4x + 4y + 2z = 8

x - y - z = 0

4y - 2z = - 15

x = 2, y = - 2, z = 4; (2, - 2,4)

Is (2,-2,4) a solution of the system of equations? Yes or no?

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If y is 4.5 when x is 3, and y varies directly with x, find y when x is 9.

Write y = 3/5 x + 3 in standard form using integers

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 520 and a standard deviation of 180. The grading process of this year's exam has just begun.

How do you write 97.356 in number names and write this It using number base ten numerals

Triangle DEF has vertices at D (0,0), E (-2,-3) and F (-5,-3). Rotate triangle DEF 90degree clockwise about the vertex D.

3 times the sum of 5 times a number and 4 is 7 times the difference twice the number and 5, what is the number?

Round 37,748 to the tens

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