Answer:
The answer is 172.7 centimeters.
Step-by-step explanation:
1.) There are 12 inches in a foot. Multiply 5 feet by 12 inches, the answer would be 60 inches.
2.) Add the additional 8 inches to the 60 to get 68 inches total.
3.) Multiply 68 inches by 2.54 centimeters, the answer is 172.72 centimeters.
4.) Round off your answer to the tenths decimal place to get 172.7 centimeters total.
10 hundreds make 1 thousand
so 20 hundreds would make 2 thousands
:D Your welcome
Answer:
25%
Step-by-step explanation:
is the formula for calculating x1 and x2
To prove x1 + x2 = -b/a all we need to do is to express x1 and x2 from equation above
once we do we will get -2b/2a which is equal to -b/a because square root part will negate each other. one has + sign in front and other - sign
Showing that x1x2 = c/a goes similar way.
the numerator parts is actually difference of squares. after that we will have:
-b^2 -b^2 + 4ac = 4ac
in denominator we have 2a*2a = 4a^2
4ac/4aa = c/a