Using a system of equations, it is found that the meter contains 20 dimes and 10 quarters.
<h3>System of equations:</h3>
For the system, the variables are:
- x is the number of dimes.
- y is the number of quarters.
A dime is worth $0.1 and a quarter is worth $0.25. In total, the parking meter is filled with $4.50, hence:

There are twice as many dimes as quarters, hence:

Then:







There are 20 dimes and 10 quarters in the parking meter.
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Answer:
32
Step-by-step explanation:
Possible outcomes in a fair sided die 1,2,3,4,5,6 = 6 possible outcomes
Odd numbers = 1,3,5 = 3 odd numbers
Probability of rolling an odd number =
= 
Total number of rolls = 64
expected number of odd number rolls in 64 roll,
=
x 64 = 32
Answer:
18
Step-by-step explanation:
-2(-3)+12=18
Answer:
Length is 30cm
Width is 13cm
Step-by-step explanation:
Let the width be x cm;
The length will be 2x + 4 cm
Perimeter = 86cm
Perimeter is given by (2 × length) + (2 × width)
2(2x + 4) + 2x = 86cm
4x + 8 + 2x = 86cm
6x = 86 - 8 = 78cm
x = 78/6 = 13cm
Width (x) = 13cm
Length = 2(13) + 4 = 26 + 4 = 30cm
Step-by-step explanation:
80 because wht the ratio is implying is that for every boy there is the same amount of girls