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3 years ago

Please answer!!!! Express (x + 9)2 as a trinomial in standard form.

Mathematics

1 answer:

Ghella [55]3 years ago

4 0

Answer:

x² +18x +81

Step-by-step explanation:

(a+b)²=a²+b²+2ab

(x+9)² = x²+9²+2*x*9= x² +18x +81

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Write the equation of the line that passes through the points (- 5, 1) and (2, 0) . Put your answer in fully reduced slope inter

Doss [256]

Answer:

y=-1/7x + 12/7

Step-by-step explanation:

Start by finding the slope

m=(1-0)/(-5-2)

m=-1/7

next plug the slope and the point (-5,1) into point slope formula

y-y1=m(x-x1)

y1=1

x1= -5

m=-1/7

y- 1 = -1/7(x - -5)

y-1=-1/7(x+5)

Distribute -1/7 first

y- 1=-1/7x + 5/7

Add 1 on both sides, but since its a fraction add 7/7

y=-1/7x + (5/7+7/7)

y=-1/7x+12/7

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3 years ago

Solve xy-6=k for x <br><br><br> Please help me out

dedylja [7]

Answer:

$\times = \frac{k + 6}{y}$

Step-by-step explanation:

$xy - 6 = k \\ xy = k + 6 \\ x = \frac{k + 6}{y}$

4 0

3 years ago

How can you tell that a fraction is a unit fraction

a_sh-v [17]

You can tell that a fraction is a unit fraction when it is over a unit of one. This is also known as unit rate.

6 0

3 years ago

Read 2 more answers

The curved part of this figures is a semicircle.

vovangra [49]

First we join the two endpoints of the semicircle and that will be the diameter.

And to find the length of the diameter, we have to use distance formula, with one endpoint (3,2) and the other is (-4,-2) .

SO we get

$Diameter = \sqrt{ {-4-3)^2 +(-2-2)^2 } = \sqrt{49+16} = \sqrt 65$

Radius is half of diameter, so the radius is

$Radius= \frac{ \sqrt{65}}{2}$

Formula of area of circle is

$Area = \pi r^2$

So the area of semicircle is

$=(1/2) \pi ( \frac{ \sqrt{65}}{2})^2 = 8.125 \pi \square \units$

And the other figure is a triangle, with

$Base = 3-(-4)=3+4=7 \\ height = 2-(-2) = 2+2 =4$

$Area = (1/2)*4*7= 14 square units$

Therefore, total area is the sum of area of semicircle and area of triangle,

And we will get

$Total \ area= 14 + 8.125 \pi \ units^2$

Correct option is the third option .

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4 years ago

Read 2 more answers

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djverab [1.8K]

Answer:

Step-by-step explanation:

The y-intercept is 2 and the slope is 1. Therefore, the answer is 2y=x. :)

5 0

3 years ago