Let x represent the number. Write the English phrase as an algebraic expression.Seven times a number decreased by three-fourths of the same number.
A. 7(x - 
)
B. 
- 7x
C. 7x - 
D. 7x - 
Answer: C
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Use a tree diagram showing all possible results when four fair coins are tossed. Then list the ways of getting the indicated result.exactly two tails
A. hhtt, htht, htth, thht, thth, tthh, ttht B. hhtt, htht, htth, thht, thth, tthh C. hhtt, htht, htth, thth, tthh D. tthh
Provide an appropriate response.Solve the equation: -5x = 20
A. x = 
B. x = 4
C. x = -4
D. x = 25
Provide an appropriate response.Solve for the variable: 
+ 5 = 6
A. - 
B. 
C. 2
D. -2
Solve the problem.Rachel's bus leaves at 1:15 PM and accelerates at the rate of 3 meters per second per second. Rachel, who can run 8 meters per second, arrives at the bus station 5 seconds after the bus has left. Find parametric equations that describe the motions of the bus and Rachel as a function of time, and simulate the motion of the bus and Rachel by simultaneously graphing these equations.
A. Bus: x1 = 
t2, y1 = 2;
Rachel: x2 = 8(t - 5), y2 = 4
B. Bus: x1 = 3t2, y1 = 2;
Rachel: x2 = 8(t - 5), y2 = 4
C. Bus: x1 = 
t2, y1 = 2;
Rachel: x2 = 8(t + 5), y2 = 4
D. Bus: x1 = 3t2, y1 = 2;
Rachel: x2 = 8(t - 5), y2 = 4