306 / 8.5 = 36 miles per hr
at 9.1 hrs....
36 * 9.1 = 327.6 miles <==
or this way...
306 / 8.5 = x / 9.1
cross multiply
8.5x = 2784.6
x = 2784.6 / 8.5
x = 327.6 miles
Answer:
i think its 2 1
Step-by-step explanation:
Step-by-step explanation:
Simplifying 40 = 15 + -9x + -2
Reorder the terms: 40 = 15 + -2 + -9x
Combine like terms: 15 + -2 = 13 40 = 13 + -9x
Solving 40 = 13 + -9x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '9x' to each side of the equation. 40 + 9x = 13 + -9x + 9x
Combine like terms: -9x + 9x = 0 40 + 9x = 13 + 0 40 + 9x = 13
Add '-40' to each side of the equation. 40 + -40 + 9x = 13 + -40
Combine like terms: 40 + -40 = 0 0 + 9x = 13 + -40 9x = 13 + -40
Combine like terms: 13 + -40 = -27 9x = -27
Divide each side by '9'. x = -3
Simplifying x = -3
Multiply the average by the number of exams to find total points:
8 x 55 = 440
9 x 60 = 540
The score of the 9th exam is the difference between the two totals:
540 - 440 = 100
They scored a 100
Answer:
C. 8
Step-by-step explanation:
still using the equation a^2 = b^2 = c^2
