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# Recent questions in Equations, expressions, and inequalities

Equations, expressions, and inequalities
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asked 2021-06-14

### A disc jockey has to choose three songs for the last few minutes of his evening show. If there are nine songs that he feels are appropriate for that time slot, then how many ways can he choose and arrange to play three of those nine songs?

Equations, expressions, and inequalities
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asked 2021-06-08

### In January, the average high temperature for Calgary is 9.9 °C greater than Winnipeg’s average high temperature. The sum of these two temperatures is -15.5 °C. What is the average high temperature in January for each of these two cities?

Equations, expressions, and inequalities
ANSWERED
asked 2021-06-01

### The regular price for a pair of shoes is $48. The store is having a buy one get one 1/2 off sale. If you buy 2 pairs of shoes for that price, what percent discount is that? Equations, expressions, and inequalities ANSWERED asked 2021-05-16 ### Where does the helix $$r(t)=<\cos(\pi t), \sin( \pi t), t >$$ intersect the paraboloid $$z = x^2 + y^2$$? (x, y, z) = What is the angle of intersection between the helix and the paraboloid? Equations, expressions, and inequalities ANSWERED asked 2021-03-07 ### A family is canoeing downstream (with the current). Their speed relative to the banks of the river averages 2.75 mi/h. During the return trip, they paddle upstream (against the current), averaging 1.5 mi/h relative to the riverbank. a. Write an equation for the rate of the canoe downstream. b. Write an equation for the rate of the canoe upstream. c. Solve the system to find the family’s paddling speed in still water. d. Find the speed of the current of the river. Equations, expressions, and inequalities ANSWERED asked 2021-03-01 ### 6 less than the quotient of z divided by 3 Equations, expressions, and inequalities ANSWERED asked 2021-02-25 ### $$\displaystyle{\left(\frac{{5}}{{8}}\right)}+{\left(\frac{{11}}{{12}}\right)}$$ Equations, expressions, and inequalities ANSWERED asked 2021-02-25 ### An empty tank for storing water from a borehole has a volume of 480 m³. If it is filled by a pump that pumps water at a rate of 16 l/s, how many hours will it take the pump to fill this tank? Equations, expressions, and inequalities ANSWERED asked 2021-02-25 ### Expand the equation: (x+2)(x+3) Equations, expressions, and inequalities ANSWERED asked 2021-02-24 ### x+5=-17 Find x Equations, expressions, and inequalities ANSWERED asked 2021-02-21 ### 8 b + 12 = 52 Equations, expressions, and inequalities ANSWERED asked 2021-02-09 ### A helicopter is 800 m above ground and descending at 55 m/min. An airplane is taking off and rising 80 m/min. Equations, expressions, and inequalities ANSWERED asked 2021-01-19 ### Simplify by using order of operations: $$\displaystyle\frac{{{10}-{3}\cdot{2}}}{{{1}+{1}}}$$ Equations, expressions, and inequalities ANSWERED asked 2021-01-06 ### Saw a board 8 ft 4 in. long into nine equal pieces. If the loss per cut is 1/8 in., how long will each piece be? Equations, expressions, and inequalities ANSWERED asked 2021-01-05 ### Given: $$\displaystyle{b}=\frac{{3}}{{4}}{a}$$ a+b=21 Find a and b Equations, expressions, and inequalities ANSWERED asked 2020-12-25 ### A standard piece of paper is 8.5 inches by 11 inches. A piece of legal-size paper is 8.5 inches by 14 inches. By what scale factor k would you need to dilate the standard paper so that you could fit two pages on a single piece of legal paper? Equations, expressions, and inequalities ANSWERED asked 2020-12-07 ### $$\displaystyle{\left({2.66}×{10}^{{13}}\right)}÷{\left({9.5}×{10}^{{5}}\right)}$$ Equations, expressions, and inequalities ANSWERED asked 2020-11-26 ### Two spelunkers (cave explorers) were exploring different branches of an underground cavern. The first was able to descend 198 ft farther than twice the second. If the first spelunker descended a 1218 ft, how far was the second spelunker able to descend? Equations, expressions, and inequalities ANSWERED asked 2020-11-12 ### In August, Sports Depot had an average retail inventory of$145,256 and retail sales of \$645,320. Find the stock turnover at retail.

Equations, expressions, and inequalities
ANSWERED
asked 2020-10-28

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