Answer:
b: elimination
Step-by-step explanation:
My vote is for elimination, though any of these methods (and some not listed) will get an answer quickly.
Subtracting the second equation from twice the first gives ...
2(9x +8y) -(18x -15y) = 2(7) -(14)
31y = 0 . . . simplify
y = 0 . . . . . divide by 31 (or invoke the zero-product rule)
Then the value of x can be found from the first equation:
9x = 7
x = 7/9
__
I like this method because it tells you that y=0 in one step. (Graphing does the same.) For the numbers here, you can do it mentally. Once you recognize that the x-coefficients and the constants are related by the same factor, and that factor is different for the y-coefficients, it becomes apparent that elimination will immediately tell you that y=0.
Answer:
A.) .75
Step-by-step explanation:
So the upper quartile is basically just the median of the bottom half. So we take the bottom half of the numbers:
0.5, 0.5, 0.75, 0.75, 1, 1, 1
And the median of the is 0.75
So the lower quartile is .75
hope this helps:)
Answer:
12.8
Step-by-step explanation:
1 1/4 cup of milk? if it is- 16 cups / gal
16/1 1/4 = 12.8 servings
I'll help. I love helping people
Answer:
- 9°C is less than -4°C
Step-by-step explanation:
The reason that why these temperatures are related because when we start counting the numbers from left, it becomes smaller. For ex- 3 is on the left of 5. So, 3 is smaller than 5. That's how when we start counting from the left in negative numbers, the negative numbers gets smaller.