Answer:$67.10
Step-by-step explanation:
Using the first statement we can generate the equation c= 0.18m + 10.4 where c is the cost and m is the number of minutes. So if you make 315 minutes of call then input that for m and solve for c.
c= 0.18(315) + 10.4
c= 67.10
Answer: 1) 300 min
2) 680 min
Step-by-step explanation:
1) As the charge was $21 at 0.07, x is the minutes he used, we have:
0.07x = 21
x = 21/0.07
x = 300
2) As the charge was $40 and the company charges different rates for minutes, we know from 1 that the first 300 min costs $21, we have
40 - 21 = 19
So $19 was charged with the $0.05 fee. so:
0.05x = 19
x = 19/0.05
x = 380
300 + 380 = 680 min
Answer:
I think its Symmetric Property.
Step-by-step explanation:
Answer:
2x³-3x²+4
Step-by-step explanation:
F(x) = 2x-1
g(x)=x²-2
g.f(x) = (x²-2)(2x-1)
open the bracket
x²(2x-1)-2(x²-2)
2x³-x²-2x²+4
2x³-3x²+4
Answer:Given a rectangle, the general equation for the perimeter is P=2l+2w and area is A=lw where l is the length and w is the width.
Let x = width and x+10 = length
So the equation to solve becomes 40=2x+2(x+10) so x=5 thus the width is 5m and the length is 15m.
Thus the area is 5⋅15=75m2
Step-by-step explanation: