4b - 6b + 19
Answer : -2b + 19
The units of speed are miles per hour. You get that by dividing miles by hours:
(270 mi)/(4.5 h) = 60 mi/h
For the first line we have a slope of (y2-y1)/(x2-x1)
(2--2)/(1--1)=4/2=2 so we have:
y=2x+b, now solve for b with either of the points, I'll use: (1,2)
2=2(1)+b
b=0 so the first line is:
y=2x
Now the second line:
(1-10)/(4--2)=-9/6=-3/2 so far then we have:
y=-3x/2+b, using point (4,1) we solve for b...
1=-3(4)/2+b
1=-6+b
b=7 so
y=-3x/2+7 or more neatly...
y=(-3x+14)/2
...
The solution occurs when both the x and y coordinates for each are equal, so we can say y=y, and use our two line equations...
2x=(-3x+14)/2
4x=-3x+14
7x=14
x=2, and using y=2x we see that:
y=2(2)=4, so the solution occurs at the point:
(2,4)
To solve, we must get x by itself. the first step we must take is to remove all of the parentheses. To do this, we must use distribution to multiply 5 by x - 6.
5(x - 6) = 3x - 18 + 2x
5x - 30 = 3x - 18 + 2x
Next, we must add like terms.
5x - 30 = 5x - 18
Finally, we must get x by itself. to do this, we must subtract 5x from both sides.
5x - 30 - 5x = 5x - 18 - 5x
Then, we add like terms again.
-30 = -18
Because this is a false statement, the equation is a contradiction.
Answer:
68 your welcome
Step-by-step explanation:
407/6 is 67 and some remainder
so 68 pages
