Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 989818: Show that exists. Please show the steps needed in order to solve.
Thank you
Click here to see answer by solver91311(24713)

Question 989834: x+y=12
Click here to see answer by EdenWolf(517)

Question 989860: Find an interval in the form [n,n+1] such that the equation x^4 - x = 5 has a solution in the in interval.
Please show how you solved.
Thank you
Click here to see answer by solver91311(24713)

Question 990050: An equation of a line through (-4, -5) which is perpendicular to the line y=4 x +3 has the following slope and b:

slope:

b:
Tried multiple times and still getting the wrong answer some how :/
Equation formulas i used:
y1-y2/x1-x2
y-y1=m(x-x1)
Please help
Click here to see answer by Alan3354(69443)

Question 990003: Find the volume of a rectangular prism which is 60cm long,35cm wide and 10cm high. The answer in litre, rounded to two decimal digits.
Click here to see answer by macston(5194)

Question 990032: 4power1-x+4power1+x=10

Click here to see answer by macston(5194)

Question 990097: 16 � s = 8
Click here to see answer by Timnewman(323)

Question 990118: -15v-40=23-8v
Click here to see answer by Timnewman(323)

Question 990144: an electronic store sells an average of 52 laptops per month at an average selling price that is $600 more than the cost price. for every $40 increase in the selling price, the store sells two fewer laptops. What amount over the cost price will maximize the revenue?
Click here to see answer by ankor@dixie-net.com(22740)

Question 990222: show me how to solve what is 15% of 8/9?
Click here to see answer by stanbon(75887)

Question 990222: show me how to solve what is 15% of 8/9?
Click here to see answer by Boreal(15235)

Question 990226: show me how to solve what is 50% on 8/9?

Click here to see answer by Boreal(15235)

Question 990226: show me how to solve what is 50% on 8/9?

Click here to see answer by josgarithmetic(39617)

Question 990237: 3.14(pi) times r squared=A and please help show the work that way I understand the problem step by step. I am trying to figure out what r is. Thank you
Click here to see answer by ikleyn(52781)

Question 990213: A bit lost here but making progress
For the limit
I know that I can break this down further.
So that becomes because it's approacing from the right. And thus after some rearranging I cancel and am left with
Now the part which confuses me, what do I do here? do I plug in 4/7? and if so why. Or do I plug in some value on the right approaching 4/7? This is what confuses me about one-sided limits is if they are approaching from one side or another shouldn't they be a a number with a ton of decimals but I can't expect my teacher to give me this question on an exam because I cannot use a calculator. So I am truly misunderstanding something here. What would change if the limit was approaching from the left what would I plug in then?
Any help is greatly apprieceted.
Click here to see answer by ikleyn(52781)

Question 990243: How do you solve the angles of a triangle. Give an example.
Click here to see answer by farohw(175)

Question 990230: If X equals eight and Y equals 20 what is why when X is 42
Click here to see answer by Alan3354(69443)

Question 990278: I'm having difficulty with Algebra II, what are some tips to make it more understandable and the easiest as possible, so I can get work done faster?
Click here to see answer by josmiceli(19441)

Question 990330: a(x-b)=x
Click here to see answer by josgarithmetic(39617)

Question 990334: a(x-b)=x rearrange for x

Click here to see answer by josgarithmetic(39617)

Question 990335: a(x-b)=x rearrange for x
Click here to see answer by josgarithmetic(39617)

Question 990343: 4(x-b)=x Solve for x
Click here to see answer by stanbon(75887)

Question 990387: How come x equals 9 in the equation x/6+6=9-z/6?
Click here to see answer by Alan3354(69443)

Question 990386:
Click here to see answer by rfer(16322)

Question 990408: This problem I and having major difficulty with. Could someone explain this in a simple way. My teacher made it very difficult and didn't clear up many of my fellow students questions.
Q: The distance of an object above the ground at time t is given by h(t) = cos(t). What is the velocity v(pi/3) of the object at t =pi/3.
Thank you!!
Click here to see answer by rothauserc(4718)

Question 990479: How do you factor 9p^2 - 42p + 49
Click here to see answer by ikleyn(52781)

Question 990478: How do you factor x^2 + 8x + 16
Click here to see answer by ikleyn(52781)

Question 990405: A function H is differentiable at x =4. An equation for the line tangent to the graph of H at x=4 is 2x + 3y = 5. Find H(4) and H'(4).
Please explain this.
Thank you
Click here to see answer by rothauserc(4718)

Question 990532: subtract -2\3p from 2p
Click here to see answer by Boreal(15235)

Question 989617: How do I determine what this limit is?
http://imgur.com/4SHh654
Thank you
Click here to see answer by Fombitz(32388)

Question 990573: Solve the following simultaneously equation
2x + 3y= 9
3x - y = 8
Click here to see answer by Alan3354(69443)

Question 990574: seven years after her son is born a mother is five times as old as he is. how old was the mother when her baby was born
Click here to see answer by josmiceli(19441)

Question 990574: seven years after her son is born a mother is five times as old as he is. how old was the mother when her baby was born
Click here to see answer by stanbon(75887)

Question 990422: Find the values of a and b assuming that the square is a regular polygon.
Side 1: 4a-b
Side 2: b+a
side 3: 2b-4
Click here to see answer by Fombitz(32388)

Question 990568: -7+10=m-5
Click here to see answer by flying61(1)

Question 990587: Solving 3^2x+1=1 as an exponential equation

Click here to see answer by Alan3354(69443)

Question 990526: -3x3+2[5-(3-4)]
Click here to see answer by rfer(16322)

Question 990663: I understand most of my homework, but every time I try to calculate it, it comes out wrong, here's an example of one of the questions on my homework: 15-(4m-5)=32 and you solve for m, it looks easy, but I need help.
Click here to see answer by farohw(175)

Question 990679: Please help with this: 3(1+4n)-2(5n-3)=25
Click here to see answer by ikleyn(52781)

Question 990718: Please help me with this: -6(x-2)+ 4(3-6x) = -36
Click here to see answer by rothauserc(4718)

Question 990720: solve each literal equation for the indicated variable.
2p/m - r/s = pr + q/ms for p
Click here to see answer by MathLover1(20849)

Question 990710: Solve each literal equation for the indicated variable. Then substitute the values of the other variables into the derived expression and simplify.
Solve V=1/3(pie r squared)H for H. Then evaluate the resulting expression to find H when V = 288(pie cm cubed) and r = 3in.
Click here to see answer by josgarithmetic(39617)

Question 990824: One alloy contains 80% gold (by weight)and another alloy contains 55% gold.how many grams of each alloy should be combined to make 40g of an alloy that contains 70% gold.
Click here to see answer by Alan3354(69443)

Question 990859: Suppose you walk at a rate of 210 feet/minutes. you need to walk 10,000 feet. how many more minutes will it take you to finish if you have already worked 550 feet?
Click here to see answer by macston(5194)

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