David told Jen, "Write three two-digit numbers. I'll add three more and give you the sum right away." Jen wrote 53, 42, and 31. Then David wrote 46, 57, and 68 and said the sum was 297. Was he right? What pattern did he use?

What is the missing mention of a rectangular prism with the volume of 40 cm³

grant want to buy a T-shirt for 9.75 and shorts for 11.29. He wants to pay with one $20 bill use estimation to decide if this is reasonable. explain to what place value to round for an estimate that is useful in this situation.

Mo-Qui has studied Spanish for half an hour longer than he studied History. If He spent 2 hours and 15 min studying for Spanish, but isn't finished yet, write an inequality to show how the amounts of time studying each subject are related.

Modelthe producton the grid 5*13=

840 divided into 10000

Which statement is true about the equation (x - 4) (x + 2) = 16? >The equation x - 4 = 16 can be used to solve for a solution of the given equation. >The standard form of the equation is x2 - 2x - 8 = 0.

Five workers are hired to seed a field by hand. Each is given a plot which is 6x12 feet in size. What is the total area of the field?

Wrote and solve an equation to find the number. The difference of twice a number and 7 is 9

Concert marketing: The college's performing arts center wanted to investigate why ticket sales for the upcoming season significantly decreased from last year's sales. The marketing staff collected data from a survey of community residents.

Which equation represents the sentence? Eight less than a number is one-third the number. 8 - n = n/3 n - 8 = 3n n - 8 = n/3 n/3 - 8 = n