How do i do a truth table

Which system is equivalent to 1 5x2 + By2 = 50 (7x² + 2y² = 10² (A) 5x2 + By2 - 50 7-21x² - by² = 10 (B) 5x2 + by2 = 50 -21x²-by? - 30 (C) 35x2 + 42y2 = 250 (-35x2 - 10y2 - -50 (D) 35x2 + 42y2 = 350 -35x2 - 10/2 - -50

On a multiple choice test, each question has 4 possible answers. if you make a random guess on the first question, what is the probability that you are correct?

What is two hundred seven thousand, forty-eight in standard form

3. Round the following digits to the place value indicated a) 3 594 (tens) b) 20 385 (hundreds) c) 3.4985 (thousandths) d) 9.1258 (tenths)

What is the mean absolute deviation of 3, 8, 10, 4, 9

How do i find ratios in word problems?

183x4 by rounding to estimate

7.2 x 12 x 0.23 = ? Round to the nearest hundredth. A. 19.88 B. 19.87 C. 19.44 D. 19.43

What is 12/39 in simplest form

Find three consecutive even integer with the sum of - 84