Slope intercept form isy=mx+b
m=slope
b=y intercept
ok so to find the slope when given 2 points you do
slope=(y1-y2)/(x1-x2)
(x,y)
(-1,-9)
(2,6)
x1=-1
y1=-9
x2=2
y2=6
subsitute
slope=(-9-6)/(-1-2)
slope=(-13)/(-3)
slope=13/3
y=13/3x+b
subsitute a given point to find b
(2,6)
x=2
y=6
6=13/3(2)+b
6=26/3+b
subtract 26/3 from both sides
6-26/3=b
6=18/3
18/3-26/3=8/3
8/3=b
the equation si
y=(13/3)x+8/3
Answer:
$107.38
Step-by-step explanation:
$91 (the price) multiplied by the percentage 18% (91 x 18 = 1630) (1638/100=16.38 [the tip})
$91 (th original price) + 15.38 (the tip) = $108.38 (final price)
Answer:
b. n-4
Step-by-step explanation:
a number=n
4 less than it =n-4
Answer:
The area of trapezoid is 32 inches^2
Step-by-step explanation:
Parallel base 1 = a = 3 inches
Parallel base 2 = b = 5 inches
Height of trapezoid = 8 inches
We need to find area of trapezoid
The formula used is: 
Now putting the values and finding area of trapezoid
So, the area of trapezoid is 32 inches^2
Remark
It is really hard to tell what the playground is. Is he running around 45 yards plus the circumference of part of the circle? Or is just the triangle? Since pi is mentioned, I'll take it to be 45 + part of the circumference, but the ambiguity makes it possible to be wrong.
Equation
Distance = 2* (280/360) * pi * r + 45
Givens
r = 35 yards
Solve
C = 2 * 3.14 * (280/360) * 35 + 45
C = 2 * 3.14 * (0.77777777) * 35 + 45
C = 6.28 * 35 * 0.777777 + 45
C = 170.9555556
Answer
C = the distance for 1 lap around the playground. David went around 3 times.
3*C = 3 * 170.95555556
3C = 512.8666667
The distance he went is 513 yards <<<< Answer
