Systems by substitution: a phone company offers two monthly plans. plan a costs
$17
plus an additional
$0.17
for each minute of calls. plan b costs
$28
plus an additional
$0.13
for each minute of calls.

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7

Which of the following is true about the following construction of a tangent to a circle from a point outside of the circle?