Incorrect porque no sabes cómo hacerlo solo hazlo y ya!!
Answer:
So there are 35 quarters and 21 nickels.
Step-by-step explanation:
So I guess that is all we have is quarters and nickels.
Quarters are worth .25
Nickels are worth .05
Let x represent the number of quarters
Let y represent the number of nickels
x+y=56
.25x+.05y=9.8
We are going to solve this system.
I'm going to use substitution. I will solve the first equation for y and then plug that into the second equation.
y=56-x
.25x+.05(56-x)=9.8
.25x+2.8-.05x=9.8
.20x+2.8=9.8
.2x = 7
x=7/(.2) or 7*5=35
y=56-x
y=56-35=21
So there are 35 quarters and 21 nickels.
Answer:
The statement is true because 69 students study for 3 to 4 hours and 52 students study 5 to 6 hours.
Answer:
minutes
Step-by-step explanation:
We can us rule of three to solve this problem.
We have that 3 laps are done in 8 minutes, and we want to know how much time it will take to run 10 laps:
laps minutes
3 ----------->8
10----------->
To find the value of x we do as follows:
minutes
we cross multiply the values, and divide by the remaining value, thus we have the time it takes to run 10 laps is 26.27 minutes
bro
Step-by-step explanation: