A mural made of triangular tiles has an area of 1750 square centimeters. Each triangle has a
height that is 3 centimeters longer than its base
of 2 centimeters. How many triangular tiles are
there?

She should have asked more people.

Step-by-step explanation:

Given: Matilda asked 20 random people in the street if they would like to discuss what they want to do during the summer break.

Here sample size=20

We can see the sample is biased because the sample size is too small.

Through them we cannot decide the answer of the population.

She should have asked more people in the street if they would like to discuss what they want to do during the summer break. Then she need to make a list of their answers in approach to the answer.