Answer:
C
Step-by-step explanation:
A: doesn't make sense since a 400 minute plan would cost $50
B: doesn't make sense because a 100 minute plan would cost $20
D: doesn't make sense because a 200 minute plan would cost $30
Isn’t it A? Cuz mean means average and that means to add all the numbers together and divide the amount
Answer: She has to score a minimum of 92 marks to take her average to 80
Step-by-step explanation:
Let the equation be
Three months total = 76 x 3 = 228
(x + 228) / 4 = 80
x + 228 = 80 x 4
x = 320 - 228
x = 92
Y = 4 is the answer.
Thanks (:
Answer:
x = 12 or 
Step-by-step explanation:
Find the length of x for one side of the triangle first. To do this, use the Pythagorean Theorem which states: a² + b² = c² or in this case c² - a² = b². c² is 45 and a² is 3*3 or 9. Subtract 45-9 to get 36. Find the square root of 36 to get 6. The opposite side is also going to have a missing side length of 6 so add 6+6 to get 12 as x.
Hope it helps!