12 systems using substitution2/10maldonathanan education center offers a total of 400 math, physics andchemistry courses. the ratio of the number of math courses tophysics courses to chemistry courses is 3: 4: 3. the cost of amath class is $25 per class and the cost of physics class is $20per class. it would cost $9.800 to take the 400 classes once. what's the price of each chemistry class? $ .00swa

4

step-by-step explanation:

the answer is 1/4

step-by-step explanation:

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours