How do I solve this system of equations?

-3x-4y-3z=-7

2x-6y+2z=3

5x-2y+5z=9

What is the measure of angle BAC? Round to the nearest whole degree.

The table below shows the dolphin population in an area in 1990 in 1995. Year | # of dolphins 1900-147 1995-196 Based on a linear model what will be the approximate dolphin population in 2015?

Jennifer is 6 years older than her brother. Two years ago she was four times as old as her brother. What equation describes this problem?

the daily supply of oxygen for one person is provided by 625 square feet of lawn. a total of 5625 square feet of lawn would provide the daily supplies of oxygen for how many people?

In a 4 x 3 factorial design, there are how many levels of the first grouping factor?

A deposit of $5,000 is made into a savings account that offers 7.5% annual interest. Which equation models the amount of money in the account after t years? P (t) = 5,000 (1.75) t P (t) = 5,000 (1.075) t P (t) = 5,000 (0.925) t P (t) = 5,000 (0.

5n = - 20. How do I solve this equation?

One and one half pounds of chocolate are eaten by 5 people. If each person eats the same amount, find the unite rate in pounds of chocolate per person

Score: 0 of 1 pt 7.4.41 From a standard 52-card deck, how many 5-card hands consist entirely of black cards?

The puzzle company packs standard sized puzzels into boxes that hold 8 puzzeles how many boxes would it take to pack up 192 standard sized puzzles