Which of the following statement is true? a. Two adjacent angles can be complementary
b. Two adjacent angles cannot be supplementary
c. An acute angle cannot be adjacent to an obtuse angles
d. Two right angles cannot be adjacent angles

This is another way of saying two angles next to each other add to 90 degrees. In other words, two angles touching each other forming a corner.

Two adjacent angles can be supplementary, so choice B is false.

An acute angle is always adjacent to an obtuse angle, so choice C is false.

Two right angles can be adjacent, and they would form a straight (180 degree) angle, so that's why choice D is false.

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18