A 10. Alice is in a 20-km running race. She
always runs the first half at an average
speed of 2 km/h faster than the second
half.
a) Let x represent her speed in the first
half. Determine a simplified expression
in terms of x for the total time needed
for the race.
b) If Alice runs the first half at 10 km/h,
how long will it take her to run the
race?

answer: options?

step-by-step explanation:

"a" determine whether sage found the correct quotient. show your work

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?