Answer:
Lulu has 14 quarters and 6 dimes
Step-by-step explanation:
Let x be the number of dimes and y the number of quarters. The sum of quarters and dime is 20 coins. Then:
x + y = 20
We also know that the value of each dime is $ 0.10 and the value of each quarter is $0.25. The total value of the coins is $4.10. Then, the number of dimes times 0.10 plus the number of quarters times 0.25 will be 4.10:
0.10x + 0.25y = 4.10
So, we have a system of 2 equations and 2 unknowns:
x + y = 20
0.10x + 0.25y = 4.10
Let´s solve the first equation for y:
x + y = 20
subtract x from both sides
y = 20 - x
And now let´s replace y in the second equation:
0.10x + 0.25(20 - x) = 4.10
Apply distributive property
0.10x + 5 - 0.25x = 4.10
subtract 5 from both sides of the equation
-0.15x = -0.9
Divide by -0.15 both sides of the equation
x = 6
Now let´s calculate y:
y = 20 - x
y = 20 - 6 = 14
Lulu has 14 quarters and 6 dimes
Answer:
reerrthdthjfjffgyjhvg
Step-by-step explanation:
Reerrthdthjfjffgyjhvg because reerrthdthjfjffgyjhvg and reerrthdthjfjffgyjhvg, because it is reerrthdthjfjffgyjhvg.
Hope this helps! :)
Answer:
<h2>
m = -11</h2>
Step-by-step explanation:
y=mx+b =D
Answer: (D)
Step-by-step explanation: 24 square units
Well if the probability of getting a tail is 0.31 then the probability of getting a head must be 0.69 because 0.31 is much like 31% and the last 0.69 makes 69% resulting in the total 100% chance when combining the outcome chances seeing as a coin only has 2 sides. (Assuming we are speaking of an U.S. coin here) <span />