We will use either L6 or R6 for the upper and lower estimates. Since the runner's speed is an increasing function, then Incorrect: Your answer is incorrect. will give the lower estimate, and Incorrect: Your answer is incorrect. will give the upper estimate.

its 60

4 x 12 = 48

3 x 4 = 12

48 + 12 = 60

yeeeet

x = 2

step-by-step explanation:

if sr parallel to ba then the sides bc and ac are in proportion, that is

= ← substitute values

= ( cross- multiply )

27x = 6(4x + 1)

27x = 24x + 6 ( subtract 24x from both sides )

3x = 6 ( divide both sides by 3 )

x = 2

b

step-by-step explanation: