What is the sum of these two equations? 2x+3y-z=5, x+3y+2z=-6

Simplify the expression. 4/5 n - 3 + 7/10 n

9 Determine whether each pair of the following sets is an equal set or not. (a) M = {prime factors of 8}; N = {prime factors of 32}

Calculate the proportion of classrooms that indicated an interest in participating. Round to the nearest thousands

I'll give brainliest to whoever answers first. Howard is sitting in a dinghy at an elevation of 0.8 meter relative to sea level. His friend Peter is snorkeling at an elevation of - 1.1 meters relative to sea level.

Gina wants to ride the waves at flagship Pier in Galveston so she she rents a surfboard for $5 and hour plus an initial or beginning payment of $20 for how many hours can Gina rent a surfboard if she has $90

while playing basketball, jada's heart rate goes up to 160 beats per minute. whe jogging her heart beats 25 times in 10 seconds.

What does 12 times a number mean as an expression?

Emma seys that the preduct of a 3-digit number and a 1-digit number will be either a 3 digit number or a 4 digit number. Does Emma's statement make sense

Work out the value of these two questions: 1) 3^2 + 2^3 2) 2^4 - 3^2

What is 5 1/4 divided 2 2/7