66 Answered Questions for the topic Substitution

Substitution

06/24/18

The total weight of 2 red blocks and 6 green blocks is 23 ounces.The total weight of 3 red blocks and 4 green blocks is 22 ounces. what’s the total weight of 1
Please include how to solve What’s the total weight of 1 green and red block
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06/15/18

Systems of linear and quadratic equations
solve the system. Enter the point that is furthest to the left first. y=-x2-x+19 y+80=x   I currently Have the first Part done which is (-11,-91)   I have the x coord of the second one which... more
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06/04/18

how do i solve this equation for B whilst removing D from the equation : 1/a = b/c +d/e
basic algebra
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Substitution Estimation

05/17/18

a total of 60 hand weights some of the weights are 3 pounds and the rest are 5 pounds if there are 10 more 5 pound weights then 3 pound weight how many of each
it is the gym instructor and i need help solving this problem. i don't know how to find the equations 
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Substitution Word Problem

04/10/18

Solve a system of equations using substitution
Andrew and his little sister are saving up money to buy a joint birthday present for their mother. Andrew already has $27 saved and plans to save $14 per week from his allowance. His sister has $21... more
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Substitution Systems Of Equations

03/22/18

How do you solve this System of Equations?
Levi purchased a total of 50 ride and game tickets and the amusement park and spent $29. if ride tickets cost 75 cents each and game tickets cost 50 cents each, how many ride tickets did he purchase?
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Substitution

03/18/18

The sum of two numbers is 18. The difference between three times the lesser number and the greater number is 10.
so confused, help please!
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Substitution

02/27/18

Linear systems substitution
Y =3x+2 y=-3x-4
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Substitution

01/25/18

How to solve y=-2x - 1. y=-4x- 5
I need an answer and how to solve it. Only because I struggle at it in pre algebra. Iwould like it if y’all helped   
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Substitution

10/31/17

Substitution word problem
a student bought 1 box of crayons and 5 reams of paper for $54. She bought 5 boxes of crayons and 3 reams of paper for $50. What is the cost of each vox of crayons and each ream of paper?
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07/06/17

Substitution/Elimination Form
Substitution Form: 2x-3y=2 x+y=-1 x+y=-1   Elimination From:  2x/3 - 4y/5 = 1 and 3x-y=-7
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05/25/17

3x-2y=-7. Y=x+4
Use substitution to solve the system of equations 
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Substitution

02/15/17

I am learning about substitutions. The equations are -3x+6y=4 and 2x+y=4.
So I tried doing the equation out and I got fractions for the ordered pairs. I got x=4/3 and y=20/3. Our teacher has us do checks so when I checked the problem out it didn't work out. 
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Substitution

02/12/17

You sell small candles for $4 each and large candles for $6 each. You collect $144 selling a total of 28 candles. How many of each type of candle did you sell?
Method that must be used is by substitution 
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Substitution

12/03/16

substitution word problem
For this problem, I know how to solve it, but can't set it up. I have  x+y=3000 0.70x+0.35y=(0.58)(300) but it's quite right. Thanks!   A silversmith has two alloys, one containing 70% silver... more
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08/22/16

Solve system by substitution
The school that Anjali goes to is selling tickets to a play. On the first day of ticket sales the school sold 11 senior citizen tickets and 14 child tickets for a total of $211. The school took in... more
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Substitution Infinite Sums

08/21/16

What is x equal to in this equation
1=sqrt(x+sqrt(x+sqrt(x+sqrt(x+... Using a substition, it seems you can get 1=sqrt(x+1), but that leads to x=0, which seems wrong when you plug it back into the original equation.
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Substitution Analytic Geometry

08/14/16

Solve the following linear system (substitution)
Solve the following linear system (substitution)    2x-5y=12 x+10y=-9
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Substitution

05/08/16

The sum of two numbers is 12. Four times the smaller number is two less than the larger. What are the two numbers?
Solve by substitution
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Substitution Math

03/08/16

how would you substitute x=-4y and 3x + 2y = 20
I need help on a really hard problem it's substitution equations  
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Substitution

01/27/16

-x+y=4 and 3x-2=-7
Substitution finding x and y
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Substitution Substitution Method

01/18/16

Solve the system of equations using substitution...
y=-6x+21 -3x-3y=-18
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Substitution Math Algebra Equation

10/18/15

please help
Use substitution to solve the following system of equations:   4x-y=5 2x+3y=-8
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10/15/15

Linear Systems Word Problem
Josie wants to buy Internet access. One service provider charged a flat rate of $34.95/month. A second charges $25/month plus $0.33/hour. For what number of hours per month should Josie choose the... more
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Substitution Math Calculus Integrals

08/16/15

integrating
when integrating ∫sin3xdx, a good first move would be to:   a) use u-substitution, letting u=sinx, and then integrating ∫u3du   b) use u-substitution, letting u=sin2x   c) rewrite the problem... more
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