The number of bricks on the bottom row was 21, and each row above it had 2 fewer
bricks. If there were 11 rows in the stack of bricks, how many bricks were there altogether?

121

Step-by-step explanation:

21-2x

add all of the sums from 0 - 11

image result for what is another name for consecutive interior angles? ​

when two lines are crossed by another line (called the transversal): the pairs of angles on one side of the transversal but inside the two lines are called consecutive interior angles. in this example, these are consecutive interior angles: d and f.

step-by-step explanation:

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.