Math 025
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HW4
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Neatly show all work in space provided. Work must corroborate answer to be eligible for any
credit.
1
Solve the following problem algebraically. That is, set up an equation in one variable
and solve
it. Be sure to label clearly what the variable represents. A bricklayer can complete a wall in 7
days, whereas his assistant can do the same size wall in 3 days. Working together, how long will
it take for them to complete the wall?
2
Solve the following problem algebraically. That is, set up an equation in one variable and solve
it. Be sure to label clearly what the variable represents. Bill can ride 10 km in the same time that
Jill can ride 15 km. If Jill rides 10 kmph faster than Bill, how fast does Bill ride?
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3
Solve the following problem algebraically. That is, set up a simultaneous set of equations and
solve it. Be sure to label clearly what the variable represents. Two alloys, one 40% iron (X) and
the other 60% iron (Y), are to be melted down to form another alloy. How much of each alloy
should be melted down and mixed to form 72 tons of an alloy that is 55% iron?
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 Spring '11
 Fisher
 Math, Algebra, Expression, Exponentiation, following problem

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