15y...for 12 months = 15(12) = 180 <==
Answer:
C. (1,-2)
Step-by-step explanation:
The solution to a system of equations is where the graphs intersect.
The graphs intersect where x = -1 and y = -2
This is the concept of application of quadratic equations; To get the number of dimes and quarters we proceed as follows;
suppose there are x dimes and y quarters;
x+y=95.......i
but we know;
$0.1=1 dimes
$0.25=1 quarters
thus
0.1x+0.25y=23.45.....ii
solving equation i and ii by substitution we shall have:
from i;
x=95-y
thus substituting the value of x in equation ii we get
0.1(95-y)+0.25y=23.45
9.5-0.1y+0.25y=23.45
collecting like terms we get:
0.15y=13.95
dividing both sides by 0.15 we get;
y=13.95/0.15=93
x=95-93=2
therefore we conclude that there were 2 dimes and 93 quarters
Y = -2/3x - 1/2 is a linear function because the power of x is 1.
You’re answer is b.
i did this already
