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

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

Question 175590: can you please help me find the square root, simplified in radical form of: (((25a^2b^2)))
Click here to see answer by josmiceli(9671)

Question 175591: can you please help me find the square root and simplify in radical form: (((50x^2)))
Click here to see answer by solver91311(16877)

Question 175587: can you please help me graph the solution for: (((x/3_<5)))
Click here to see answer by solver91311(16877)

Question 175690: Do you minus the exponents in a division problem?
Click here to see answer by stanbon(57314)

Question 175689: What is -63x to the fourth divided by 9x?
Click here to see answer by Mathtut(3670)

Question 175779: Your math teacher tells you that next week's test is worth 100 points and contains 29 problems. Each problem is worth either 5 points or 2 points. How many of each type of problem are on the test?
Click here to see answer by Mathtut(3670)

Question 175794: Thomas has $ 6.35 in dimes quarters. The number of dimes is three more than three times the number of quarters. How many quarters does has she have?
Click here to see answer by Fombitz(13828)

Question 175718: The question is 18x to the -6 power divided by -3x to the -3 power. We need to solve and simplify -- if there is a negative exponent, simplify so that it is made positive.
Click here to see answer by ankor@dixie-net.com(15649)

Question 175793: Use the interest formula to find the following value. Round to the nearest penny.
i=$125
r=6%
t=1
Find p.
Click here to see answer by EMStelley(187)

Question 175801: In a triangle, the measure of the second angle is twice the measure of the first angle. The third angle is equal to the sum of the other angles. What are the measures of the angles?
Click here to see answer by EMStelley(187)

Question 175800: A boy has 93 cent in pennies, nickels, dimes, and quarters. He has two more quarters than dimes. If he has as many nickels as dimes and as many pennies as quarters, how many of each coin does he have?
Click here to see answer by EMStelley(187)

Question 175799: Dad's age is equal to the sum of Laura's, Jeri's and Theresa's ages. If Jeri is 4 years older than Theresa and 3 years younger than Laura, and Dad's age is 38, how old is each daughter?
Click here to see answer by EMStelley(187)

Question 175844: 2x+y x=-2 y=4
----
xy -2
Click here to see answer by Alan3354(30993)

Question 175848: hello....i just need help with this one problem. thanks
Simplify (12x3y3 – 5x2 + 3y2) – (4x3y3 + 6x2y – 3x2 + 5)....can u please show the steps...plz
Click here to see answer by jim_thompson5910(28593)

Question 175858: solve each of the following for the indicated variable
d=rt for r
Click here to see answer by stanbon(57314)

Question 175941: The area of a circle is calculated using the following equation:
A=(pi)r(squared). (I couldn't find the symbols for either pi or squared.)
Anyhow, the equation needs to be rewritten. If the diameter is half the radius, how can I rewrite the equation, A=(pi)r(squared)?
Is (pi)d(squared) over 4 the correct answer? If so what is the steps to achieving that answer?
Note: A stands for the area of a circle, r stands for radius, and d is for diameter.
Click here to see answer by jim_thompson5910(28593)

Question 175955: Given the line 3x+2y=4, express y in terms of x.
Click here to see answer by nerdybill(6958)

Question 176116: -4x-15=5y
2y=11-5x
Click here to see answer by jojo14344(1512)

Question 176115: -4x-15=5y
2y+11-5x
Click here to see answer by jojo14344(1512)

Question 176150: can you please help me express in radical form: (((x+5=8)))
Click here to see answer by Alan3354(30993)

Question 175049: A rectangular field is 4 times as long as it is wide. Let the width be x and the length will therefore be 4x. if the length is decreased by 10 in. and the width is increased by 2 in. the perimeter will be 80 in. Find the dimensions of the original field.
Click here to see answer by EMStelley(187)

Question 176149: can you please help me express in simplest radical form: (((m^2/n^3)))
Click here to see answer by Alan3354(30993)

Question 176282: Please show me how to solve this system of equations using the substitution method.
3x-11y=2
x-5y=2
Thanks
Click here to see answer by Alan3354(30993)

Question 176262: Please show me how to use the substitution method to solve this system of equations.
3x-11y=2
x-5y=2
Thanks
Click here to see answer by EMStelley(187)

Question 176262: Please show me how to use the substitution method to solve this system of equations.
3x-11y=2
x-5y=2
Thanks
Click here to see answer by MathTherapy(1423)

Question 176308: A> 2x-3y+5y=2
B> 3x+2y-z=12
C> x+4y+z=18

FIRST STEP IN THE ELIMINATION OF THE VARIABLE Y
A) MULTIPLY EQUATION B BY -2 AAND ADD EQUATIONS B AND C
B) MULTIPLY B BY -2 AND ADD EQUAIONS A AND B
C) OTHER, IF SO... HOW?
Click here to see answer by Alan3354(30993)

Question 176351: a(a-3)
Click here to see answer by tutorcecilia(2152)

Question 176373: can you please help me answer this question: (((Express .46 as a fraction in the simplest form. )))
Click here to see answer by EMStelley(187)

Question 176373: can you please help me answer this question: (((Express .46 as a fraction in the simplest form. )))
Click here to see answer by MathLover1(6627)

Question 176369: can you please help me solve this question: (((If one side of a right triangle is 12 and its hypotenuse is 13, what is the length of the other side?)))
Click here to see answer by EMStelley(187)

Question 176372: can you please help me answer: (((How manu rational numbers are there between 5 and 14? )))
Click here to see answer by Mathtut(3670)

Question 176368: can you please help me find the hypotenuse of a right triangle with sides 5 inches and 10 inches.
Click here to see answer by EMStelley(187)

Question 176371: can you please help me answer: (((How many integers are there between 5 and 14?)))
Click here to see answer by Mathtut(3670)

Question 176370: can you please help me solve this question:(((One eighth of the square root of 7 less than a number is 2. what is the number? )))
Click here to see answer by Mathtut(3670)

Question 176453: This is not from a text book. This a work sheet that was created by my teacher. She took the problems from a text book but I don't know which one. The title of the page is Reteaching 7-7 Transforming Formulas. Page number 15 and it is from a Pre-Algebra book copy writed by Prentice-Hall. The directions say to Solve for the indicated variable.
1. y = mx + b, for x
Please, any help on solving this work sheet would be appreciated. I think I may have to use inverse operations to do this but I am not sure where to begin. The whole work sheet doesn't have any numbers. Thank you in advance if you can help.
Click here to see answer by Alan3354(30993)

Question 176456: 4n-12=12-4n

Click here to see answer by EMStelley(187)

Question 172255: One positive number is 8 times another number. Their difference is 70. Find the numbers.
Click here to see answer by EMStelley(187)

Question 176483: Hello :) Please help us evaluate the expression: -2 minus 3, divided by 1/3. Thanks!
Click here to see answer by stanbon(57314)

Question 176644: Solve for the variable given. 63=7u, 19-z=12 and v+27=105

Click here to see answer by Mathtut(3670)

Question 176647: given a rectangle of lenghth land width w,use algebra to show the effect of doubling the dimensions will have on the area.
Click here to see answer by jim_thompson5910(28593)

Question 176775: 2x-3y=-24
x+6y=18
use substitution to solve each system of equations
Click here to see answer by fulio1(4)

Question 176855: a(x-b)/b +3x = 5c/2 SOLVE FOR a and then Same problem different SOLVE FOR x
Instructor created Question
Click here to see answer by ankor@dixie-net.com(15649)

Question 176954: Simplify: x(4x^2+3x-5)-2(4-x^2)
Click here to see answer by jim_thompson5910(28593)

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