3 years ago

Need help...!! plzzz

Mathematics

1 answer:

kipiarov [429]3 years ago

3 0

This is true sometimes and false sometimes, depending on the numbers.

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PLEASEEEE ANSWER ASAP

Alona [7]

Answer:

x = -1, x = 1

Step-by-step explanation:

Factor the equation. (It's a difference of squares, so we know the form will be (a-b)(a+b).)

$y = x^{2} - 1\\y = (x-1)(x+1)$

Test this by FOILing it out, if you're unsure. This is something it can be good to memorize!

Set it equal to 0.

$0 = (x+1)(x-1)$

Separate the two parenthetical expressions by the Zero Product Property.

$0 = x+1\\0 = x-1$

Solve for x!

$x=-1, x=1$

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3 years ago

If a rectangle has a length of 8 centimeters and a width of 5 centimeters, then what is the area of the rectangle in square cent

mel-nik [20]

Answer:

40 centimeters square.

Step-by-step explanation:

Area= length × width

8×5=40

Have a nice day

6 0

3 years ago

AB=A, B, equals Round your answer to the nearest hundredth.

suter [353]

Step-by-step explanation:

$\sin(20 \degree) = \frac{3}{AB} \\ AB = \frac{3}{ \sin(20 \degree) } \\ AB = \frac{3}{0.342} \\ AB = 8.77$

7 0

3 years ago

PLEASE HELP!!! Thanks in advance!! Henry is a ringmaster for the circus. He stands inside a circular circus ring that has a circ

Andreas93 [3]

Circumference = 2pi * r

3pi = 2pi r divide away pi

3 = 2 r

(3/2) = r = 1.5 m

Area = pi ( r^2) = pi (1.5)^2 = 2.25 pi m^2 ≈ 7.07 m^2

cited from web2.0calc

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3 years ago

The mean score on biology quiz was 62 with a standard deviation of 8, Jose’s score was a 74% what was his z score?

melisa1 [442]

(74-62)/8=3/2=1.5
Thank you hope this helps

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3 years ago