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

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Algebra: Expressions involving variables, substitution

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Question 64523: Solve for the Variable: 3x2^ + 4x = 0
a) 0 only
b) 0 or 3/4
c) 0 or 4/3
d) 0 or -4/3
e) None of these
Click here to see answer by Earlsdon(4898)

Question 64522: Solve for the variable: 2x2^ + 8x = 0
a) 0 or 4
b) 0 only
c) 4 only
d) 0 or -4
e) None of these
Click here to see answer by checkley71(8405)

Question 64666: use elimination to solve the system 3x+5y=16 and 8x-5y=28 for x
Click here to see answer by tutorcecilia(2042)

Question 64664: if x=5y-1 and 2x+5y=-32 what is the value for y
a.-2
b.2
c.1
d.-1
Click here to see answer by tutorcecilia(2042)

Question 64669: use elimination to solve the system 4x+7y=-14 and 8x+5y=8 for x
Click here to see answer by checkley71(8405)

Question 64730This question is from textbook Algebra 1
: y+2x=-1
y-4=-2xThis question is from textbook Algebra 1

Click here to see answer by 303795(562)

Question 64734: The sum of two numbers is 82. Their difference is 24. Write a system of equations that describes this situation. Solve by elimination to find the two numbers.
Click here to see answer by 303795(562)

Question 64771: the substitution method should be used to solve which system of equations
a.5x-7y=16
2x-7y=12
b.4x+3y=-5
6x-3y=2
c.x=3y+1
2x+y=7
d.2x+6y=3
3x+2y=-1
Click here to see answer by Edwin McCravy(2920)

Question 64782: use elimination to solve the system x-4y=1 and x+2y=19 for x
a.-11
b.3
c.24
d.13
Click here to see answer by 303795(562)

Question 64768: when solving the system of equations, 3x+y=14
which expression could be substituted x+4y=3
for y in the second equation?
a.3-4y
b.3-x/4
c.14-y/3
d.14-3x
Click here to see answer by 303795(562)

Question 64667: use elimination to solve the system x-4y=1 and x+2y=19 for x
Click here to see answer by 303795(562)

Question 64810This question is from textbook HOUGHTON MIFFLIN Math Steps
: fuck thisThis question is from textbook HOUGHTON MIFFLIN Math Steps

Click here to see answer by abubaka(1)

Question 64873This question is from textbook algebra 1
: Determine the best method to solve the system .Then solve for x and y.
2x+y=3x-15
x+5=4y+2xThis question is from textbook algebra 1

Click here to see answer by checkley71(8405)

Question 64867This question is from textbook algebra 1
: solve for x and y
3x+1=-7y
6x+7y=0This question is from textbook algebra 1

Click here to see answer by checkley71(8405)

Question 64871: The sum of the digits of a two-digit number is 9. The value of the number is 12 times the tens digit. Find the number
Click here to see answer by ankor@dixie-net.com(6691)

Question 64897: Evaluate b2 – 2bc + c2 if b = 3 and c = –2
Click here to see answer by checkley71(8405)

Question 64905: How can i divide the following?
40p9q3
40p8q3

5p8q3
5p9q3
Click here to see answer by checkley71(8405)

Question 64872This question is from textbook algebra 1
: Determine the best method to solve the system .Then solve for x and y.
2x+y=3x-15
x+5=4y+2xThis question is from textbook algebra 1

Click here to see answer by ptaylor(1578)

Question 64899: how do i solve
Click here to see answer by funmath(2873)

Question 65014This question is from textbook UCSMP Algebra Second Addition

: What is A=1/2*(b1+b2)*h in solving for the variable h?This question is from textbook UCSMP Algebra Second Addition

Click here to see answer by stanbon(26259)

Question 64769:
Click here to see answer by madhujiithcharu@yahoo.co.in(28)

Question 64773: solve the system and find the value of y
2x+3y=1
5x-4y=-32
a.-8 3/7
b.8 3/7
c.-3
d.3
Click here to see answer by madhujiithcharu@yahoo.co.in(28)

Question 65022: I cant figure out this word problem: Five times a number is 21 less than twice the opposite of the number. What is the number?
Click here to see answer by 303795(562)

Question 64865This question is from textbook algebra 1
: solve for x and y
3x+1=-7y
6x+7y=0This question is from textbook algebra 1

Click here to see answer by ptaylor(1578)

Question 65097: How do I write an algebraic equation for the English statement then “Subtract 5 from the sum of x and 7 times 3 and the result is 20.” how can this compare to an equation?
The English statement is ambiguous. How do I write another English statement that leads correctly to more than one algebraic equation. or what examples can I use?
Click here to see answer by stanbon(26259)

Question 65164: 5x+ 8 + 3x- x + 5 = 6x- 3
Click here to see answer by stanbon(26259)

Question 65168This question is from textbook
: What are the excluded values of n in the expression n+5/(8-n)(n+3) x n-9/2n-3?
Thank you for your time!This question is from textbook

Click here to see answer by stanbon(26259)

Question 65169This question is from textbook
: The perimeter of a rectangle is 36cm. Its area is 72cm^2. Find the dimensions of the rectangle.
Thank you for your time!This question is from textbook

Click here to see answer by stanbon(26259)

Question 65171: - 3x =27
Click here to see answer by stanbon(26259)

Question 65173: 6x – 1 – 2x = 3
5 3

Click here to see answer by stanbon(26259)

Question 65174: -4(2x – 3) = -8x + 5
Click here to see answer by stanbon(26259)

Question 65177: Rose’s garden is in the shape of a trapezoid. If the height of the trapezoid is 16 m, one base is 20 m, and the area is 224 m 2 , find the length of the other base
Click here to see answer by Earlsdon(4898)

Question 65170: 5x+ 8 + 3x- x + 5 = 6x- 3
Click here to see answer by checkley71(8405)

Question 65179: Jody earns $140 more per month than Frank. If their monthly salaries total $2760, what amount does each earn?
Click here to see answer by checkley71(8405)

Question 65172: 3 x = 15
7

Click here to see answer by checkley71(8405)

Question 65176: D = C – s (for s)
n

Click here to see answer by mszlmb(115)

Question 65180: The Randolphs used 12 more gal of fuel oil in October than in September and twice as much oil in November as in September. If they used 132 gal for the 3 months, how much was used during each month?
Click here to see answer by josmiceli(3003)

Question 65182: 2x+3y=6 (for x)
Click here to see answer by funmath(2873)

Question 65183: A = 1h(B + b) (for b)
2

Click here to see answer by funmath(2873)

Question 64832This question is from textbook An Incremental Development

: Solve the system by graphing and then get an exact solution by using either substitution or elimination :
2x - y = -1
6x + 3y = 0This question is from textbook An Incremental Development

Click here to see answer by rchill(405)

Question 65216: simplify (5xsquared-8xy+2ysquared)+(-xsquared-9ysquared)
Click here to see answer by funmath(2873)

Question 65247: The perimeter of a triangle is 50 centimeters. Side b is 4 centimeters longer than side a. Side c is 9 centimeters shorter than three times the length os side a. find the length of each side.
Click here to see answer by funmath(2873)

Question 65245: 5(4x-2)=x+4
Click here to see answer by funmath(2873)

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