Answer:
x ≈ 2.76
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan78° =
=
=
( multiply both sides by x )
x × tan78° = 13 ( divide both sides by tan78° )
x =
≈ 2.76 ( to 2 dec. places )
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Answer:
450
Step-by-step explanation:
If 81 is 18% of a number then we can say that:
x × 0.18 = 81
We multiply by 0.18 because 18% is 0.18 as a decimal. So to work out the real number we divide 81 by 0.18:
81 ÷ 0.18 = 450
Answer:
25
Step-by-step explanation: