Answer:
a) A total of 27 parents will receive a call on the third round of calls. b) A total of 39 parents would've been called by the end of the third round of calls. c) There would have to be a total of between 5 and 6 rounds
Step-by-step explanation:
Every time the total number of parents call 3 people, the number of parents tripled in every round.
3 to 9 to 27 to 51 to 153 to 459
Since 153 and 459 are between 5 and 6 rounds, the phone calls will stop between those 2 rounds.
Answer:
Step-by-step explanation:
<u>You just add up the numbers of different ways:</u>
Answer:
the equation is f(x)= 2/3x -2. or c
Step-by-step explanation:
you know that it cant be d because the y- intercept is -2 not +2. and you know that it cant be b because it is a positive slope. to find the slope you need to find 2 points that that the line crosses through, like (0, -2) and (3,0). now you see that it goes up 2 and over 3. 2/3
f(x)= 2/3x -2
1) solve for x by multiplying each equation with the opposite number and making one a negative
-4(5x + 2y =-9)-4
5(4x +3y = 25)5
2) multiply on both sides of equal sign
-20x - 8y = 36
20x + 15y = 125
3) add all the like terms to get new equation
7y = 161
4) simplify
7y = 161
/7 /7
y = 23
5) make ordered pair and then input 23 into original equation
( x , 23)
5x + 2y = -9
5x + 2(23) = -9
5x + 46 = -9
-46 -46
5x = -55
/5 /5
x = -11
6) input to ordered pair
(-11, 23)
7) Thats your answer!