Find the mean for the data set. {222, 240, 220, 234, 202, 244, 226, 226, 214, 215, 196, 210, 191, 220, 225, 210, 229, 200, 236,
Nina [5.8K]
Answer:
answer
Step-by-step explanation:
217.14285714285
do the step by step calculation yetself
Answer:
Minus each number to figure out the common difference which is -4.
54-4= 50
50-4= 46
46-4= 42
42-4= 38
Answer:
Step-by-step explanation:
x% of 8 = 3
x% = ⅜ =0.375 = 37.5%
3 is 37.5% of 8
Answer:
<h2>-1</h2>
Step-by-step explanation:
(1) y² + x² = 53
(2) y - x = 5 ⇒ y = x + 5
subtitute (2) to (1)
(x + 5)² + x² = 53 |use (a + b)² = a² + 2ab + b²
x² + 2x·5 + 5² + x² = 53
2x² + 10x + 25 = 53 |subtract 53 from both sides
2x² + 10x - 28 =0 |divide both sides by 2
x² + 5x - 14 = 0
x² - 2x+ 7x - 14 = 0
x(x - 2) + 7(x - 2) = 0
(x - 2)(x + 7) = 0 ⇔ x - 2 = 0 or x + 7 = 0 ⇔ x = 2 or x = -7
subtitute the values of y to (2)
for x = 2, y = 5 + 2 = 7
for x = -7, y = 5 + (-7) = 5 - 2 = 3
Answer: x = 2 and y = 7 or x = -7 and y = 3
