Answer:
30 years old
Step-by-step explanation:
Joe's age can be set to x. Since Billy is twice as old as Joe, his age can be set to 2x. They add up to 45. You can set up an equation, 2x+x=45.
Simplify the equation.
3x=45, x=15
Joe is 15. Billy is 2(15)=30.
Answer:
105
Step-by-step explanation:
The numbers that can be used to form triangles are collectively called "triangle numbers." The n-th triangle number is the sum of all numbers less than or equal to n. It is ...
n(n+1)/2
For n=14, the number is 14(15)/2 = 7·15 = 105.
The clerk used 105 oranges to make the arrangement.
Answer:
i see a select where's the choises
Answer:
y = -1/3x - 4
Step-by-step explanation:
slope is change in y over the change in x
-3 + 5 = 2
-3 - 3 = -6
slope is -2/6 or -1/3
y+3 = -1/3 (x + 3)
y + 3 = -1/3x -1
y = -1/3x - 4
