Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 326304: what is 4a + a=?
Click here to see answer by AAfter Search(61)

Question 326303: Find the values of k that will make the solutions of the given quadratic equation equal.

9x2 - kx + 36 = 0
Click here to see answer by mananth(12270)

Question 326302: Find the values of k that will make the solutions of the given quadratic equation equal.

kx^2 - 10x + 5 = 0
Click here to see answer by AAfter Search(61)

Question 326302: Find the values of k that will make the solutions of the given quadratic equation equal.

kx^2 - 10x + 5 = 0
Click here to see answer by mananth(12270)

Question 326176: 7x - 6y =-9
5x + 36 = y
Click here to see answer by AAfter Search(61)

Question 326353: Evaluate the following expression for p = -4 and r = 7
-p + 3r + 5(2r + 7) – r + 6p
is the answer 99
Click here to see answer by mananth(12270)

Question 326353: Evaluate the following expression for p = -4 and r = 7
-p + 3r + 5(2r + 7) – r + 6p
is the answer 99
Click here to see answer by J2R2R(94)

Question 326294: The product of two consecutive odd negative integers is 143. Find the integers. (Hint: If one integer is x, the next consecutive odd integer is x + 2, and the third is x + 4.)

Click here to see answer by Alan3354(30983)

Question 326293: Use the quadratic formula to solve the following equation. (Enter solutions from smallest to largest. If the solutions are complex, enter them from smallest to largest value of the imaginary part.)

27w^2 + 24w+1=0
Click here to see answer by Fombitz(13828)

Question 326392: Simplify:
5y – (3x – 4y) + 7x + 4
Click here to see answer by nyc_function(2733)

Question 326297: The height of a triangle is 4 meters longer than twice its base. Find the height if the area of the triangle is 63 square meters.

Click here to see answer by nyc_function(2733)

Question 326299: Use completing the square to solve the following equation. (Enter solutions from smallest to largest. If the solutions are complex, enter them from smallest to largest value of the imaginary part.)
-6=2x^2-13x
Click here to see answer by Fombitz(13828)

Question 326634: solve the formula for the indicated variable
rs/18-z-t z=
Click here to see answer by Fombitz(13828)

Question 326714: 5 times a number added to 7.
Click here to see answer by Fombitz(13828)

Question 326645: solve T-5/3Q-25 for Q
Click here to see answer by JBarnum(2044)

Question 326639: j/11-k/3-10
k=
Click here to see answer by Fombitz(13828)

Question 326950: What is the algebraic expression or variable for:
Nine times the quantity six less than a number is fifty.
I think it is 9x-6
Thank you.
Click here to see answer by nyc_function(2733)

Question 326952: Solve the algebraic expression or variable for:
Five times the quantity one more than a number x is sixty-four?
I think the answer is 5x + 1
thank you for your help
Click here to see answer by nyc_function(2733)

Question 326923: Solve the equation using substitution
x-9=3y
x+2y= -1
Click here to see answer by AAfter Search(61)

Question 327026: Write the equation of a line with the slope of -2 which contains the point (3,6) ?? How would i do this?

Click here to see answer by mananth(12270)

Question 327006: Please help me divide and simplify) please show all steps so I can learn this.
z^2-2z+1/z^2-1/(4z^2-z-3)
This is by far the hardest thing I have ever done. Thank you in advance..Please help me.
Click here to see answer by Fombitz(13828)

Question 327227: Solve. Identify all double roots for each equation.
8y^2+1=6y
x^4-25x^2=0
(x-3)^3-(x-3)^2=0
Click here to see answer by solver91311(16872)

Question 327326: 6y+y(4-2)=12
Click here to see answer by jvan(28)

Question 327717: I need help solving please.
x-1/x+2 = 5/7
Thank you
Click here to see answer by ankor@dixie-net.com(15639)

Question 327804: John takes 3 hours longer than Andrew to
peel 500 pounds (lb) of apples. If together they can peel
500 lb of apples in 8 hours, then how long would it take
each one working alone
Click here to see answer by ankor@dixie-net.com(15639)

Question 327904: solve by elimation
4x-8y=5
4x-8y=6
I know I must multiply to make one of the equations the opposite of the other, but I am not sure which or by what number. I am thinking (-1) and the first equation. but that is just going to bring the equation to
-4x+8y=-5
4x-8y=6
which still doesnt work..So I am all sorts of confused, if you can please help me out and explain..Much appreciated!!!THANKS A BUNCH!!!
Click here to see answer by stanbon(57261)

Question 327970: solve the following system of equations
x+6y=5 (1)
x=2-6y (2)
what is the solution of the system

Click here to see answer by ganeshindia(11)

Question 327960: Amy paid $53.43 for a pair of running shoes during a 40% off sale what is the regular price
Click here to see answer by mananth(12270)

Question 328066: Please show me how to solve for the variable in the equation 3(-2-3x)=-9x-4.
Thank you
Click here to see answer by rapaljer(4667)

Question 328075: At Dr. Carrey's clinic, 42% more patients are treated for flu symptoms in the winter than in the summer. Which is an algebraic expression for the number of flu cases in the winter?
A) w-(0.58)w
B) s+(0.42)s
C) -(0.58)w
D) (0.42)s
Click here to see answer by rapaljer(4667)

Question 328085: x=5/2y-1/5; solve for y
Click here to see answer by Fombitz(13828)

Question 328187: Write the following as an algebraic expression using x as the variable: Triple a number subtracted from the number
A. 3(x - x)
B. 3x - x
C. x 3 – x
D. x - 3x

Click here to see answer by checkley77(12569)

Question 328135: The question is: The perimeter of a rectangle is 96 meters. Three times the width is 8 meters less than the length. What are the dimensions of the rectangle?
A) Identify the two unknowns:
B) Write a system using the two unknowns:
C) Solve the system using any (Substitution, Elimination) method
I know that "Three times" is the same as saying 3x also that "the width is 8 meters less then the length" is the same as saying W=8-L. I know that P (Perimeter) is 96 meters. I just don't know how to solve for the rest of the problem!

Click here to see answer by checkley77(12569)

Question 328330: Solve using substitution
3x+2y=6
x=34-6y
Click here to see answer by mananth(12270)

Question 328330: Solve using substitution
3x+2y=6
x=34-6y
Click here to see answer by mljoo(4)

Question 328332: solve
-0.7x<-49
Click here to see answer by mananth(12270)

Question 328322: graph the equation and identify the y intercepts
y+x=-7
Click here to see answer by mljoo(4)

Question 328284: Finding the Value of a Variable. Fill in the table using the given formula:
s=n(n+1)(2n+1)/6
n S
1
2
3
4
5

Click here to see answer by Fombitz(13828)

Question 328316: 9x-8y=32
8y-9x=-32
what is the solution of the system equations
a no solution
b infinitely many solution
c a point
is the system consistent or inconsistent
is the system dependent or independent
Click here to see answer by Fombitz(13828)

Question 328325: graph the line containing the given pair of points and find the slope
(3,0),(-1,-2)
Click here to see answer by Fombitz(13828)

Question 328587: Chemistry. The decay rate of krypton-85 is 6.3% per year. What is its half-life?
Click here to see answer by stanbon(57261)

Question 328670: the length of a rectangle is fixed at 23 cm. What widths will make the perimeter greater than 90 cm? the width must be greater than what cm
Click here to see answer by mananth(12270)

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