Question

Medal awarded can someone please help me on 20., 22, and 26. For 20 I got 3 as my answer but i'm not 100% sure and on 22 and 26 I have no clue how to solve

Answer 1

for #20, you substitute the values of x,y&z to the expression

Answer 2

i got 4 square root of 27+56-2 I used pemdas and got 4 square root of 81 which is 3

Answer 3

that's correct

Answer 4

now proceed to #22. substitute the values

Answer 5

(3*4)^2*-1 I get 12^-2

Answer 6

yes. now what happens to a number raised to a power of a negative number?

Answer 7

1/12^2

Answer 8

1/144

Answer 9

yep

Answer 10

for 26 I looked at the previous problem we solved, I subtracted 48-3 which is 45 the only thing was when I was trying to find a number raised to the 4th power it didn't turn out to be 45

Answer 11

the previous one involves multiplication that's why it's okay but since this involves subtraction, your answer is invalid

Answer 12

12*4

Answer 13

the square root of 4 is 2

Answer 14

is that your answer? well think about it, is 4 having a perfect "4th root"?
think it again

Answer 15

try to think of another factor

Answer 16

16 and 3