2. let f: a → b and g: b c be functions. prove or disprove each of the following: (a) if both f and g are one-to-one then go f is one-to-one. (b) if go f is one-to-one then f is one-to-one. (c) if go f is one-to-one then g is one-to-one. (d) if go f is one-to-one and f is onto then g is one-to-one.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)