What is true about the dilation?

- it is a reduction with a scale factor between 0 and 1.

- it is a reduction with a scale factor greater than 1.

- it is an enlargement with a scale factor between 0 and 1.

- it is an enlargement with a scale factor greater than 1

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

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

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"