<span>Average speed = distance over time so here
Speed = (22 1/2) / (1/3) = 67 1/2 miles per hour</span>
Answer:
AE = 18 units
Step-by-step explanation:
Δ AEB and Δ DEC are similar , then corresponding sides are in proportion, that is
= 
, substitute values
= 
( cross- multiply )
10(2x + 4) = 12(x + 8) ← distribute parenthesis on both sides
20x + 40 = 12x + 96 ( subtract 12x from both sides )
8x + 40 = 96 ( subtract 40 from both sides )
8x = 56 ( divide both sides by 8 )
x = 7
Then
AE = 2x + 4 = 2(7) + 4 = 14 + 4 = 18 units
Because division is repeated subtraction.
For example: "10 divided by 2" means "How many times can you
subtract 2 from 10 before the 10 is all gone ?".
When you divide a whole number by ' 1 ', you're trying to find out
how many times you can subtract ' 1 ' from the whole number.
Of course, the answer is the whole number itself.
Now, when you divide a whole number by a piece less than ' 1 ',
you're trying to find out how many times you can take a piece of ' 1 '
away from the whole number. Of course THAT will be more times
than the whole number itself.
Answer:
w=width
l= 2w-4
perimeter of a rectangle = 34
34 = 2(2w-4+w)
34 = 4w-8+2w
34 = 6w-8
6w = 34+8
6w = 42
w = 42/6
width = 7
length = 2w-4
= 2(7)-4
= 14-4
= 10
