You have to divide the numbers that do not have the variable y in it.
Answer:
C. The median of the test scores was 76
Step-by-step explanation:
The median is the middle value. In 21 values, the 11th value is the middle value, so it must be the median.
Answer: C. The median of the test scores was 76
The slope of the given line is -4/5. The line perpendicular to that line will have a slope that is the opposite reciprocal. In other words, the perpendicular slope will be 5/4. If it passes through (4, 12), we have an x and a y value to use in y=mx+b. y is 12, x is 4, and we have a slope of 5/4. Filling in accordingly:
and 12 = 5 + b. So b = 7. Rewriting with our new slope and b value,
. And there you go!
X = 69o
2x + 42 = 180
=> x = 69