Answer:
Step-by-step explanation:
Let x represent the cost of one adult tickets to space city amusement park.
Let y represent the cost of one child tickets to space city amusement park.
The henson family bought 3 adult and 1 child for 163$. This means that
3x + y = 163 - - - - - - - - - - - - 1
The garcia family bought 2 adult and 3 child for 174$. This means that
2x + 3y = 174 - - - - - - - - - -2
Multiplying equation 1 by 2 and equation 2 by 3, it becomes
6x + 2y = 326
6x + 9y = 522
Subtracting, it becomes
- 7y = - 196
y = - 196/- 7 = $28
Substituting y = 28 into equation 1, it becomes
3x + 28 = 163
3x = 163 - 28 = 135
x = 135/2 = $45
Answer:
-6 & 6
Step-by-step explanation:
-6 time 6 is -36
Answer:
1,000,000,000 identification numbers are possible.
Step-by-step explanation:
We are assigned a 9 digit identification number.
Each digit is a number from 0 to 9. So, each digit has 10 different choices.
Using the Fundamental Counting Principle (is better than the tree diagram) because it's simpler. To illustrate this, we can attempt to draw a tree diagram.
The first column will be the digits 0 to 9.
Then for each of those digits, we need another 0 to 9.
As you can imagine, the amount of numbers grow exponentially, so using the Fundamental Counting Principle is simpler.
And since we have a 9 digit identification number, with each digit having 10 choices, the total number of identification numbers possible are:
So, 1,000,000,000 identification numbers are possible.
The value of b would be 47