Determine whether the given value is a solution to the given equation.Is -4 a solution of 9.5x = -38?

A. Yes
B. No

Answer: A

Mathematics

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Is the set of odd natural numbers closed for the operation of multiplication? ?

A. yes  B. no 

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Find an equation of the inverse relation.x3y = -8

A. y3 = -8
B. y3x = -8
C. x3 = 
D.   = -8

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Mathematics

Write the expression in the form a + bi.

A.  - i
B. 1 - i
C.  + i
D.  - i

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Mathematics

Solve the problem.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 757. Find a linear function S(t), which fits this data, and which expresses score as a function of time.

A. S(t) = -3.425t + 517.25 B. S(t) = 3.0825t + 521.25 C. S(t) = 3.0825t - 521.25 D. S(t) = 3.425t + 517.25

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Mathematics