Ask question

Ask question

All categories

2 years ago

13

Plug in 3 for the equation y=-x^2+12x-20

1 answer:

notka56 [123]2 years ago

8 0

Step-by-step explanation:

y=(-x^2)+12x-20

=(-(3)^2)+12(3)-20

=(-9)+36-20

=16-9=7

y=7

I hope it helped you

You might be interested in

The area of the closet floor is 18 feet. If Saroya buys 32 tiles will she have enough to cover the floor?

kvasek [131]

No shel will not have enough tile. If you don't know the dimensions of the actual tile how will you solve. If you have a closet 18 square feet it could be 9 ' x 2 ' = 18 square feet. If the tiles were 12" x 6" you would need 36 tiles. If the closet was 6' x 3' = 18 square feet you could have the tiles 12" x 6" = 36 tiles. So you need to know the dimensions of the tile.

4 0

3 years ago

In triangle abc, m of acb = 90, cd is perpendicular to ab , m of acd is 60. and bd is 5 cm. find ad

weeeeeb [17]

Let us draw a picture to make the things more clear.

Attached is the image.

We have been given that

$\angle acd = 60 ^{\circ}$

Therefore, we have

$\angle dcb =90- 60= 30 ^{\circ}$

Now, in triangle bcd, we have

$\tan30 = \frac{5}{cd}\\
\\
\frac{1}{\sqrt 3}=\frac{5}{cd}\\
\\
cd=5\sqrt 3$

Now, in triangle acb, we have

$tan 60 = \frac{ad}{5\sqrt3} \\
\\
\sqrt 3= \frac{ad}{5\sqrt3}\\
\\
ad= 5\sqrt3 \times \sqrt 3\\
\\
ad= 5\times 3\\
\\
ad=15$

Thus, ad is 15 cm.

4 0

3 years ago

Solve x ^3 = 125 for x. You can see the graph of the equation y = x ^3 - 125 below.

Harrizon [31]

$\bf x^3=125\implies x=\sqrt[3]{125}\implies x=5$

5 0

4 years ago

polet [3.4K]

Answer:

first, how many cups in a gallon. 4 cups/quart, 4 quarts/gallon- 16 cups per gallon

144/16= 9 gallons

6 0

3 years ago

What is the slope of the line described by the equation 6X + 4y= 8

drek231 [11]

Answer:

$\large\boxed{\text{The slope}\ m=-\dfrac{3}{2}}$

Step-by-step explanation:

The slope-intercept form of an equation of a line:

$y=mx+b$

m - slope

b - y-intercept

We have the equation of a line in the standard form:

$6x+4y=8$

Convert to the slope-intercept form:

$6x+4y=8$ <em>subtract 6x from both sides</em>

$4y=-6x+8$ <em>divide both sides by 4</em>

$y=-\dfrac{6}{4}x+\dfrac{8}{4}$

$y=-\dfrac{3}{2}x+2$

8 0

3 years ago