Answer:
C. (4,28)
Step-by-step explanation:
The substitution method requires you to input a specified number in place of a variable. In this case, the variable 'x' should be replaced by the number 4. Using the order of operations, we know that multiplication should be applied before subtraction. When we replace 'x' with 4, we get the equation 'y=8(4)-4'. Multiplying 8 and 4 gives us 32. If we subtract 4 from 32, we get 28. The answer ends up being 'y=28'.
That is the first part of our solution. What we are actually looking for is an ordered pair. We know ordered pairs are written in the form (x, y). First, we need to find the 'x'. The 'x' has been given to us from the beginning, it is 4. Next is the 'y'. This is what we needed to find using substitution. We ultimately concluded that the 'y' is equivalent to 28. Therefore our ordered pair is (4, 28), the letter choice C.
I hope this helped you and that I clearly elaborated on the answer choice.
Answer:
B
Step-by-step explanation:
Since they have 57 40-ounce water bottles, you need to have 57x40. Since they have 38 20-ounce bottles in stock, you need to have 38x20. Sinc ehte problem is asking for the total ounces in all, you need to add them. We do not need to add parentheses because PEMDAS
So,
57 x 40 + 38 x 20= n
That's a BIG increase in price! What cost $65 yesterday is now $156. What was the increase? $156 - $65 = $91.
Next: $91 is what fraction of $65? Divide. Answer: 1.4.
Finally, multiply this last result by 100%: 140% (answer)
D. 18 J because it’s the most reasonable answer
