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

total of apples - take away four

6-4 = 2

answer is 2 apples

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: