Solving systems

2x+y=1

x+y=1

Simplify the expression. 5y-6x^2-5-1

A safe has a 4-digit lock code that does not include zero as a digit is repeated. What is the probability of a lock without all even digits?

0.09y2 - 0.81 cant be factored right? because im bout 4.3 seconds from slappin tf out my teacher.

Which number produces a rational number when added to 1/4

Which list includes all of the factors of 24

How many 20 make 88 dollars

In a right triangle, a and b are the lengths of the legs and c is the length of the hypotenuse. If b = 77 centimeters and c = 85 centimeters, what is the perimeter? If necessary, round to the nearest tenth.

What are the first two terms of the sequence defined recursively by the formula an = (an-1) ^2+4 when a4=1604 A. 2, 8 B. 6, 40 C. D.

Erin filed for chapter 7 bankruptcy when she was 25 years old. How old will she be when the bankruptcy is removed from her credit report?

How many pairs of sides touch each other in a rectangle of 4 squares with 2 rows