Answer:
14 quarters and 28 nickels
Step-by-step explanation:
System of Equations where x = number of quarters and y = number of nickels
(1) equation with value of each coin
0.25(x)+0.05(y) = 4.90
(2) total number of coins
x + y = 42
Solve system of equations using either substitution or elimination
(elimination multiplying equation 2 by -0.5)
.25(x) + 0.05(y) = 4.90
-0.05(x) - 0.05(y) = 42 * (-0.05)
(3) Resulting equation
.20(x) = 2.8
x = 14
plug x into equation 2
14 + y = 42
y = 28
There are 14 quarters and 28 nickels in Mary's collection.
The formula of find the slope is -0.4285
use y2 - y1 over x2-x1
The correct answer is 70 because 420 divided by 6 is 70.
<span>54*8+6+14
Multiply 54 by 8
432 + 6 + 14
Add 6 to 432
438+14
Add
Final Answer: 452
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Answer:
3x²+12x
Step-by-step explanation:
Expand the brackets
