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3 years ago

Solve the equation by factoring. 4x2 + 8x = 21

Mathematics

1 answer:

ollegr [7]3 years ago

4 0

Answer:

answer =3/2 or x = -7/2

Step-by-step explanation:

....

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Select all angle measures for which cos0= 1/2

mrs_skeptik [129]

Answer:

cos -60° = $\frac{1}{2}$ ,

cos 660° = $\frac{1}{2}$

Step-by-step explanation:

hope it helps

6 0

3 years ago

Solve the following inequality for h then simplify <br> 8h-2>3h+2

Nata [24]

Answer:

8h-3>3h +2

8h-3h>2+3

5h>5

h>1

don't forget to draw your number line

pls make me the brainliest

6 0

3 years ago

Simplify thefollowing algebraic expression 6(2y +8) -2 (3y

telo118 [61]

6(y+8) is the answer but you didn’t finish the equation so

5 0

3 years ago

Jodie read 42 randomly chosen books from each library in her city. Each library is the same size.

ahrayia [7]

Answer:

Yes!

Step-by-step explanation:

The definition of Representative is

A representative sample is a group or set chosen from a larger statistical population or group of factors or instances that adequately replicates the larger group according to whatever characteristic or quality is under study

so your book is whats understudy and with that you'll know that yes, yes it is

3 0

3 years ago

Simplify the rational expression. State any restrictions on the variable.

ExtremeBDS [4]

we are given

$\frac{(n^4-10n^2+24)}{(n^4-9n^2+18)}$

Firstly, we will factor numerators and denominators

$\frac{(n^4-10n^2+24)}{(n^4-9n^2+18)}=\frac{(n^2-6)(n^2-4)}{(n^2-3)(n^2-6)}$

we can see that

n^2 -6 is factor on both numerator and denominator

so, it will get cancelled

and n^2 -6 can not be equal to 0

so, one of restriction is

$n^2-6\neq 0$

$n\neq -+ \sqrt{6}$

we can simplify it

$\frac{(n^4-10n^2+24)}{(n^4-9n^2+18)}=\frac{(n^2-4)}{(n^2-3)}$

we know that denominator can not be zero

$n^2-3\neq 0$

$n\neq -+ \sqrt{3}$

so, option-B.......Answer

3 0

3 years ago