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3 years ago

I don’t know how to do this problem in math

Mathematics

1 answer:

Elodia [21]3 years ago

5 0

Answer:

142

Step-by-step explanation:

Basically, in f (x) whatever x is will go in the parenthesis.

So,

$-(-9)^{2}$ $-7(-9)-2$

The two negatives that are next together will turn positive.

$9^{2}$ $+63$ $-2$

When multiplying two negative numbers turn positive.

9 x 9= 81

81+63-2

144-2=142

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Can someone please help me answer this

son4ous [18]

Answer:

A. True

Step-by-step explanation:

congruent- in agreement or harmony

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4 0

3 years ago

Please help! This is algebra btw

gulaghasi [49]

Answer:

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Step-by-step explanation:

3 0

2 years ago

Ming throws a stone off a bridge into a river below.

AURORKA [14]

Answer:

1 seconds after being thrown, the stone reaches its max height

Step-by-step explanation:

The parabolic (quadratic) equation is:

$h(x)=-5(x-1)^2+45$

Lets expand this in the form $ax^2+bx+c$ , so we have:

$h(x)=-5(x-1)^2+45\\h(x)=-5(x^2-2x+1)+45\\h(x)=-5x^2+10x-5+45\\h(x)=-5x^2+10x+40$

We can say the values of a,b, and c, now to be:

a = -5

b = 10

c = 40

The number of seconds at which the max would occur is given by the point, x, at:

$x=-\frac{b}{2a}$

We know a and b, let's find the seconds, x,

$x=-\frac{b}{2a}=-\frac{10}{2(-5)}=-\frac{10}{-10}=--1=1$

Hence,

1 seconds after being thrown, the stone reach its max height

6 0

3 years ago

Read 2 more answers

M= 2n - 2 <br> solve for n

jasenka [17]

Answer: M=2n-2

2n-2=0

2n-2+2=0+2

2n=2

Divide both side by 2

n=1

Step-by-step explanation:

5 0

3 years ago

Find midpoint (-6, 3) (4,-3)

Crank

<h2>Coordinate of mid point = (1,0)</h2>

Step-by-step explanation:

Given points are (-6,3) and (4,-3)

$x_1=-6 ,$ $y_1=3$ , $x_2= 4$ and $y_2 = -3$

Coordinate of mid point $(\frac{x_1+x_2}{2} ,\frac{y_1+y_2}{2} )$

$=(\frac{-6+4}{2} ,\frac{3+(-3)}{2})$

=(1,0)

5 0

3 years ago