Answer:
B 15
Step-by-step explanation:
10 dollar + 2 hours of work 15 x 2
-8x+4=36
-4 -4
-8x=32
divde be -8 on both sides
x=-4
Answer:
6.7
Step-by-step explanation:
1^2+1^2= root 2
4^2+7^2 = root 65
1/2*root 2 *(root 65/2) = 2.85*2=5.700877+1
=6.7
Answer:
k = 9
Step-by-step explanation:
Given

Required
The perfect number
The coefficient c of x in the above equation is:

Divide by 2

Square both sides

Hence, the constant to add is:

The northbound car has traveled a distance of 6.2 miles.
Step-by-step explanation:
Step 1:
The eastbound car has traveled a distance of 5 miles and if a straight line is drawn between the two car's positions it would measure 8 miles.
This forms a triangle which has a hypotenuse measuring 8 miles while one of the other sides measures 5 miles.
Assume the distance traveled by the northbound car is x miles.
Step 2:
According to Pythagoras' theorem,


So the northbound car has traveled a distance of 6.244 miles. Rounding this off, we get 6.2 miles.