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3 years ago

ON THIS YOU HAVE TO GRAHP EACH NUMBER INTO A NUMBERLINE

Mathematics

2 answers:

Stolb23 [73]3 years ago

8 0

Answer: the answer will be plotted on the number line close or farther to zero

Step-by-step explanation: the answers has to be behind the zero

Nikolay [14]3 years ago

8 0

Answer:

you put 0 in the middle of each line then you put positives on the right side or top and negatives on the left side or bottom. :)

Step-by-step explanation:

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PLEASE HELP ASAP

Crank

Option D: $f(x)=-2(x+2)(x-4)$ is the function

Explanation:

Let the general form of quadratic equation be $y=a x^{2}+b x+c$

The function passes through the intercepts $(-2,0)$ and $(4,0)$ and also passes though the point $(-1,10)$

Substituting the points $(-2,0)$ , $(4,0)$ and $(-1,10)$ in the equation $y=a x^{2}+b x+c$ , we get,

$4a -2b+c=0$ -----------(1)

$16a +4b+c=0$ ----------(2)

$a-b+c=10$ -----------(3)

Subtracting (1) and (2), we get,

$\ \ 4a -2b+c=0\\ 16a +4b+c=0\\\---------\\ \ \ -12a-6b=0$ -----------(4)

Subtracting (2) and (3), we get,

$16a +4b+c=0\\\ \ a \ \ - \ \ b \ +c=10\\---------\\15a+5b=-10$ ------------(5)

Multiplying equation (4) by 5 and equation (5) by 4, to cancel the term b when adding, we get,

$-60a-30b=0\\\ 90a+30b=-60\\--------\\30a=-60\\\ \ a=-2$

Thus, the value of a is $a=-2$

Substituting $a=-2$ in equation (4), we get,

$\begin{aligned}-12 a+6 b &=0 \\-12(-2)-6 b &=0 \\ 24-6 b &=0 \\ 24 &=6 b \\ 4 &=b \end{aligned}$

Thus, the value of b is $b=4$

Now, substituting the value of a and b in equation (1), we have,

$\begin{aligned} 4 a-2 b+c &=0 \\ 4(-2)-2(4)+c &=0 \\-8-8+c &=0 \\ c &=16 \end{aligned}$

Thus, the value of c is $c=16$

Now, substituting the value of a,b and c in the general formula $y=a x^{2}+b x+c$ , we get,

$y=-2x^{2} +4x+16$

Taking out the common term as -2 we get,

$y=-2(x^{2} -2x-8)$

Factoring , we get,

$y=-2(x+2)(x-4)$

Thus, the function is $f(x)=-2(x+2)(x-4)$

7 0

3 years ago

which of the following represents the area of a rectangle whose length is x-6 and whose width is x-8?

blagie [28]

X^2 -14x +48.
Multiply the length by width

3 0

3 years ago

Just don’t understand the question to get the answer

ivann1987 [24]

Answer:

not sure if u saw the comment but

7 and 8 are congruent, and 8 is congruent to 10

that maybe the rest of the answer

7 0

2 years ago

PLEASE HELP ME

yuradex [85]

The answer is C because it’s going back 5 times meaning it’s -5

8 0

2 years ago

Read 2 more answers

Can you please help me with this one?

viva [34]

Answer: y=38

x=38

z=109

Step-by-step explanation:

because

4 0

3 years ago

Read 2 more answers