A trampoline park or an arcade
Answer:
8a - 7
Step-by-step explanation:
First, subtract 12a from 20a
20a - 12a
= 8a
Now, subtract -3 from -10.
Subtracting a negative number is the same as adding a positive number, so add 3 to -10.
-10 + 3
= -7
Put together 8a and -7
8a - 7
So, the simplified expression is 8a - 7
Answer:
There are 8 dimes there.
Step-by-step explanation:
This question is solved used a system of equations.
I am going to say that:
x is the number of nickels.
y is the number of dimes.
19 coins
This means that x + y = 19.
A nickel is worth $0.05. A dime is worth $0.1. The total of these coins is $1.35. So
0.05x + 0.1y = 1.35
How many dimes are there?
We have to find y.
From the first equation: x = 19 - y.
Replacing in the second:
0.05(19 - y) + 0.1y = 1.35
0.95 - 0.05y + 0.1y = 1.35
0.05y = 0.4
y = 0.4/0.05
y = 8
There are 8 dimes there.
Answer:
sqrt(2h/g) = t
Step-by-step explanation:
h=1/2gt^2
We want to get t alone
First multiply by 2 to get rid of the fractions
2*h=2*1/2gt^2
2h = g t^2
Then divide by g on each side
2h/g = g t^2/g
2h/g = t^2
Then we need to take the square root of each side
sqrt(2h/g) = sqrt(t^2)
Normally we take the ± sqrt, but since time must be positive ( cannot have negative time)
sqrt(2h/g) = t
Answer:
surface area
Step-by-step explanation:
they are the surface area equations for the shapes