Solve the following pairs of simultaneous equations by substitution.
check that your solutions satisfy both equations.
a. y= x – 2 b. y = 2x + 6
y = 3x + 4 y = 4 - 2x c. y = x +1 d. y = x - 2
x + y = 3 3x + y = 14
e. y = 2x + 1 f. y=1 - 2x
x + 2y = 12 x + y = 2

Solve for x and select the correct answer

Recall that two angles are complementary if the sum of their measures is? 90°. find the measures of two complementary angles if one angle is twenty dash nine times the other angle.

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean