Answer:
It is 92% of the students that want a to be be Movie Director
Answer:
blank 1: 25 blank 2: 49
Step-by-step explanation:
35 in the second row, if divided by 7, is 5. multiply the 5 in the second column to get the first blank: 25.
35 in the second column, if divided by, 7 is five. multiply the 7 in the first column by 7 to get the second blank: 49.
Answer:
38
Step-by-step explanation:
(72-51)+(26-9)
21+17
38
Answer:
Divide 18 kilometers by 4 kilometers per hour = 4.5 hours
multiply to check - 4 x 4.5 = 18 hours
Step-by-step explanation:
Answer:
x^2 + 2x^2 + 1 = x^4 + 2x^2 +1
Step-by-step explanation:
pythagorean theorem
a^2 + b^2 = c^2 where a and b are the legs
substitute what we know
(x^2 -1)^2 + (2x)^2 = (x^2+1)^2
FOIL
(x^2 -1)^2 = (x^2-1 ) (x^2-1) = x^4 -x^2 - x^2 +1 = x^4 -2x^2 +1
(2x)^2 = 4x^2
(x^2+1)^2 = (x^2+1 ) (x^2+1) = x^4 +x^2 +x^2 +1= x^4 + 2x^2 +1
substitute these back in
x^4 -2x^2 +1 +4x^2 = x^4 + 2x^2 +1
combine like terms
x^2 + 2x^2 + 1 = x^4 + 2x^2 +1
Since the left and right side are equal, this is a right triangle