Answer:
B. Exactly one solution
Step-by-step explanation:
You can add (4x -8) to both sides:
5x +8 -7x +(4x -8) = -4x +1 +(4x -8)
Collect terms
2x = -7
x = -7/2 . . . . . divide by 2. One solution.
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As soon as you determine that the x-coefficients on the left and right are different, you know there is exactly one solution.
On the left, the coefficient of x is 5-7 = -2; on the right it is -4.
Answer:
-16-22-23= -61
Step-by-step explanation:
Hope it was helpful .
Answer:
A factor of 0.2
Step-by-step explanation:
If we multiply 2.5 by 0.2, we get 0.5, the width of the smaller rectangle.
Answer: The wheel make 315 complete revolutions in one minute
Step-by-step explanation: Given speed of convertible =45 miles/hr
To answer this question you will need to know how many inches the car travels Per minute.
1. To find this out you will first divide 45 miles by 60 to get the number of miles per minute.
The convertible travels 0.75 mi./min.
2. Next you will convert this number of miles to inches.
There are 63,360 inches per mile.
0.75 x 63360 = 47520 inches per minute.
3. You then need to find the distance the wheel travels in one rotation. You will need to find the circumference of the wheel.
C = pi x d
3.14 x 48
C = 150.72 inches
Each rotation is about 150.72 inches.
4. Finally, divide the total distance traveled in a minute by the circumference(distance of one rotation) to get the total number of rotations in a minute.
47520/150.72 is about 315.3 rotations per minute.
