Charlie runs at a speed of 3 yards per second . about how many miles per hour does charlie run?

6.14 miles/hour

Step-by-step explanation:

Charlie runs at a speed of 3 yards per second.

First we have to calculate the speed per hour in yards.

1 hour = 3600 seconds

In one second Charlie runs = 3 yards

in 3600 seconds he runs = 3600 × 3

                                          = 10,800 yards

Since 1760 yards = 1 mile

Hence, 10,800 yards =

                                   = 6.13636 ≈ 6.14 miles

Charlie runs at the speed of 6.14 miles per hour.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1