Answer:
Step-by-step explanation:
Let be "n" the number of nickels the boy has in the cash box and "h" the number of half dollars the boy has in the cash box.
Set up a system of equations:
You can use the Elimination method to solve the system. Multiply the first equation by -0.5, add both equations and then solve for "n":
Finally, substitute the value of "n" into the first equation and solve for "h":
2/3 x 6/7
= 4/7 hope this helps
give brainliest
Answer:
L = 70 W = 40
Step-by-step explanation:
P = 220 ft
W = L - 30
I started guessing numbers for L that would work. When I did this, I made sure that all of the sides added up to 220 ft.
Answer:
$2310
Step-by-step explanation:
Total cost of fencing = area of fence x cost of fencing per feet
Area of a circle = nr^2
n = 22/7
r = radius = 7
Area = 22/7 x 7^2 = 154
154 x 15 = 2310
It doesn't change the answer in example 2, because the iron would still be traveling 18ft per hour