Solve equation by using the quadratic formula. 2x²-5x-7​

3.5 or -1 first of all know the formula method , I Don't have the right symbols so I don't want to confuse you so the number infront of x^2 or any alphabet with a square is a , b is the number infront of the letter without a square and c is the single number without an alphabet, this is the easiest formula compared to factorization method so check online or your textbook for the formula

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

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.