04/16/20

Finding critical numbers, determine increase/decrease, concave up/down calculus 1
Consider the function f(x)=4x+7x^-1. For this function there are four important intervals: (−∞,A], [A,B),(B,C], and [C,∞) where , and are the critical numbers and the function is not defined at .... more
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04/16/20

Please help need help with geometry homework!
A right rectangular prism has length 9 cm, width 5 cm, and height 3 cm. If the length, width, and height are doubled, what happens to the surface area?A.) The surface area is multiplied by 4.B.)... more
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04/16/20

Local minimum and local maximum for calculus 1
The function f(x)=8x+9x^-1 has one local minimum and one local maximum.This function has a local maximum at x=? with value?This function has a local minimum at x=? with value? Please show detailed... more
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04/16/20

Tangent line and curves
use implicit differentiation of the curve at xy=4 next you will have to find the slope of the tangent line at point (-4, -1)
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04/16/20

Find the equation of the line in slope-intercept form
Find the equation of the line in slope-intercept form that is parallel to the line 5x – 2y = 7 that passes through the point (-10, 4).
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10/11/15

College algebra, help please!
How many ounces of water must be added to 20 oz of a 15% salt solution to make a 6% salt solution?
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10/11/15

Not sure how to find the distance
A cyclist traveled at a rate of 24mi/hr to visit a nearby town. The cyclist averaged 18mi/hr on the return trip. If the round trip took 4.9 hours what is the distance to the nearby town?
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10/11/15

not sure how to find the lower and upper limits
A piston rod for a automobile is 9 3/8 in. long with a tolerance of 1/32 in. What is the lower and upper limits of the length of the piston rod?
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10/11/15

If a 12 x12 ft wall takes 3/4 hour to paint How long will a 15x16 ft wall take?
If a 12 x 12 ft wall takes 3/4 hour (45min) to paint. How long will a 15x16 ft wall take to paint? Can't use cross multiplication and you Must show drawings to show how you solved the problem.
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10/11/15

Calculus word problem help
A drone plane moving at 70m/s, flies horizontally at an altitude of 400 meters directly over a radar station. Let 'O' be the angle of elevation of the drone. What is the rate of change of the angle... more
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10/11/15

College Algebra
Answer in interval form.  (x-5)(x+3)/x≥0 
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10/11/15

word problem, need solution
A stamp collection consists of 5 cent 13 cent and 18 cent stamps. The number of 13 cent stamps is one less than twice the number of 5 cent stamps. The number of 18 cent stamps is five more than the... more
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10/11/15

Twice the sum of a number and 6 is equal to three times the difference of the number and 3. Find the number
Twice the sum of a number and 6 is equal to three times the difference of a number and 3. Find the number
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10/11/15

Solve the equation | | 4x+1| | -4=4
I dont understand this question at all  
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10/11/15

Word problem. Need equation and solution
Yesterday, Jack drove 35 1/2 miles on 1 1/4 gallons of gasoline.  Calculate Jack's miles per gallon
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10/11/15

One saw and 4 hammers cost $11.50. Two saws and 6 hammers cost $114. How much does each item cost
I need to find two equations to find x and y but need hep finding the equations and solving
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10/11/15

An adult ticket costs 12$, a childrens ticket costs 8$. The theater wants at least 2720$ and they only have 275 seats. Write a system of inequalities and solve.
Alg 2 homework- lesson 2-9
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10/11/15

A coat. Cost 3 times as much as much as a pair of pants. Together they cost $180 how much does each cost?
I need to find two equations to find xand y but cantfind the equations please help.
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10/10/15

Stamp Collection Word Problem
Elisa was going to sell all of her stamp collection to buy a video games. After selling half of them she changed her mind. She then bought twenty more. How many did she start with if she now has 50? 
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10/10/15

On Tues I bought nine boxes. On Wednesday half of all the boxes that he had were destroyed. On Thursday there were only 21 left. How many did he have on Monday?
On Tuesday Ryan bought nine boxes. On Wednesday half of all the boxes that he had were destroyed. On Thursday there were only 21 left. How many did he have on Monday?
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10/10/15

how many kg of pure salt must be added to 30 kg of 2% solution of
how many kg of pure salt must be added to 30 kg of 2% solution of salt and water to increase it to a 10% solution   please explain me details
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10/08/15

Write and equation that relates two sizes of coffee
A coffee shop sells small cups of coffee for $0.95 each, medium for $1.25 each, and large for $1.55 each. Let S, M, and L be the number of small, medium, and large cups sold. They sold three times... more
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09/23/15

Trapezoid ABCD has right angles at A and D, and diagonals AC and DB intersect at point E. The area of triangle ABE is 25 square units, and the area of triangl
Trapezoid ABCD has right angles at A and D, and diagonals AC and DB intersect at point E. The area of triangle ABE is 25 square units, and the area of triangle DEC is 49 square units. If AD equals... more
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09/15/15

A bathtub contains 25 gallons of water. The tub is draining at a rate of 4.5 gallons per minute. Write a function
i don't know. i don't understand the question, and I need to do it for my test tomorrow
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06/02/13

How to graph this:
y= log3 (x+4)
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