4 years ago

One third of a number is 15 less than five sixths of the number. Find the number.

Mathematics

2 answers:

leva [86]4 years ago

4 0

N/3=5n/6 -15

2n/6=5n/6-90/6

2n=5n-90

3n=90

n=30

levacccp [35]4 years ago

3 0

1/3(x) = 5/6(x) - 15
2/6(x) = 5/6(x) - 15
15 = 1/2(x)
x=30

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Find the area the figure is not drawn to scale 6.9 cm 4 cm

Grace [21]

Please check attached file to see if you mean the same triangle.

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A = b × h where b is base, h is height.
2

others also use the formula: Area=1/2(bxh)

Based on the figure, we have 6.9 cm (base) and 4 cm (height) as given.
Let us work out on the area of the said triangle.
A= 6.9cm × 4cm
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= 27.6cm²
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Hope this helps!