Francis heard that a car stereo system was on sale for 30% off. If the sale price was $57.75, what was the original price of the
2 answers:
Answer:
$82.50
Step-by-step explanation:
Francis heard that a car stereo system was on sale for 30% off.
The sale price was $57.75.
Let the original price of the car stereo system be 'x'
sale price = x - (30% of x) = 57.75
x - 0.3x = 57.75
0.7x = 57.75
x =
x = 82.5
The original price of the stereo system was $82.50.
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Answer:
a = 7, b =
Step-by-step explanation:
Using the sine ratio in the left right triangle and the exact value
sin45° = , then
sin45° = =
=
( cross- multiply )
a × = 7
( divide both sides by
)
a = 7
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Using the tangent ratio in the right triangle on the right and the exact value
tan60° = , then
tan60° = =
=
=
( multiply both sides by b )
b × = 7 ( divide both sides by
)
b = ×
=