Simplify : 3xy + 5xz -6zx-7xy +14z (grade 8)
Find the value of x^2-11^2 (grade 8)

-4xy - 6xz + 14z

x = 11 or x = -11

Step-by-step explanation:

for the first one the 3xy and the -7xy can be combined to make -4xy

the -6zx is the same as -6xz so it can be combined with the -5xz to make -11xz

so the answer is -4xy - 6xz + 14z

for the second one assuming you mean x^2-11^2 = 0 or find the roots of y=x^2 - 11^2 then you can factorise as its the difference of 2 squares to get 0 = (x-11)(x+11)

so x = 11 or x = -11

pls thank and mark brainliest

Provided by Guathmaths

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.