Average rate= change in alt / change in time
r=-378/7=-54ft/min
Answer:
1 kilometre =
100000 centimetres
( convert into cm )
formula = multiply the km value by 100000
( convert cm into km) = divide by 100000
I've done the first four questions. Use this method to answer the rest. For an odd number of objects find the cost of one and multiply by how many you are asked to find.
Get x on one side then you can use substitution
So, change x+3y=3 to x= -3y+3
Then plug in x to other equation to find y
2(-3y +3)-3y=-12
-6y + 6 -3y = -12
-9y = -18
Divide both sides by negative nine to find y
y = 2
Then plug in to original equation to find x
x + 3(2) = 3
x + 6 = 3
x = -3
So, y = 2 and x = -3
Answer:
nickels=13 and pennies=15
Step-by-step explanation:
0.05n+0.01p=0.80
-0.01(n+p=28)
0.05n+0.01p=0.80
-0.01n-0.01p= -0.28
0.04n=0.52
n=13
p=15
