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3 years ago

13

-9 + (-2)²help!! see im trying to get math done so i need help

2 answers:

kow [346]3 years ago

7 0

$-9+(-2)^2=\\
-9+4=\\-5$

patriot [66]3 years ago

6 0

$-9+(-2)^2= -9+4 \to\boxed{-5}$

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A bookstore pays $28 for a copy of a

nlexa [21]

Answer: H - 50%

Step-by-step explanation:

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3 years ago

Is 4 √ 7 2 written in simplest radical form<br><br> yes or no

lord [1]

Answer:

No.

Step-by-step explanation:

Notice that 72 can be written as 8 * 9.

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3 years ago

Read 2 more answers

Write a quadratic function, in standard form, that fits the set of points. Solve it as a system of three equations. (-4, 9), (0,

Tresset [83]

Answer:

$\boxed{y=2x^2+4x-7}$

Step-by-step explanation:

Let the quadratic function be

$y=ax^2+bx+c$

We substitute $(-4,9)$ into the equation to obtain;

$9=a(-4)^2+b(-4)+c$

$\Rightarrow 9=16a-4b+c---(1)$

We substitute $(0,-7)$ to obtain;

$-7=a(0)^2+b(0)^2+c$

$\Rightarrow c=-7---(2)$

We finally substitute $(1,-1)$ to obtain;

$-1=a(1)^2+b(1)^2+c$

$\Rightarrow -1=a+b+c---(3)$

We put equation (2) into equation (1) to get;

$9=16a-4b-7$

$16a-4b=16$

$\Rightarrow 4a-b=4---(4)$

$\Rightarrow -1=a+b-7$

$\Rightarrow a+b=6---(5)$

We add equation (4) and (5) to get;

$4a+a=6+4$

$\Rightarrow 5a=10$

$\Rightarrow a=2$

We put $a=2$ into equation (5) to get;

$2+b=6$

$\Rightarrow b=6-2$

$\Rightarrow b=4$

The reqiured quadratic function is

$y=2x^2+4x-7$

7 0

3 years ago

47.9 less than k is -21.6

Law Incorporation [45]

K is equal to -69.5 K=69.5 You put it in an equation 47.9-K=-21.6Then you subtract 47.9 from both sides and you get K=69.5

3 0

3 years ago

Ralph has a piece of shelving 3 m long. He is going to cut it into 4 equal lengths pieces. how long will each piece be?

marishachu [46]

0.75 or 3/4 m each.

Extra letters: cdvaysoHAHboaihscvia

7 0

3 years ago