Step-by-step explanation:
2x³ + 14x² + 4x + 28
2(x³) + 2(7x²) + 2(2x) + 2(14)
2(x³ + 7x² + 2x + 14)
2(x²(x) + x²(7) + 2(x) + 2(7))
2(x²(x + 7) + 2(x + 7))
2(x² + 2)(x + 7)
The answer is C.
<span>A direct variation means proportionality. Triangular numbers are quadratic in n. T(n)=n(n+1)/2. So no.</span>
Answer:
78%
Step-by-step explanation:
Given the stem and leaf plot above, to find the median percentage for boys in the German test, first, write out the data set given in the stem and leaf diagram as follows:
40, 46, 46, 47, 69, 70, [78, 78,] 79, 82, 87, 90, 90, 95
The median value is the middle value in the data set. In this case, we have an even number of data set which are 14 in number.
The median for this data set would be the average of the 7th and 8th value = (78+78) ÷ 2 = 156/2 = 78
Median for boys = 78%
Yes, because 6/7 is the same as 36/42 and 4/6 is the same as 28/42. It is easy to see that 6/7 is greater than 4/6