Respuesta :
Answer:
Step-by-step explanation:
X = number of nickels
Y= number of dimes
.5x + .10x + 5= .80
.15x +.50 =.80
Subract .5 from both sides and
Divide by .15 on both sides
x= 2 therefore you have 2 nickels
And you have 7 dimes
Hence 7 dimes are left.
What are quadratic equations?
A quadratic equation is any equation that can be rewritten in standard form as ax2+bx+c=0 in algebra. When x is an unknown and a, b, and c are known numbers, and an is less than 0. Because there is no ax2 term when a = 0, the equation is linear rather than quadratic.
How to Solve?
Given
X = number of nickels
Y= number of dimes
Hence equation becomes
.5x + .10x + 5= .80
.15x +.50 =.80
Subract .5 from both sides and
Divide by .15 on both sides
x= 2 therefore you have 2 nickels
Hence you have 7 dimes
Learn more about quadratic equations
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