Answer:x = 1
y = 1
Step-by-step explanation:
The given system of simultaneous equations is expressed as
3x - 5y = - 2 - - - - - - - - - - - - 1
2x + y = 3 - - - - - - - - - - - - - 2
The first step is to decide on which variable to eliminate. Let us eliminate x. Then we would multiply both rows by numbers which would make the coefficients of x to be equal in both rows.
Multiplying equation 1 by 2 and equation 2 by 3, it becomes
6x - 10y = - 4
6x + 3y = 9
Subtracting, it becomes
- 13y = - 13
y = - 13/- 13 = 1
The next step is to substitute y = 1 into any of the equations to determine x.
Substituting y = 1 into equation 2, it becomes
2x + 1 = 3
2x = 3 - 1 = 2
x = 2/2 = 1
Answer:
Andy gets 7 questions wrong.
Step-by-step explanation:
Let A, B, C and D be the number of questions answered wrong by Andy, Beth, Charlie, and Daniel, respectively.
Andy and Beth together get the same number of questions wrong as Charlie and Daniel together:
Andy and Daniel together get four more questions wrong than Beth and Charlie do together:
Charlie gets five questions wrong:
Solving the linear system:
Andy gets 7 questions wrong.
Step-by-step explanation:
1-(-y^2-4y-8)-(-4y^2-6y+3)
Simplify: 3y^2+2y−11
Subtract: 3y^2+2y-11
2. 2x^2y^3z^2*4xy^4x^2
Simplify: 8x^5y^7z^2
Subtract: 8x^5y^7z^2
3. (x-4) (x^2-5x-6)
Simplify: x^3-9x^2+14x+24
Subtract: x^3-9x^2+14x+24
Tracy average speed is 62.4 miles per hour
Answer: She bought 6 packs of candy
Step-by-step explanation:
she spent $16
$16-$5.50=$10.5
$10.5/$1.75=6
6 x $1.75=$10.5
