The expression 5x2 + 2x + 3 represents the area of a square. The area of rectangle is represented by 2x2 + 3x + 1. Which expression represents th
combined area of the square and rectangle?
a. 7x4 + 5x2 + 4
c.7x2 + 5x + 4
b. 3x4 - x2 + 2
d. 3x2 - x + 2

Step-by-step explanation:

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."