Answer: Second option.
Step-by-step explanation:
Let be "e" the number of easy puzzles Tina solved and "h" the number of hard puzzles Tina solved.
Set up a system of equations:
You can use the Eliminationn Method to solve this system of equations:
- Multiply the first equation by -30.
- Add the equations.
- Solve for "h".
Therefore, through this proccedure, you get:
Answer:
84x + 36y =$276
60x + 18y =$174
then solve
Step-by-step explanation:
x- hot dogs, y- hamburgers
1st football game- 84x + 36y =$276
2nd football game- 60x + 18y =$174
358 as a number name is three hundred fifty eight.
For the first digit there are 7 choices. For the second digit there are 6 choices (because we can't use the same one again). And so on, until there is only one choice for the last digit.
The number of possible codes is this:
7*6*5*4*3*2*1 = 7! = 5040
Given
How to factor
Solution
Step 1
Multiply the first and last costant
Step 2
Write out all the pair factors of -6x^2
Step 3
Check for the pair, such that when you add you will get -x
Step 4
Replace -x with -3x+2x in the equation
Step 5
Put them into brackets Since + is at the center no stress.
Step 6
Factor out what is common in the bracket
Step 7
What is in the bracket are the same, pick one
