The answer is the temperature goes down 2.8° every hour and the expression is x=-11.2/4 because 4 is how many hours between 6pm and 10pm and its -11.2 because that was how much the temperature dropped from 6pm to 10pm
Answer:
ERROR
Step-by-step explanation:
Answer:
7: no ( the answer will be 65 )
-2 : no ( the answer will be -16 and -16 is not less than -16 instead they're equal)
2 : no ( the answer will be 20 )
-7 : no ( the answer will be -61)
Non of them satisfy the condition
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The answer you're looking for is 24/23.
I just took the test myself and this is correct.
(a+2)/(a-5) ÷ (a+1)/(a²-8a+15) =
Note : (a²-8a+15) = (a-3) (a-5)
∴ (a+2)/(a-5) ÷ (a+1)/(a²-8a+15) = [(a+2)/(a-5)] ÷ [(a+1)/(a-3) (a-5)] =
= [(a+2)/(a-5)] * [(a-3) (a-5)/(a+1)] = (a+2)(a-3)/(a+1)
not: the divide sign (÷) becomes (*)
and (a+1)/(a²-8a+15) becomes (a²-8a+15)/(a+1)
The original divisor of
{(a+2)/(a-5) ÷ (a+1)/(a²-8a+15)} = [(a+2)/(a-5)] * [(a-3) (a-5)/(a+1)]
If a = 1 or a = 5 that expression would be undefined, so we will restrict those values
