The side length of an equilateral triangle is 20 centimeters. Find the length of altitude of the triangle.

A rectangle has a perimeter Of 19 cm it's areas 21 cm² find its dimensions

Lia has 7 blue pencils and 28 red pencils. Maria has 14 blue pencils and 42 red pencils, and Tia has 10 blue pencils and 30 red pencils. Which girls have the same ratio of blue pencils to red pencils? Lia and Tia

What times what equals 92

Which student's answer most accurately describes the solution to the inequality x less-than negative 3?

The top speed of a peregrine falcon is 20 miles per hour less than three times the top speed of a cheetah. what is the cheetah's top speed?

Write 389,457 in words

What is 2 3 8 : 1 1 4 ? A) 10 19 B) 1 9 10 C) 2 3 32 D) 2 31 32

Evaluate 3+jk+k^33+jk+k 3 3, plus, j, k, plus, k, cubed when j=2j=2j, equals, 2 and k=6k=6k, equals, 6

Write a positive or negative integer an increase of $15

Why are the elements placed into groups/families?