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Rashid [163]
3 years ago
15

Which graph would help you find the solutions of 2 – x2 = –x?

Mathematics
1 answer:
Lelechka [254]3 years ago
6 0

Step-by-step explanation:

A quadratic graph will surely help you find the solutions

X2-x-2=0

x1=2 x2= -1

Substitute each of the x value in the original equation to get the y value

(2)^2-(2)-2= 0 (2,0)

(-1)^2-(-1)-2=-2 (-1,-2)

plot the coordinates on the graph,the graph should be a curve

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People use water to​ cook, clean, and drink every day. An estimate of 19.4​% of the water used each day is for cooking. If a fam
andreev551 [17]

Answer:

350 gallons

Step-by-step explanation:

100/19.4 = 5.15463917526

Multiply this by 67.9 gallons used for cooking = 350 gallons of water a day per family

5 0
3 years ago
What value of X makes the equation true -7x - (-5-x) = -9(2x-1) -1
Bond [772]

Answer:

x = 1/4

Step-by-step explanation:

-7x - (-5-x) = -9(2x-1) -1

-7x + 5 + x = -18x + 9 - 1

combine like terms:

-6x + 5 = -18x + 8

add 18x to each side of the equation:

12x + 5 = 8

subtract 5 from each side:

12x = 3

divide both sides by 12:

x = 3/12 = 1/4

5 0
2 years ago
A total of 600 advertisements were sold for a certain magazine. If 30 percent of the first 200 sold were in color, 20 percent of
solong [7]

Answer:

%35 of them were in color

Step-by-step explanation:

Since 30 percent of the first 200 sold were in color, 200x30/100 = 60 of them were in color.

Since 20 percent of the next 300 sold were in color, 300x20/100 = 60 of them were in color.

Since 90 percent of the last 100 sold were in color, 100x90/100 = 90 of them were in color.

In total, 60 + 60 + 90 = 210 out of 600 were in color.

The percentage is:  \frac{600}{100} = \frac{210}{x} → x = \frac{21000}{600} = 35

6 0
3 years ago
F(x) = 3x^2-3x + 1<br> Find f (-2)
Oxana [17]

Answer:

19

Step-by-step explanation:

f(x) = 3x^2-3x + 1

Let x = -2

f(-2) = 3( -2)^2-3*-2 + 1

       = 3 * 4+6+1

       = 12 +6+1

       = 19

8 0
3 years ago
If a Netflix subscription costs $8.99 per month, how much will you have spent after having it for 2 years? Explain how you got y
natali 33 [55]
You would multiply 8.99x12 so thats 107.88
Then you multiply that by 2 so 107.88x2=$215.76

Hope this helped have an amazing day and god bless :))
6 0
3 years ago
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