Which is the best first step when solving the following system of equations?

x+y=3

4x-y=7

A Multiply the first equation by 4.

B Add the first equation to the second equation.

C Multiply the second equation by Negative 1.

What is the slope for the equation y = - 3x - 7

In ΔMNO, the measure of ∠O=90°, the measure of ∠M=39°, and MN = 5.3 feet. Find the length of NO to the nearest tenth of a foot.

What is 2 1/3 : 3 4/2=

Which property is demonstrated? 3[5 (4) ] + 3 = [3 (5) ]4 + 3 associative property of addition associative property of multiplication commutative property of addition commutative property of multiplication

What is the average rate of change from - 3 to 0

X and Y are independent random variables. X is normally distributed with mean 1 and variance 1. Y is normally distributed with mean 3 and variance 5. What is the variance of Y - 2X?

Simplify - 2/3 - 3/5.

Alive, Kathy and Sheila work as medical assistant at valley clinic. Alice has work 8 years longer than Kathy. Kathy has worked half as long as Sheila. If Sheila has worked at the company for 10 years how many years has Alice worked there?

A population of bacteria grows by a factor of 1.32 in one hour. What is the hourly growth rate?

An airplane took 4 hours to fly 2400 miles against headwind. The return trip with the wind took 3 hours. Find the speed of the plane in still air and the speed of the wind.