

lidiya [134]2 years ago

8 0

The answer i got was 49-9b^2

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Solve pls brainliest

BigorU [14]

Have a great day!!!!

7 0

2 years ago

Read 2 more answers

Find the perimeter of a rectangle with dimensions 12 feet and 15 feet

Ronch [10]

Answer:

The perimeter is 54 square units

Step-by-step explanation:

You find the sum of 12+12 and that's 24, and 15+15, and that is 30, and 30+24 is 54.

Hope this helped!

8 0

3 years ago

Read 2 more answers

If x = 7, what is the value of the expression above?

givi [52]

if x= 7 what is the value of x-4

7 - 4

if y=3 what is the value of 8y

8 x 3

= 24

if x=7 what is the value of 3x-4

(3 x 7) - 4

= 17

if x=7 and y=3 what is the value of 2x-7y

(2 x 7) -(7 x 3)

= - 7

if x=7 and y=3 what is the value of 4y-X

(4 x 7) - 3

= 25

Hope this helps

8 0

2 years ago

If f(x) = 4x-9, evaluate f(3) <br>I need HELP ASAP!!!!!!!!!!!

seropon [69]

Answer:

substitute 3 as in x:

4(3)-9

= 12-9

= 3

Hope this helped - have a nice day & be safe

8 0

2 years ago

In a certain Algebra 2 class of 25 students, 13 of them play basketball and 11 of them play baseball. There are 4 students who p

Flauer [41]

Answer:

$\frac{4}{5}$

Step-by-step explanation:

Given: There are 2 classes of 25 students.

13 play basketball

11 play baseball.

4 play neither of sports.

Lets assume basketball as "a" and baseball as "b".

We know, probablity dependent formula; P(a∪b)= P(a)+P(b)-p(a∩b)

As given total number of student is 25

Now, subtituting the values in the formula.

⇒P(a∪b)= $\frac{13}{25} +\frac{11}{25} -\frac{4}{25}$

taking LCD as 25 to solve.

⇒P(a∪b)= $\frac{13\times 1+11\times 1-4\times 1}{25} = \frac{20}{25}$

∴ P(a∪b)= $\frac{4}{5}$

Hence, the probability that a student chosen randomly from the class plays both basketball and baseball is $\frac{4}{5}$ .

6 0

3 years ago