5% of the students got a grade lower than B. The percentage of students in each category should sum up to 1, or 100% of the students. Therefore, 100%-25%-30%-40%=5% of the students scored lower than B.
Answer:
S_k = k(3k - 1)/2
S_(k + 1) = [(k +1) (3k +2)]/2
Step-by-step explanation:
Sₙ = 1 + 4 + 7 + … + (3n - 2) = n(3n - 1)/2
To find Sk, replace all occurrences of n in Sₙ with k.
S_k = 1 + 4 + 7 + … + (3k - 2) = k(3k - 1)/2
To find S_(k+1), replace all occurrences of n in Sₙ with (k +1)
S_(k + 1) = 1 + 4 + 7 + … + [3(k + 1) -2] = (k +1) [3(k + 1) - 1]/2
After distributing the 3s and simplifying, we get
S_k = 1 + 4 + 7 + … + (3k + 1) = (k + 1) (3k + 2)/2
Answer:
Therefore in this problem 7 is the larger length and should be the hypotenuse, and 5 and 6 should be the lengths of the other two sides. Calculating: √( 52+62) = √(25+36) = √61=7.82 ≠ 7 , Therefore this is not a right angle triangle based on the Pythagorean theorem. If statement is true, then it is a right triangle.
Step-by-step explanation:
Yes so you will know I'm order what to do in your experiment