To find the nth triangular number you can use this rule:
nth triangular number = " (n + 1)
Example: 4th triangular number =
(4 + 1)
= 10
a)
Find the 12th triangular number.
b)
Find the 50th triangular number.

The system of equations graphed below has how many solutions?

Solve the system of equations. y= 2x y= x^2 - 15

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test