Answer:
i gotta say C
Step-by-step explanation:
Answer:
B (5, 13)
Step-by-step explanation:
9x + 4y = 97
9x + 6y = 123
To solve by elimination, we want to <em>eliminate</em> a variable. To do this, we must make one variable cancel out.
First, we can see that both equations have 9x. To cancel out x, we must make <em>one</em> of the 9x's <em>negative</em>. To do this, multiply <em>each term</em> in the equation by -1.
-1(9x + 6y = 123)
-9x - 6y = -123
This is one of your equations. Set it up with your other given equation.
9x + 4y = 97
-9x - 6y = -123
Imagine this is one equation. Since every term is negative, you will be subtracting each term.
9x + 4y = 97
-9x - 6y = -123
___________
0x -2y = -26
-2y = -26
To isolate y further, divide both sides by -2.
y = 13
Now, to find x, plug y back into one of the original equations.
9x + 4(13) = 97
Multiply.
9x + 52 = 97
Subtract.
9x = 45
Divide.
x = 5
Check your answer by plugging both variables into the equation you have not used yet.
-9(5) - 6(13) = -123
-45 - 78 = -123
-123 = -123
Your answer is correct!
(5, 13)
Hope this helps!
The last answer is correct, "Dave is equally likely to select an even number as an odd number."
Numbers 1-10:
1
2
3
4
5
6
7
8
9
10
Out of those, 5 are even and 5 are odd.
So that means there's an equal chance that he selects an odd number as the chance of selecting an even number.
Mr. Swank van travel about 233. 75 miles with 12. 5 gallons of gasoline ⛽️
There are 7 pairs per poster and u have 8 posters so, I think u should do 7 times 8 and u get 56 so its B.56