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4 years ago

Ten minus One-third of a number is 4

Mathematics

2 answers:

Virty [35]4 years ago

7 0

10 -1/3y = 4
1/3y = 10 - 4
1/3y = 6
y = 6 x 3 = 18

zloy xaker [14]4 years ago

6 0

Ok, so you automatically know that you are subtracting 6 from 10 to get 4. So, in order to figure out how it is 1/3 of that number, it is going to be multiplied by 3, getting 18. So, the number would be 18.

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Q7. Please see attached picture for full solution.

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Applying Pythagoras' Theorem,

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The green line drawn in picture 3 is the altitude of the triangle.

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sin 60°= $\frac{x}{42}$

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(to 3 s.f.)

Therefore, the length of the altitude of the triangle is 36.4cm.

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