In a quadratic equation: solve -2x^2+18=7x & solve x^2+5x+6

x = 1.72, -5.22

x = -2, -3

Step-by-step explanation:

To solve a quadratic, rearrange the terms into standard form ax² + bx + c. Then factor or use the quadratic formula to solve for x.

-2x²+18 = 7x                  Subtract 7x from both sides

-2x² - 7x + 18 = 0          Solve using quadratic formula a = -2, b = -7 and c = 18

x² + 5x + 6                    Factor

(x+2)(x+3)                      Set equal to 0 and solve for x

x+2 = 0 and x +3 = 0      x = -2, -3

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.

1) is right

step-by-step explanation: