One way in which to approach this problem would be to treat it as an equation of ratios and to cross multiply:
<span>[(4x + 15) / 5x)] = 1/2 could be written as:
4x + 15 1
----------- = ---
5x 2
Then 8x + 30 = 5x
3x = -30, and so x = -10 (answer). Be certain to check this answer through substitution!
</span>
1 (8/9) = 1.88888888
3 (11/12) = 3<span><span>.9166666667
</span>
</span>
3<span>.91666 / </span>1.8888 =
<span>
<span>
<span>
2.0735294118
</span>
</span>
</span>
So, she can make 2 batches of cupcakes.
Problem 9
By definition,

Answer: 502.4 m
Problem 10
From geometry, the angle opposite x is 27°.
By definition,

Answer: 263.3 yd
So you have
1. Low money account balance
2. Negative degrees
3. Possible points in a game.