Quincy claims that if 80 coats are sold, the outside temperature is likely to be about 42° f. did quincy make a reliable prediction? if not, what was his mistake?

No. Quincy should have used the trend line to find the corresponding x value when y=80.

C- No Quincy should have used the trend line to find the corresponding x value when y=80

Step-by-step explanation:

i just did it

Hello!

To solve for x, you need to follow SADMEP. SADMEP is subtraction, addition, division, multiplication, exponents, and parentheses. It follows the same rules as PEMDAS, but SADMEP is only used when solving algebraic equations.

x - 5 = 0.1(x + 5) (use the distributive property)

x - 5 = 0.1x + 0.5 (subtract 0.1x to both sides)

0.9x - 5 = 0.5 (add 5 to both sides)

0.9x = 5.5 (divide both sides by 0.9)

x = 6.1111... | This can be rounded to 6.11 km/hour.

Therefore, Kelli can swim about 6.11 kilometers per hour.