Answer:
a = 1
b = -1
Step-by-step explanation:
First, let's make equations out of those given f(x)'s
-4 = -3a + b
2 = 3a + b
We can use elimination method to get rid of the a real quick
-4 = b
2 = b
Add those together
-2 = 2b
Divide both sides by 2
-2/2 = 2b/2
b = -1
Plug in the new b in one of the original equations; I'm gonna use the bottom one
2 = 3a - 1
+ 1 + 1
3 = 3a
3/3 = 3a/3
a = 1
Answer:
In Mathematics, x and y are examples of variables.
You can use any letter as a variable but, make sure to include a let statement when using variables.
A let statement essentially tells what the variable represents.
Ex: let h = houses sold
Hope this helps!
Step-by-step explanation:
X = boy count
x + 14 = girl count
x +x +14 = 86
2x + 14 = 86
2x = 72
x = 36
x + 14 = 50
There are 36 boys and 50 girls. Hope this helps!
Answer:
2775 ways
Step-by-step explanation:
We have been given the case to choose exactly two tails when flipped 75 times means 
Since, 
is equal to 
Here n =75, r=2 substituting the values we will get
After simplification we will get 
Cancel out the common term that is 73! we will get
after more simplification we will get 
Finally, we will get 
