What is the value of the expression x + (–y) when x = –3.8 and y = 1.7?
a. –5.5
b. –2.1
c. 2.1
d. 5.5

a deep sea diver’s depth is currently 30 m below the surface of the water.
which expressions represent a change in depth of d meters?
choose exactly two answers that are correct.
a. b.
c. d.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?