How many quarts of pure antifreeze must be added to 2 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution?
1 answer:
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Given:
Rachel used of her savings to buy brushes.
She used of her savings to buy paint.
To find:
The fraction for remaining savings.
Solution:
Fraction that Rachel used of her savings to buy brushes and paint is
Now,
Therefore, of her savings is remaining.
From the circle geometry theorem, a tangent to a circle makes 90° angles with the radius of the circle.
RQ is perpendicular to QP
Triangle RQP is a right-angled triangle
by Pythagoras theorem
units (rounded to one decimal place)
RQ is perpendicular to QP
Triangle RQP is a right-angled triangle
by Pythagoras theorem