Algebra 123
Suppose that you want to mix two coffees in order to obtain 100 pounds of a blend. If x represents the number of pounds of coffee A, write an algebraic expression that represents the number of pounds of coffee B.
An algebraic expression that represents the number of pounds of coffee B is
Betsy, a recent retiree, requires
$6,000
per year in extra income. She has
$60,000
to invest and can invest in B-rated bonds paying
15%
per year or in a certificate of deposit (CD) paying
5%
per year. How much money should be invested in each to realize exactly
$6,000
in interest per year?
The amount of money invested at 15%=
The amount of money invested at 5%=
A bank loaned out
$10,000,
part of it at the rate of
7%
per year and the rest at
17%
per year. If the interest received in one year totaled
$1000,
how much was loaned at 7 % question mark 7%?
The manager of a store that specializes in selling tea decides to experiment with a new blend. She will mix some Earl Grey tea that sells for
$4
per pound with some Orange Pekoe tea that sells for
$2
per pound to get
400
pounds of the new blend. The selling price of the new blend is to be
$2.50
per pound, and there is to be no difference in revenue from selling the new blend versus selling the other types. How many pounds of the Earl Grey tea and Orange Pekoe tea are required?
The blend should have
pounds of Earl Grey and
pounds of Orange Pekoe.
Trent can deliver his newspapers in
10
minutes. It takes Lois
40
minutes to do the same route. How long would it take them to deliver the newspapers if they work together?
It will take
minutes.
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A motorboat can maintain a constant speed of 1919 miles per hour relative to the water. The boat makes a trip upstream to a certain point in 4646 minutes; the return trip takes 3030 minutes. What is the speed of the current? |
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The speed of the current is
mile(s) per hour.