Answer:
3+d=q and 0.10d+0.25q=1.80
There are 3 dimes and 6 quarters.
Step-by-step explanation:
This situation has two unknowns - the total number of dimes and the total number of quarters. Because we have two unknowns, we will write a system of equations with two equations using the two unknowns.
We know there are three more quarters than dimes. We write that as 3+d=q.
We also know the total cost and the value of each coin. We write 0.10d+0.25q=1.80.
We substitute 3+d for q in the second equation.
0.10d+0.25(3+d)=1.80
0.10d+0.75+0.25d=1.80
0.35d+0.75=1.80
We isolate the variable by subtracting 0.75 across the equal sign and then dividing by the coefficient of d.
0.35d=1.05
d=3
There are 3 dimes.
Answer:
7.722cm^2
Step-by-step explanation:
Area of the Square: l*w
6*6=36
Square= 36cm^2
Area of the circle= πr^2
3.142*9=28.278
36-28.278=7.722
Write an equation.
T = Total money made
M = miles driven
4 + 2.25m
T = 7.3*2.25 + 4 + 2.25*4.8 + 4
T = 8 + 7.3*2.25 + 2.25 * 4.8
4.8 * 2.25 = 10.8
7.3 * 2.25 = 16.425
T = 16.425 + 8 + 10.8
T = 35.225
So, the total amount of money he made was $35.25.
70-35 I believe that’s write
Answer:
250cm^3
Step-by-step explanation:
One mililiter of water has a volume of 1 cubic centimeter, or 1cm^3. Since there are 250 mililiters, there are 250 cubic centimeters of water.
