SOLUTION: A shop finds that the number N of icecreams it sells is related to temperature T degree celcius by the formula N= 150+2.5T for 20 < T < 30 a) find N when T is 22 b) make T the s

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Question 1036155: A shop finds that the number N of icecreams it sells is related to temperature T degree celcius by the formula N= 150+2.5T for 20 < T < 30
a) find N when T is 22
b) make T the subject of the formula
c) find T if N=220

NOTE
kindly answer ASAP.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+N+=+150+%2B+2.5T+
--------------------
(a)
+T+=+22+
+N+=+150+%2B+2.5%2A22+
+N+=+150+%2B+55+
+N+=+205+
-------------------
(b)
+N+=+150+%2B+2.5T+
Subtract +150+ from both sides
+2.5T+=+N+-+150+
Divide both sides by +2.5+
+T+=+%28+1%2F2.5+%29%2AN+-+60+
+T+=+.4N+-+60+
-------------------
(c)
+T+=+.4N+-+60+
+N+=+220+
+T+=+.4%2A220+-+60+
+T+=+88+-+60+
+T+=+28+