Calculate var(Y) A) 92.25 B) 12.45 C) 8.55 D) 19.15

Q: 1. Use a graphic organizer to calculate (6 2). Explain why the product is not 6 2.

A: Expanding Binomial using graphic organizer.

Q: 2. Add the following: b) 799twelve 14631 seven + 6040seven a) + 218rwelve 3215six d) 11011two 423…

A: The values written in letters are quite confusing.. So i solved in both ways..

Q: When 6 is added to four times a number, the result is 50. Find the number A) 10 B) 11 C) 12 D) 13

A: Let a number x.

Q: is b) why did not you multiple c by 3?

A:

Q: 4) 6.3 mi 15.4 mi

A: Just use Pythagoras theorem and you are done.

Q: b) т? — 9т + 20

A:

Q: What is the average of the following numbers? 2, 5, 8, 1 (A 4.5 3. 5,

A:

Q: Could you please do C) as well

A: A 26 foot ladder is lowered down a vertical wall at a rate of 3 feet per minute. The base of the…

Q: 1. Simplify: a) v27V3 b) Vm7Vm³ c) VnVn8

A: a)  273=3×3×33              =3×3 273=9   b)  m7m5=m×m×m×m×m×m×mm×m×m×m×m…

Q: Simplify as much as possible: In(e2AB)

A: Given:          lne2AB

Q: If a number is increased by 40%, what percentage is the new number of the original number? A) 140%…

A:

Q: for b) where did you get 65

A: n = 10  The 95% confidence interval is 65±12 The mean is given in the question as 65 The mean = x¯ =…

Q: Simplify. 400 4 A) B) 10 C) 20 D) 50

A: We have to simplify

Q: Is 1326 a a triangular number? What about 1.37.8?

A: 1326 is the 51st triangular number because  and  is 1 more than 51.Similarl,1378 is the 52st…

Q: Write each as a fraction. 11) 0.81 12) 0.13 13) 0.25 14) 0.5

A: We use the basic property of removing decimal , to get desired fraction.

Q: a) 7* = 76 b) 2% = 163 c) 3(4*) = 24

A:

Q: 3) Which expression is equivalent to -?

A: Which expression is equivalent to x63x4-2