Amicroscope has a scale of 250: 1.

what does this scale mean?

A microscope with a scale of 250:1 means that the object looked at will appear to be 250 times bigger.

Step-by-step explanation:

Microscope are magnifying lenses used to view tiny things to make them bigger and more visible. The main function of a microscope is to magnify a tiny object or to magnify the little details of a larger object to examine minute specimens which the naked eye cannot see.

A microscope with a scale of 250:1 means that the object that is looked at will appear to be bigger by 250 times it's normal size.

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