Which equation and graph match this situation hector collects rainwater in a large barrel that weighs 15 pounds. when there are 10 gallons of water in the barrel, the total weigh of the barrel and the water is 98.4 pounds. when there are 20 gallons of water, the total weight is 181.8 pounds

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

Do, h = (7, 9) (14, 18) the scale factor is

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?