Let S=score on the second exam, then
(67+S+(S+7))/3=84
cross multiply
2S+74=252
2S=178
S=89
So second exam: 89
third exam=89+7=96
Check: (67+89+96)/3=84 ok.
Answer:
The sum of the measures of the three interior angles of a triangle is always 180°. This fact can be applied to find the measure of the third angle of a triangle, if you are given the other two. Consider the examples below. A triangle has two angles that measure 35° and 75°.
-2x(x-7)
Just use distributive property.
-2x² + 14x
Answer: The value of <em>a</em> should be 3.11.
Step-by-step explanation:
Since we have given that
We need to find the value of a so that it would yield a system of linear equations with NO solutions.
As we know the condition of no solutions, it means the lines should be parallel.
i.e.
Consider the first two terms:
So, the value of<em> a</em> should be 3.11.