Answer:
0.05x+0.25y=8.75; the y intercept represents that if she found 0 nickels she must have found 35 quarters.
Step-by-step explanation:
1. Solve for y:
0.25y= 8.75-0.05x (subtract 0.05x on both sides)
y= (8.75-0.05x)/0.25 (divide by 0.25 on both sides)
2. Since the y intercept can be found when x equals 0, plug in 0 for x into the equation.
y=(8.75-0.05(0))/0.25
y= 8.75/0.25
y=35
The sign of the term in x^2 is negative so the graph will open downwards.
when x = 0 y = 1
The coordinates of the vertex are (0,1)
the maximum value of the function is 1
and the axis of symmetry ix x = 0 ( the y axis)
Answer:
1st question: M=22.62 while C=75.38
2nd question: M=.22 while C=1.97
Step-by-step explanation:
If a mirror costing x dollars is marked up 30%, then we have to find x such that 30%x+x is 98 dollars.
We are solving:
.3x+x=98
Combine like terms:
1.3x=98
Divide both sides by 1.3:
x=75.38
M=98-75.38=22.62
C=75.38
So M=22.62 while C=75.38.
If ream of paper cost x and is marked up 11%, then we have to find x such that 11%x+x is 2.19.
We are solving:
.11x+x=2.19
1.11x=2.19
x=1 97
M=2.19-1.97=.22
So M=.22 while C=1.97
