3 years ago

Evaluate (b+c) if a=2,b=-5 and c= -3

Mathematics

2 answers:

anastassius [24]3 years ago

6 0

The answer would be -8

melisa1 [442]3 years ago

3 0

It’s a good idea to get into the habit of using parentheses

when substituting numbers in for variables.

If you have parentheses in your original problem, change them to brackets as you substitute (to avoid confusion).

Now plug in the values for b and c into the problem.

So we have [(-5) + (-3)].

Simplifying inside the brackets, we get [(-8)].

So -8 is the answer.

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Two angles are supplementary. The larger angle is 15 more than 10 times the smaller angle. FInd the measure of each angle.

garik1379 [7]

$\text{Larger angle} =x\\\\\text{Smaller angle} =y\\ \\\text{According to the condition,}\\\\x=10y+15\\\\\text{The two angles are supplementary, so their sum is}~ 180^{\circ} \\\\x+y=180\\\\\implies 10y+15 +y = 180\\\\\implies 11y = 180-15\\\\\implies 11y=165\\\\\implies y = \dfrac{165}{11}\\\\\implies y = 15\\\\\text{So,} ~x =180-15 = 165\\\\\text{Hence the larger angle is}~ 165^{\circ}~ \text{and the smaller angle is }15^{\circ}$