In a test contains 10 questions, +3 marks are given for every correct answer and -1 mark are given for every incorrect answer. Sona got 7 correct answers and 3 wrong answers. What is her total score? Please help guys I have given 13 points!

Plsss help

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is x and y intercepts for y=x+7