Thus is how you write y=2x-7 in a function notation. ANSWER:F(x)=2x-7.
N+d=34
.05n+.10d=2.60
Solve by substitution
n=34-d
.05(34-d)+.10d=2.60
1.7-.05d+.10d=2.60
.05d=.90
d=18 dimes
18+n=34
n=16 nickles
B = rw+ r
Factor the right side:
b = r (w + 1)
Divide each side by ' r ' :
b/r = w + 1
Subtract 1 from each side:
b/r - 1 = w
Slope is 2/6 also 1/3
Y=Mx+b
5=1/3*-9+b
5=-3+b
b=8
So the equation is y= 1/3x +8
(a) The y-intercept is when x=0, so the answer is (0,3).
(b) Perpendicular lines have gradients that multiply to -1, so the gradient of B is 1/4.
So, the equation is y = ¼x + 3.
