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DOes anyone know how to do this Step by step

In a test + 3 marks are given for every correct answer and - 1 mark for every incorrect answer. Sona attempted all the questions and scored + 20 marks through she got 10 correct answers. How many questions were asked?

A submarine is at 756 feet below sea level how many feet will it need to rise to be at the surface?

There are 4 teams in a basketball league. Each team plays each of the other teams three times. How many games are played?

Simplify by combining like terms - 4 + 5x - 17 - 22x

When Margo makes cheese ravioli, she uses both ricotta and mozzarella cheeses to make the filling. She often varies the proportions of the cheeses that she uses, but the number of ounces of ricotta cheese, r, is always more than 3 times the number

You drive 70 miles per hour but then slow your speed by 15 miles per hour. you then return to your speed of 70 miles per hour. which expression shows how your speed changed?

Given r = 8 and ø=1.85pi, find the Cartesian coordinates. Check your answer. a. (7.13, - 3.63) C. (-7.08, 3.67) b. (7.08, - 3.67) d. (-7.80, - 3.67)

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. The solution set of n2 - 14n = - 45 is [ ]

Peter is 2 years older than Winnie. Peter's age is 16 years less than seven times Winnie's age. The equations below model the relationship between Peter's age (p) and Winnie's age (w): p = w + 2 p =

Name a fraction equivalent to 2/3