Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 44518: Solve by completing the square:
x2 + 6x + 4 = 0

Click here to see answer by jake_6233(74)

Question 44514: Solve using the square root property:
(x + 3)2 = 49

Click here to see answer by jake_6233(74)

Question 44469: Rewrite the equation 2x – 3y = –6 as a function of x
Click here to see answer by checkley71(8403)

Question 44462: Write the equation of the line passing through (4, 4) and (4, 2).
A) y = 4 B) y = –2x C) x = 4 D) y = x + 4

Click here to see answer by checkley71(8403)

Question 44445:
Click here to see answer by checkley71(8403)

Question 44516: Solve by completing the square:
x2 + 6x + 4 = 0
Click here to see answer by tutorcecilia(2152)

Question 44516: Solve by completing the square:
x2 + 6x + 4 = 0
Click here to see answer by atif.muhammad(135)

Question 44448:
Click here to see answer by Nate(3500)

Question 44463: Given f(x) = 5x2 – 3x + 1, find f(–2).
A) 15 B) 27 C) –13 D) –25

Click here to see answer by Nate(3500)

Question 44546: elimination method
3(a-b)=15
4a=b+1
Click here to see answer by Nate(3500)

Question 44461: Find the y-intercept.
–x + 3y = 15
A) (5, 0) B) (0, –15) C) (0, 5) D) (–15, 0)

Click here to see answer by Nate(3500)

Question 44446: Given f(x) = 5x2 – 3x + 1, find f(–2).

Im getting -13
Am I correct?

Click here to see answer by Nate(3500)

Question 44555: Given f(x) = 5x2 – 3x + 1, find f(–2).
A) 15 B) 27 C) –13 D) –25

Click here to see answer by stanbon(57261)

Question 44556: Determine which two equations represent parallel lines.
A) y = 5/3 x + 4
b) y = - 3/5 x - 7
c) y =2x+ 8
d) y=2x-4
A) (c) and (d) B) (a) and (b) C) (b) and (c) D) (a) and (d)
Click here to see answer by stanbon(57261)

Question 44553: Rewrite the equation 2x – 3y = –6 as a function of x
Click here to see answer by stanbon(57261)

Question 44552: a=1+b
b=5-2a
solve
Click here to see answer by checkley71(8403)

Question 44429: Rewrite the equation 2x – 3y = –6 as a function of x

isn't it

f(x) = 2/3 + 6
Click here to see answer by checkley71(8403)

Question 44563:

Click here to see answer by checkley71(8403)

Question 44561:
Click here to see answer by Nate(3500)

Question 44578: Solve the following system of linear inequalities by graphing.
3x-y<2
x+y>2
Click here to see answer by josmiceli(9662)

Question 44576: Angus invested $18,000, part at 3% and part at 5%. If the total interest at the end of the year is $660, how much did he invest at each rate?
Click here to see answer by Nate(3500)

Question 44573: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of chocolate bar and the cost of a pack of gum.
Click here to see answer by Nate(3500)

Question 44569: Bob invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is $2,720, how much did he invest at 14%?
A). $11,000
B). $12,000
C). $8,000
D). $13,000
Click here to see answer by Nate(3500)

Question 44603: I have this question below and only managed to solve part of it.
In November 1998, the government announced in Parliament a $10.5 billion package to help the country overcome the Asian economic crisis. If the $10.5 billion is to be issued in $2 notes, what will be the volume of all the $2 notes, assuming that a $2 note has a length of 13.3, a width of 6.4 cm and a thickness of 0.15 mm. Give your answer in m^2 (metre square).
Volume = Length x Width x Height
= 3.3 x 6.4 x 0.015 (since 1 mm = 0.1 cm thus 0.15 mm = 0.015 cm)
= 1.2768 x 10 500 000 000 (1 billion = 1,000,000,000)
= 13395900000 cm^3
= 13395.9 m^3 (since 1 m^3 = 1 000 000cm^3)
Unfortunately, my teacher gave us the answer is 6 703.2 m^3.
Please help. Thank you in anticipation.

Click here to see answer by stanbon(57261)

Question 44602: Good day, tutors!
I've the following question but only managed to solve 2 parts of the three.
It took two and a half years and 2.85 million m^3 of earth fill the disused of ABC quarry at Apple Road.
a)If each truck can carry a maximum load of 6.25 m^3 of earth per trip, how many trips are needed to fill the entire quarry ? OK
b)If the cost of transport, material and administration for each truck load is $55, how much would it cost to fill the quarry ? OK
c)The quarry site now provides an area of approximately 3 hectares for future development. Calculate the cost of one m^2 of the land. (1 hectare = 10 000 m^2)
Please help to solve part (c) only. Thank you very much.

Click here to see answer by stanbon(57261)

Question 44567: Write the equation of the line passing through (3,-7),(-6,-7)
Click here to see answer by checkley71(8403)

Question 44551: complex fractions
9x^2 - 16y^2 over xy all over 3 over y - 4 over x
Click here to see answer by gsmani_iyer(180)

Question 44581: Solve the system by graphing.
x+y=4
-x+y=2
Click here to see answer by pvaka(23)

Question 44580: Solve the system by addition.
5x-4y=-5
x-2y=-7
Click here to see answer by pvaka(23)

Question 44426: Determine which two equations represent parallel lines. I thought it was c&d but I was wrong.

A) = 5/3 X +4

B) Y = - 3/5 X - 7

C) Y =2X+8
D) Y = 2X-4
Click here to see answer by pvaka(23)

Question 44606: simplify the complex fraction
9^2-16^2y over xy all over 3 over x -4 over x
Click here to see answer by gsmani_iyer(180)

Question 44527: 9x^2-16y^2 over xy all over 3 over y-4 over x
wouldn't xy be your common denominator?
Click here to see answer by gsmani_iyer(180)

Question 44456: complex fractions
9x^2-16y^2 over xy over 3 over y - 4 over x
show work
Click here to see answer by gsmani_iyer(180)

Question 44579: Solve the system by graphing.
3x+y=6
3x-y=0
Click here to see answer by venugopalramana(3286)

Question 44575: Solve the system by addition
2x-4y=7
4x+2y=9
Click here to see answer by venugopalramana(3286)

Question 44568: Write the equation of the line that passes through point (-2,3) with a slope of -4.
Click here to see answer by venugopalramana(3286)

Question 44653: elimination method
2x/3 + 3y/4 =11/12
x/3 + 7y/18 =1/2
wouldn't 12 be the common denominator in the first equation
help
Click here to see answer by adamchapman(301)

Question 44653: elimination method
2x/3 + 3y/4 =11/12
x/3 + 7y/18 =1/2
wouldn't 12 be the common denominator in the first equation
help
Click here to see answer by venugopalramana(3286)

Question 44679: Solve using the quadratic formula:
x2 – 3x – 3 = 5

Click here to see answer by tutorcecilia(2152)

Question 44730: Can someone explain to me how to find the slope and y-intercept when you only have the value for x. Like x=5.
I think that the slope would be undefined because this would be a vertical line, but would the y intercept be none?
Click here to see answer by adamchapman(301)

Question 44706: rewrite the wquation 4x-10y=11 as a function of x
A) y=-2/5x+11/10
B) y=-2/5x+11
C) y=2/5x-11
D) y=2/5x-11/10
Click here to see answer by Nazareth(2)

Question 44708: determine which two equations represent perpendicular lines
A) y=5/3x-3
B) y=3x-5/3
C) y=-1/3x+5/3
D y=1/3x-5/3
Click here to see answer by fractalier(2101)

Question 44701: Evaulate (-3) second power -17
A) 39
B) 24
C) 27
D)30
Click here to see answer by fractalier(2101)

Question 44673: SOlve the equation
3(n-1)^2+20=19(n-1)
Click here to see answer by fractalier(2101)

Question 44709: The length of a retngle is 1 in. more than twice its width. If the perimeter of the rectangle is 26 in., find the width of the rectangel
A) 4 in.
B) 5 in.
C) 6 in.
D) 3 in.
Click here to see answer by Rekham(3)

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