What formula can you use to find the nth triangular number

An employee of a car wash earns $12 for each car she washes she always saves $50 of her weekly earnings this when she wants to have at least $100 in spending money what is the fewest number of cars she must wash

100 is divisible by which of the following numbers 2, 3, 4, 5, 6, 9, or 10? A.) 2, 3, 4, and 6 B.) 2, 4, 5, and 10 C.) 5 and 10 D.) 2, 4, 6, and 10

What is 119% as a fraction in simplest form?

What the square root of 45?

Measure the circumference and diameter of 10 circular items. record on table. divide the circumference by the diameter. record.

3 (1.4*10^6) multiply or divide. write tje answer in scientific notation

The period of F (x) = 2 cos x is

A city block has 3 stores and a 20 foot mural on one side of the street. On the other side of the street there are 5 stores. If all the storefronts are equal length, what's the length of the city block?

Во время прогулки папа сделал 16 снимков.

Suppose someone tells you that she has a triangle with sides having lengths 2.6, 8.1, and 8.6. Is this a right triangle? Why or why not? Is there an angle in the triangle larger than 90 degree?