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3 years ago

In the phone above^

Mathematics

1 answer:

Taya2010 [7]3 years ago

3 0

Answer:

Step-by-step explanation:

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F(x)=2x^2-5;find when f(x)=-7

Daniel [21]

Answer:

x=i or no solution exists depending on the user's grade

Step-by-step explanation:

f(x) = 2x^2-5

-7 = 2x^2-5

-2 = 2x^2, x^2=-1, x=i

6 0

2 years ago

Read 2 more answers

HELP ME Using the following equation, complete the square and find the center and radius of the circle:

IrinaK [193]

Answer: $(-2,3)$ , $r=5\ \text{units}$

Step-by-step explanation:

Given

the equation is $x^2+y^2+4x-6y-12=0$

completing the square

$\Rightarrow (x^2+2\times 2\times x+4-4)+(y^2-2\times3\times y+9-9)-12=0\\\Rightarrow (x^2+2\times 2\times x+4)+(y^2-2\times3\times y+9)-12-4-9=0\\\Rightarrow (x+2)^2+(y-3)^2=25\\\Rightarrow (x+2)^2+(y-3)^2=5^2\\\Rightarrow (x-(-2))^2+(y-3)^2=5^2$

Thus, the center of the circle is $(-2,3)$ and radius is $r=5\ \text{units}$

5 0

3 years ago

If the distance between opposite numbers on a number line is 10 units, what are the opposite numbers?

Margarita [4]

Answer:

5 and -5

Step-by-step explanation:

Opposite numbers are the same distance from 0 on the number line. So, each of the numbers is a distance from zero that is half the distance between them.

The numbers are 10/2 = 5, and -5.

4 0

3 years ago

How is the difference 14/15-5/12 written as a decimal?

belka [17]

14/15-5/12 = 31/60

31/60 = 0.5166...

8 0

2 years ago

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Students collected 150 cans for a food drive. there were 23 cans of corn, 48 cans of beans, and 12 cans of tomato sauce. if a st

forsale [732]

Hello!

$\bf Answer:$

The probability that the can will be either tomato sauce or beans is $\bf \frac{2}{5}$ .

___________________________________________________

$\bf Explanation:$

To find the probability of he possible outcomes, we must add them together and find the least common denominator.

$\frac{12}{150} + \frac{48}{150} = \frac{60}{150}$

Divide the numerator and the denominator by 30:

$\frac{60}{150} = \frac{2}{5}$

7 0

2 years ago