Is 2.78778777 ... a irational number

In a triangle, two of the angles are equal. The third angle measures 80. What is the measure of the two congruent angles?

There are 7 people at a party. If every person brings one gift for each of the other guests, what is the total number of gifts at the party?

What is the exact circumference of a circle has a radius of 50 cm

Tan12=22 over x. Find x

Three-fourths was subtracted from a number, and then 5 was added to the result. The sum was - 7.

Mrs. Jacobsen purchased a 5-pound package of ground beef for $12.40. She decided to use 8 ounces each day for dinner recipes. What was the cost of ground beef per meal?

If (7^2) ^p = 7^6, what is the value of p? 2 3 4 8

The population at Saint Maria High increased from 1800 students ten years ago to 1926 students last year. What was the percent increase?

A triangle is placed in a semicircle with a radius of 7cm, as shown below. Find the area of the shaded region. Use the value 3.14 for π, and do not round your answer. Be sure to include the correct unit in your answer. 7cm

What can each term of the equation be multiplied by to eliminate the fractions before solving