Solve the problem.Susan has been working on a job that will require 45 hours to complete. If she has completed  of the job, how many hours has she worked?

A. 40 hours
B. 20 hours
C. 5 hours
D. 4 hours


Answer: A

Mathematics

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Use multiplication to check the answer. If an answer is incorrect, find the correct answer.

A. Correct B. Incorrect; should be 951 C. Incorrect; should be 950 R26 D. Incorrect; should be 950 R22

Mathematics

First rewrite the quadratic function in standard form by completing the square, then find any x-intercepts and any y-intercepts.f(x) = -x2 + 19x - 90

A. No x-intercepts; y-intercept: -90 B. x-intercepts: -9 and -10; y-intercept: 90 C. x-intercepts: 9 and 10; y-intercept: -90 D. x-intercepts: 9 and -10; y-intercept: 19

Mathematics

Simplify the expression using the imaginary unit i.

A. -18i 
B. 18i 
C. -i
D. ±18

Mathematics

Write the ratio in fraction notation.A baseball team has played 7 games so far this season. The team won 4 games. What is the ratio of games won to games played so far?

A.
B.
C.
D.

Mathematics