1,642 Answered Questions for the topic Math Help For College

Math Help For College

05/09/17

PLEASE HELP ME answer this
If the voltage V in an electric circuit is held constant, the current I is inversely proportional to the resistance R. If the current is 40 amperes when the resistance is 285 ohms, find the current... more
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Math Help For College

05/09/17

please help me answer this
Pairs of markings a set distance apart are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T. In one... more
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Math Help For College

05/09/17

PLEASE HELP ME answer this
The amount P of pollution varies directly with the population N of people. City A has a population of 494,000 and produces 260,000 tons of pollutants. Find how many tons of pollution we should... more
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Math Help For College

05/09/17

please help me answer this
The weight of a synthetic ball varies directly with the cube of its radius. A ball with a radius of 2 inches weighs 5.20 pounds. Find the weight of a ball of the same material with a 3-inch radius?
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Math Help For College

05/08/17

Earl Miller deposited $25,000 at Y Bank at an interest rate of 12% compounded quarterly. (Use the tables in the handbook.) The effective rate (APY) is:
finding the effective rate
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Math Help For College

05/04/17

Math hexpected value help
A company has a choice of four oil fields to buy. Field one has a 25% chance of having 10 million dollars worth of oil, field two has a 33% chance of having 9 million dollars worth of oil, field... more
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Math Help For College

05/04/17

Expected value
You are a manager for a local restaurant. In a given evening, you have a 1% chance that you will need only 1 employee, a 3% chance that you will only need 2 employees, a 35% chance that you will... more
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Math Help For College

05/02/17

Type the slope-intercept form of the equation of the line
write an equation in slope-intercept form of the line satisfying the given condition. The line passes through (3,-5) and is parallel to the line whose equatio is Y=2x+4
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Math Help For College

04/25/17

Mitch throws a baseball straight up in the air from a cliff that's 48 ft high. The initial velocity is 48 ft per second.
Mitch throws a baseball straight up in the air from a cliff that's 48 ft high. The initial velocity is 48 ft per second. The height (in feet)of the object after t second is given by h(t) = -16t^2 +... more
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Math Help For College

04/25/17

Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.
So basically, it's a multiple choice question and I got stuck. So there are 4 options, 2 of them are completley wrong but the other two options are these: y=(-1/16)x^2, x=(-1/16)x^2   This is the... more
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04/24/17

Help proving differential equation
I', really stuck on this one HW question:   I have to show how dC/dt = (D * (d^2C/dx^2)) + P at steady state (so when cD/dt =0)equals: (d^2C/dz^2) + (Pa^2/D C(a)) = 0 using C= C(x)/C(a) and z=x/a... more
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Math Help For College Math Math Help Math Word Problem

04/22/17

Write the dilution ratio that was performed, as a fraction in lowest terms
A 20% solution of NaCl in H2O is diluted, by adding distilled water, to a final concentration of 6% NaCl. A 20% solution of NaCl in H2O is diluted, by adding distilled water, to a final... more
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Math Help For College Math Math Help Math Word Problem

04/22/17

find the overall dilution ratio and the total amount of water added
A 24% w/v stock solution of NaCl is diluted with water according to a 1:10 dilution ratio, then again by a 5:6 dilution ratio. a) Determine the overall dilution ratio (in lowest terms) performed:... more
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04/20/17

Let c be the total charge​ (in dollars) for t hours of tutoring. Are t and c linearly​ related?
A math tutor charges $2020 per hour. Let c be the total charge (in dollars) for t hours of tutoring. Are t and c linearly related? If so, find the slope and describe what it means in this... more
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Math Help For College

04/17/17

One integer is 8 more than another. Their product is 153. Find the integers
One integer is 8 more than another. The product is 153. Find the integers 
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04/17/17

Word problem was to long for this box.
A flower bed is in the shape of a triangle with one side twice the length of the shortest side and the third side is 25 feet more than the length of the shortest side. Find the dimensions if the... more
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04/17/17

moving truck company comparison
You need to rent a moving truck for two days. Rider MovingTrucks charges $50 per day and $.50 per mile. UMove Trucks charges $45 per dayand $0.75 per mile. Write an equation describing each... more
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Math Help For College

04/16/17

Determine the pivot entries of the matrix
A=(1 1 2 2 2       1 2 1 3 2       1 2 1 4 3       1 3 0 4 2)   Determine the pivot entries of the matrix and use this to decide if the columns of A span R4  
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Math Help For College

04/15/17

help with this question
Melanie invests a total of $7,500 in two accounts. The first account earned a rate of return of 14% (after a year). However, the second account suffered a 8% loss in the same time period. At the... more
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Math Help For College

04/12/17

equence A counts down from 46 by 7: 46, 39, 32 and so on. Sequence B counts down from one number (not 46)
Sequence A counts down from 46 by 7: 46, 39, 32 and so on. Sequence B counts down from one number (not 46) by another number (not 7). In sequence B, the second number is 35, the sixth number is 23,... more
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Math Help For College

04/11/17

find any numbesr for which the rational expression is undefined
y ___ 7y^2+17y+6
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Math Help For College Math Word Problem

04/06/17

Find the measure of each angle.
Two angles are supplementary. One angle is 15 degrees less than twice the other angle.
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Math Help For College

04/02/17

suppose r varies directly as the square of m, and inversely as s. If r =19 when m=6 and s=4, find r when m=24 and s=4
suppose r varies directly as the square of m, and inversely as s. If r =19 when m=6 and s=4, find r when m=24 and s=4
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Math Help For College

03/27/17

population of 315,530,612 and an area of 3,539,225 square miles . What is the population density of the untied states ( rounded to the nearest whole person )
help show the work 
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Math Help For College

03/26/17

Classrooms on one side of the language artslanguage arts building are all numbered with consecutive oddodd integers. If the first​ room, the room with the small
Classrooms on one side of the language arts building are all numbered with consecutive odd integers. If the first room, the room with the smallest classroom number, on this side of the building is... more
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