How to use substitution for 4x+3y=13 and x+y=4

I am a multiple of 5, but not a multiple of 10. My units and hundreds digits are the same. The sum of my three digits is 11.

A $1,000 TR Global bond at 80.5 pays 6% interest. Find the annual yield

Can we have a repeating number in a fraction? For example, repeating 54 over positive 6.

WHich of the following statements is always false when x=3, y=2, and z=4

The amount $3.80 is 4% of what price? $7.80 $15.20 $95.00 $97.20

Prove that there exists a unique prime number of the form n2 - 1, where n is an integer that is greater than or equal to 2.

There are 70 high school students attending the annual Johnson High School junior and senior dance. Of the 70 students attending, 30 of the are girls, 24 of the students are seniors, and 6 of the girls are seniors.

What polynomial identity proves that 64 + 27 = 91?

True or False: A rectangular equation that is not a function may be a function in the polar coordinate system

1. What's the area of the above figure, which has sides of length 6 and 8? A. 28 B. 42 C. 14 D. 48