Andy's age = x
Jeff's age = x-2
Andy's age in five years = x+5
Jeff's age in five years = x-2+5
The sum of their ages in five years = x+5 + x-2+5

 x + 5 + x - 2 + 5 = 40
 2x + 8 = 40
 -8 -8
 2x = 32
 :2 :2
 x = 16
x - 2 = 14

Andy is 16 years old and Jeff is 14 years old

8 0

2 years ago

Solve by completing the square, x^2 + 6x - 6 = 0

MArishka [77]

Answer:

X= 6.87298334

3 0

2 years ago

Find the volume of the sphere shown to the right. Give an answer in terms of pi and rounded to the nearest cubic unit.

Vladimir [108]

The correct answers are:
Exact volume = $V = \frac{32}{3} \pi$ in^3
Approximate volume = V = 33.51 in^3

Explanation:

The volume of the sphere is: $V = \frac{4}{3} \pi r^3$

Since r = 2 in

Hence
$V = \frac{4}{3} \pi (2)^3 \\ V = \frac{32}{3} \pi$ in^3 (exact)
V = 33.51 in^3 (approximate)

5 0

2 years ago

A bag contains 42 red, 45 green, 20 yellow, and 32 purple candies, you pick one candy at random, find the probability that it is

Gnesinka [82]

Answer:

P (green/yellow) = 65/139

Step-by-step explanation:

42 + 45 + 20 + 32 = 139 possibilities

45 + 20 = 65 desired outcomes

65/139

Hope this helps!

3 0

3 years ago