Answer:
38.5 years old
Step-by-step explanation:
Let us represent Mrs.Kelly's age with the parameter (k). It is given that her brother is (15) years younger than her, thus his age is (k - 15). It is given that the sum of their ages is (62). Therefore one can form an equation with the given information and solve for the unknown.
(Mrs.Kelly's age) + (Brother) = (62)
Substitute,
(k) + (k - 15) = 62
Simplify,
k + k - 15 = 62
2k - 15 = 62
Inverse operations,
2k - 15 = 62
2k = 77
k = 38.5
If all were triangles, he would have used 12*3 = 36 matchsticks. He used 5 more than that. Since each square adds 1 matchstick, ...
Daniel made 5 squares.
Answer:
1:4; C
Step-by-step explanation:
If you roll two cubes, they have 6 sides meaning 6 is the highest number. That's 2 more then 4 so I will subtract to two from each which makes it certain I will roll two dice less then 4. Removing two from each is 4 ergo the answer is 1:4
Answer:
$16,748
Step-by-step explanation:
we know that
The equation of a exponential decay function is equal to
where
y is the value of the car
x is the number of years
a is the initial value
r is the rate of change
In this problem we have
substitute
For x=3 years
substitute