The sum of the first four terms in an arithmetic progression is -18 and the sum of the first six terms is -9. Find the sum of the first ten terms.​

45

Step-by-step explanation:

Let the first term be a and the common difference be d.

So -18=4a+6d and -9=6a+15d. Solving this we get a=-9 and d=3.

So the sum of first 10 terms is 5*(2*(-9)+9*(3))=45

part a

in a city ice cream is mostly only bought when the temperature is very high as ice cream cools down our

so we can derive the conclusion that as the temperature increases the number of ice creams sold also increases

part b

y intercept is 5

slope is 2

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the k side

step-by-step explanation:

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