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Eduardwww [97]
3 years ago
13

Mitchell has only quarters and dimes in his piggy bank the last time he counted his money he had a total of 85 coins that equal

$16.75 write a system of equations to model Mitchell’s situation. Solve the system of equations to find the number of quarters and dimes
Mathematics
2 answers:
julsineya [31]3 years ago
8 0

Answer:

55 quarters, 30 dimes

Step-by-step explanation:

x: quarters

y: dimes

x + y = 85

0.25x + 0.10y = 16.75

Multiply first equation by 0.10 and subtract the two equations.

0.10x + 0.10y = 8.50

-(0.25x + 0.10y = 16.75)

-0.15x = -8.25

x = 55

now plug this x-value into the first equation.

x + y = 85

55 + y = 85

y = 30

postnew [5]3 years ago
7 0
Qx + Dx = 16.75

Q= Quarters
D= Dimes
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Answer:

vertex form is y=a(x−h)2+k. To solve this you have to complete the square with the x terms: y= 3x2−12x+4. first isolate the x terms: y−4=3x2−12x. ax2+bx+c to complete the square a=1 and c=(12b)2.

Step-by-step explanation:

vertex form is y=a(x−h)2+k. To solve this you have to complete the square with the x terms: y= 3x2−12x+4. first isolate the x terms: y−4=3x2−12x. ax2+bx+c to complete the square a=1 and c=(12b)2.

5 0
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The equation of the line of best fit for a scatter plot is yˆ=−14x+10 where x is age in years and y is average number of hours o
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