month weight (lbs)
january 13.5
february 12.5
march 10.5
april 11.2
may 11.2
june 10.8
july 9.5
august 13.4
september 11.5
october 11.8
heather recorded the weight of her cat sally for the past ten months. she is going to the vet this month. she is predicting that the cat's weight will be close to the mean of her data. about how much is she predicting that sally will weigh?
a) 8 lbs
b) 10.9 lbs
c) 11.3 lbs
d) 11.6 lbs

Step-by-step explanation:

The mean is the sum of the weights divided by the number of weighings.

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x