Answer:
Step-by-step explanation:
y = 0.80x + 2.50
a 7 mile ride......x = 7
y = 0.80(7) + 2.50
y = 5.60 + 2.50
y = 8.10 <=== the 7 mile ride cost $ 8.10
the ride cost 13.70.....y = 13.70
13.70 = 0.80x + 2.50
13.70 - 2.50 = 0.80x
11.2 = 0.80x
11.2 / 0.80 = x
14 = x <=== u travel 14 miles
Answer:
C) 66
Step-by-step explanation:
We must follow PEMDAS which stands for:
P- Parenthenses
E- Exponents
M- Multiplication left to right
D- Division left to right
A- Addition left to right
S- Subtraction left to right
Parenthenses: 4^3+2(1)
Exponents: 64+2(1)
Multiplication: 64+2
Addition: 66
So the correct choice is C
Answer:
1. Likely.
2. Unlikely
3. Unlikely
4. Neither
5. Likley
Step-by-step explanation:
Assuming the equation is 3x-2y+4=0 then the equation of the line, solving for y in terms of x, gives y=3/2x+2 the slope of this line is 3/2 then the slope of a line that is perpendicular is -2/3 .An easy way to see this is to draw the line. By definition the slope, m=tan(α) where α is the angle the line makes with the x axis. Let L=slope of the perpendicular line then L=tan(β) but the two lines with the x axis form a right triangle hence α+π-β=π/2 so β=π/2+α and L=tan(β)=tan(π/2+α)=-cot(α) = -1/tan(α)=-1/m.In our problem m=3/2 so L=-2/3.The geometry becomes clear if you make a sketch of the two lines. Hope this helps
