9514 1404 393
Answer:
- to eliminate x: multiply the first by 3, and the second by -4
- to eliminate y: multiply the first by 2, and the second by 5
Step-by-step explanation:
Pick the variable you want to eliminate. Determine the coefficients of that variable in the two equations. Negate one of them. Multiply each equation by the coefficient that came from the other equation.
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<u>To eliminate x</u>
The x-coefficients are 4 and 3. If we negate 4, then the resulting y-coefficient will be positive. We choose to multiply the first equation by 3, the second by -4.
Here is the result of adding those:
3(4x +5y) -4(3x -2y) = 3(7) -4(-12) ⇒ 23y = 69
<u>To eliminate y</u>
The y-coefficients are 5 and -2. If we negate -2, then the resulting x-coefficient will be positive. We choose to multiply the first equation by 2 and the second by 5.
Here is the result of adding those:
2(4x +5y) +5(3x -2y) = 2(7) +5(-12) ⇒ 23x = -46
1. 3.0
2. 1.0
3. 18.0
5. 6.0
6. 10.0
7. 9.0
Answer:
less
Step-by-step explanation:
because 1.3= 1 3/10 and 1 3/5 is equal to 1 6/10 there for it less than
The number of solutions of an algebraic equation equals the value of the exponent with the highest power.
Therefore, the answer is 11.
