Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 323738: If I paid $500 total for one item and sales tax of 7.75% has already been added on, how do I find out what the base price is and how much the sales tax was?
Click here to see answer by rfer(12670)

Question 323747: 3(-n – 1) = -16n + 49
Click here to see answer by rfer(12670)

Question 323750: Solve for t:
m = rt + 4
Click here to see answer by Fombitz(13828)

Question 323751: Solve for n:
m = q(2 + n)

Click here to see answer by jim_thompson5910(28598)

Question 323771: Solve for n:
C = 4r(n + p)
Click here to see answer by checkley77(12569)

Question 323779: Julie can paint a fence by herself in 12 hours. With Betsy’s help, it takes only 5 hours. How long would it take Betsy by her self.

Click here to see answer by checkley77(12569)

Question 323769: Solve for t:
PV = nRt
Click here to see answer by Alan3354(30993)

Question 323783: Seven inches are equivalent to 17.78 cm. Find the equation converting length in cm to length in inches. What is the length in inches of a 96.2 cm bar?
Click here to see answer by stanbon(57387)

Question 323778: David and Keith are route drivers for a fast -photo company. David route is 80 miles, and Keith’s is 100 miles. Keith averages 10 mph more than David and finishes his route 10 minutes before David. What is David’s speed.
Click here to see answer by josmiceli(9697)

Question 323891: Ray and Amir each bought a used car for the same price. Each needed repairs. The repairs on Ray's car cost an additional $800 and on Amir's, $200. Amir noted, "Ray, my total cost was really only 5/6 of your total cost." How much did each pay for his used car?
Click here to see answer by mananth(12270)

Question 323935: 9-2(7x-5)=3(x-5)
Click here to see answer by mananth(12270)

Question 323967: How do you write a prediction equation for data points shown in a scatter plot?
Click here to see answer by Fombitz(13828)

Question 323975: Which quadratic equation has roots 7 and -2/3?
a) 2x^2 - 11x - 21=0
b) 3x^2 - 19x - 14=0
c) 3x^2 + 23x + 14=0
d) 2x^2 + 11x - 21=0
Click here to see answer by Fombitz(13828)

Question 323975: Which quadratic equation has roots 7 and -2/3?
a) 2x^2 - 11x - 21=0
b) 3x^2 - 19x - 14=0
c) 3x^2 + 23x + 14=0
d) 2x^2 + 11x - 21=0
Click here to see answer by mananth(12270)

Question 324070: (6x/x-2)-6 = x-23/x-2
Click here to see answer by Fombitz(13828)

Question 324016: solve by substitution
3x+6y=-15
x+2y=-5
with steps please
thank you in advance.
Click here to see answer by Fombitz(13828)

Question 324142: How would I rewrite (sqrt3mn)^9 using rational exponents
Click here to see answer by Fombitz(13828)

Question 324144: What does it mean to refer to a 20-in. tv set or a 25-in. tv set. Such units refer to the diagonal of the screen. A 35-in.tv set also has a width of 28-in. How do I find the height?
Click here to see answer by solver91311(16897)

Question 324211: AB x CB = _ _ 9
Click here to see answer by Alan3354(30993)

Question 324227: multiply:
(-0.1x^6)(0.2x^4)
Click here to see answer by checkley77(12569)

Question 324224: add:
(8a^2 + 4a - 7) + (6a^2 - 3a - 1)
Click here to see answer by checkley77(12569)

Question 324248: 3(2x + 3)= (x - 5)
Click here to see answer by jim_thompson5910(28598)

Question 324257: hello can someone please help me with this problem:
Give an example of an identity involving a system of three equations in three unknowns.
please help me with this problem! (:
Click here to see answer by rapaljer(4667)

Question 324296: I would like to know how to solve this problem:
Find the value of x using the formula x=50-6y when y=4.
Please show me how to this and explain it.
Thank you for your assistance.
Click here to see answer by shawtybabi09(1)

Question 324297: Hi I would really like help to solve this question.
Rewrite the following in a shortened form:
(x-3)x(x+3)=?
Please show me how to do this and explain it.
Thanks.
Click here to see answer by mananth(12270)

Question 324229: (3x^2 - 2x - 13) divide (x - 2)
Click here to see answer by prof.kolawole(1)

Question 324298: Hello tutor, I would really appreciate it if you helped me with this problem.
Complete each table using the formula given:
(a) b=3a
A= 1 2 3 4
B= ? ? ? ?
Thank you for your time and assistance.
Click here to see answer by Fombitz(13828)

Question 324314: Please help me solve this problem:
When x= -1, find 2x^3-(3x)^3
Thank you your assistance is appreciated.
Click here to see answer by Fombitz(13828)

Question 324434: On Sunday, a local hamburger shop sold a combined total of 520 hamburgers and cheeseburgers. The number of cheeseburgers sold was three times the number of hamburgers sold. How many hamburgers were sold on Sunday?

Click here to see answer by rfer(12670)

Question 324517: 2x + 5y - 7x + 2xy Could you please show me the steps on how to simplify this problem?
Click here to see answer by unlockmath(1603)

Question 324591: solve 1/3=n/ 4 1/7
Click here to see answer by rfer(12670)

Question 324632: slove for the x-value in the system of equations 8x-3y=-2 and 3x+5y=-13

Click here to see answer by Fombitz(13828)

Question 324624: multiplication on rational expression
Click here to see answer by Fombitz(13828)

Question 324638: find the value of log5 "30"
Click here to see answer by Fombitz(13828)

Question 324639: f(x)=x^3+2x^2+x-10 give that -1 is a zero of f(x)
Click here to see answer by Fombitz(13828)

Question 324739: If 2H = a^2x/6b, then x = ?
Click here to see answer by Fombitz(13828)

Question 324640: Find the fourth term in the expansion (3y-z)^7
Click here to see answer by Fombitz(13828)

Question 324616: 4-3/5(3a+4)=7
Click here to see answer by Fombitz(13828)

Question 324823: Can someone please help me with this equation?
log(x) + log(x - 99,990) = 6
x = ______
Jerry
jerry@san.rr.com
Click here to see answer by stanbon(57387)

Question 324852: v-4(4-v)=-2(2v-1)
Click here to see answer by rfer(12670)

Question 324852: v-4(4-v)=-2(2v-1)
Click here to see answer by jim_thompson5910(28598)

Question 324824: Can someone please help me with this?
Let f(x) = 3x + 5 and g(x) = x^2 + 2. Find the following.
(f o g)(0)
Alberto
beto@san.rr.com
Click here to see answer by Fombitz(13828)

Question 324938: Solve the equation for x.
log2(x) + log2(x - 1) = 1
I am coming up with x = {2, 1} but the application is telling me to "Check the syntax of your response."
Please help.
Alberto
Click here to see answer by nerdybill(6962)

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