Write the following as an equation, using x for the unknown number. Then solve.If 4 times a number is added to -7, the result is equal to 11 times the number. Find the number.
A. 15x - 11x = 7; 1
B. 4x + (-7) = 11x; -1
C. 11(4x - 7) = -7; -1
D. 4x + (-7) = 11x; 1
Answer: B
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Solve.The speed of a stream is 6 mph. If a boat travels 94 miles downstream in the same time that it takes to travel 47 miles upstream, what is the speed of the boat in still water?
A. 20 mph B. 12 mph C. 18 mph D. 21 mph
Graph the linear equation. Give the x- and y-intercepts.y = - 3
A. x-intercept: (- 3, 0); y-intercept: none
B. x-intercept: none; y-intercept: (0, 3)
C. x-intercept: none; y-intercept: (0, - 3)
D. x-intercept: (0, 0); y-intercept: (0, 0)
Solve. Provide answers in interval notation.(x + 9)(x - 4)(x + 2) > 0
A. (-9, -2) ? (4, ?) B. (-9, -4) ? (2, ?) C. (-?, -9) ? (2, 4) D. (-?, 4) ? (2, 9)
Provide an appropriate response.Is it true that in order to multiply a number by a negative power of ten, you must move the decimal point to the left as many places as indicated by the absolute value of the exponent on the ten?
A. Yes B. No