X= sandwiches
y= bottles of water
QUANTITY EQUATION
x+y= 200
COST EQUATION
$3x + $0.75y= $318.75
STEP 1
solve for one variable in quantity equation and substitute in cost equation
x+y= 200
subtract y from both sides
x= 200-y
STEP 2
substitute 200-y in for x
$3x + $0.75y= $318.75
3(200-y) + 0.75y= 318.75
600 - 3y + 0.75y= 318.75
combine like terms
600 - 2.25y= 318.75
-2.25y= -281.25
divide both sides by -2.25
y= 125 number of water bottles
STEP 3
substitute y=125 in either equation
x+y= 200
x + 125= 200
x= 75 sandwiches
ANSWER: There were 75 sandwiches and 125 bottles of water.
Hope this helps! :)
1.2+2.6x1.4-3.9
1.2+3.64-3.9
B) 0.94
Answer:
A) the possible outcomes for individual game is 210 games.
B) The possible outcome for this is 357 games.
C) Then the Possible Games are 267 games.
Step-by-step explanation:
A) Total number of individual games are 7 in which A ends up with 3 wins which give 4 remaining games. then there are two draw games from them. and in the end the remaining games are losses so,we useformula for combination:

B) Now Player A has 4 point that gives us 5 possibilities until we reach 7 games. Similarly B have 3 points which is same as player A gives us 5 possibilities until we reach 7 games. thus those two cases for player A and Player B can be stated as:

C) Lets say that player A ahs 4 points and player B has 3 points and all seven games have been played so.
c1) If player A has 4 wins and 3 losses then last win have to be in 7th match thus:the answer is
.
c2) If player A has 3 win, 2 draws and 3 losses thus it means that final match cannot be a loss thus the answer is
.
c3) Now lastly if player A has 1 win and 5 draws we can arrange them arbitrarily thus the answer here is
.
c4) now If player A has 2 wins, 4 draws and 2 losses thus answer is 
Sum of all the cases is

Answer:
Solution: given that
n = 38
p = 2/5 = 0.4 q = 1-p = 1-0.4 = 0.6
standard deviation = sqrt(n*p*q)
sqrt(38*0.4*0.6) = 3.0199
Answer:
A=150(1+2)^4
Step-by-step explanation:
Look up the compound interest formula, this is how you solve the problem.
A=P(1+r/n)^(nt)
A=150(1+(300%-100%)/1)^(1)4
A=150(1+2)^4
A=12150
If you have any questions about the math please feel free to ask. Have a nice day.