(12) Solve the pair of simultaneous equations below:-
4a − 3b = 18
a + 2b = -1
(13) The molar heat capacity of a solid compound is given by c = a + bt
Given that when and that when c = 10 when t = 50 and that c = 13 when t = 80 Find the values of a and b.
(ALL WORKING OUTS TO BE SHOWN)
(12)
"\\begin{matrix}\n -11b=22 \\\\\na = -1-2b\n\\end{matrix}"
"\\begin{matrix}\n a=3 \\\\\nb = -2\n\\end{matrix}"
(13)
"\\begin{matrix}\n 30b=3 \\\\\na =10-50b\n\\end{matrix}"
"\\begin{matrix}\n a=5 \\\\\nb = 0.1\n\\end{matrix}"
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