eight times any triangular number, plus 1, is a square number. show that this is true for the first four triangular numbers

Nelly was born x years ago. Which of the following expressions shows how old Nelly will be in four years?

What is 22/7 * 49/2 * 49/2

Of the 756 students in Jacob's middle school, 44% participate in sports, 29% play in the band, and 37% take the bus to school. How many students in Jacob's middle school play in the band? Eplain your reasoning.

Catherine has $400 in her checking account. She writes a check for $600. What is the balance in her account? -$1,000 -$200 $1,000 $200

Jazzmin has 2/5 of a pie. How many 1/10's of a whole pie are there in 2/5 of a whole pie?

Dose a triangle have a perpedicular lines, parallel lines, and intersecting lines

The histogram represents the distributions of essay scores for high school sophomores and juniors in a contest. Which statements are true about the data used to create the histogram? Select three options.

What is the gcf of 7x^2, 7x and - 28

A soccer player kicks the ball to a height of 1 meter inside the goal. The equation for the height, h, of the ball at time, t, is h=-4.9t^2-5t+2. Find the time the ball reached the goal.

Bowl contains 8 red balls, and 7 blue balls, and you draw 4 balls. In how many ways can the selection be made so that at least one of each color is draw?