Suppose the quadratic function with and . Solve .

Step-by-step explanation:

hello :

let : X1 and X2  this solution you have : X1 + X2 = -b/a

but given : -b/2a = 1   so : -b/a = 22

now :  X1 + X2 = 2

other solution is : -2  because f(-2) =0

so : -2+X2 = 2    X2 = 4

f(x) = (x-4)(x+2) = x²-2x-8      a=1   and b=- 2   and c= -8

verify : f(-2) = (-2)²-2(-2)-8=8-8=0right

-b/2a = -(-2)/2(1) = 1 ...right

the soultions are : 4  and -2

answer:

(-8,7)

explanation:

we know that  

f

(

−

3

)

=

7

therefore, if we wish to get the output as 7, in the function, we need to have our input to be -3.

looking at the function  

f

(

x

+

5

)

, what should the value of x be, such that the input in the function becomes 7?

we simply equate the terms,

x

+

5

=

−

3

x

=

−

8

thus, the point on the new function would be  

(

−

8

,

7

)

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.