What formula can you use to find the nth triangular number

12) Josh has $252 in his bank account. This is $12 more than 6 times the amount of money that Sally has in her account. Write and solve an equation to determine how much money Sally has in her account.

Y varies directly y a x. if x = 5 when y = 122 find x when y=30

There are 8 juice boxes in the refrigerator. Each box holds cup of juice. How many cups of juice are in the refrigerator? A student solved the problem this way: There are 6 cups of juice in the refrigerator.

You have $40 to spend on n gallons of gas that costs $3.25 per gallon. Determine whether each of the folloyis an expression or an equation. Using the structure, give an interpretation of the practical meaning of each

Ms. Adams shares out 40 pencils between Niamh and Jack in the ratio 3 : 7 How many pencils does Niamh get Jack get

What is the median of the data set? 87, 98, 106, 82, 111, 120 a. 98 b. 102 c. 106 d. 94

Which fraction is equivalent to : 3/8 + 1/8

Why do we never accept the null hypothesis or the research hypothesis? (instead we either reject or fail to reject) ?

What is 9,632 rounded to the nearest thousand

Write a quadratic equation in standard form -3x^2+x=13