Answer:
r = 2.5
Step-by-step explanation:
x is directly proportional to y. This can be written as,
x ∝ y
In terms of constant, the proportionality can be written as,
x = ry
Where r is the constant. The table has a set of values for x and y. Let's substitute the values in the first row into the equation with the constant.
10 = r × 4
r = 
r = 2.5
Lets check with the second row.
12.5 = r × 5
r = 
r = 2.5
Since both sets of values have the same answer for the constant, this means that the third row of values should probably have the same constant.
r = 2.5
Answer:
5 problems
Step-by-step explanation:
20=%80
10=%40
5=%20
100-80=20
20+5=25
5 problems left
Answer:
-123c + 23
Step-by-step explanation:
1. <em>First you need to distribute the negative sign to the second binomial</em>
(23 - 8c) - (5c - 1)
(23 - 8c) (-5c + 1)
2. <em>Distribute each term in the first binomial to each term in the second binomial, FOIL (first, outer, inner, last)</em>
(23 - 8c) (-5c + 1)
-115c + 23 + -8c
3. <em>Combine the like terms</em>
-115c + 23 + -8c
-123c + 23
hope this helps!
And, the factors of 64: 1,2,4,8,16,32 and 64
40: 1,2,4,5,8,10,20 and 40
Unit walking rate in miles per hour = 5 2/3 / 2 2/3 = 17/3 / 8/3 = 17/3 x 3/8 = 17/8 = 2 1/8 miles per hour.
Unit walking rate in hours per mile = 1/ 17/8 = 8/17 hours per mile.
