Use substitution.
y = 2 - x and y = 4x + 7 can become
2 - x = 4x + 7
Now solve for x
-5 = 5x
-1 = x
Now plug -1 for x in either equation.
y = 2 - x -> y = 2 - (-1) -> y = 3
y = 4x + 7 -> y = 4*-1 + 7 -> y = -4 + 7 -> y = 3
So C) is the correct answer.
Answer:
g(x)=-x-5
Step-by-step explanation:
Simplify parenthesis by distribution:
g(x)=-x-3+2-4
Addition and Subtraction:
-3+2=-1, -1-4=-5
Finalize since no more simplification:
g(x)=-x-5
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(x+3) (2x-1)
So first, you want to combine the x's. To do this, count the x in (x+3) as 1. So the x's combined are equal to 3x. Now, combine the 3 and -1. This expression simplified is equal to [ (3x+2) ]
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
x-(3*x^3+8*x^2+5*x-7)=0
Step by step solution :<span>Step 1 :</span><span>Equation at the end of step 1 :</span><span><span> x-((((3•(x3))+23x2)+5x)-7) = 0
</span><span> Step 2 :</span></span><span>Equation at the end of step 2 :</span><span> x - (((3x3 + 23x2) + 5x) - 7) = 0
</span><span>Step 3 :</span><span>Step 4 :</span>Pulling out like terms :
<span> 4.1 </span> Pull out like factors :
<span> -3x3 - 8x2 - 4x + 7</span> =
<span> -1 • (3x3 + 8x2 + 4x - 7)</span>
Checking for a perfect cube :
<span> 4.2 </span> <span> 3x3 + 8x2 + 4x - 7</span> is not a perfect cube
Trying to factor by pulling out :
<span> 4.3 </span> Factoring: <span> 3x3 + 8x2 + 4x - 7</span>
Thoughtfully split the expression at hand into groups, each group having two terms :
Group 1: <span> 3x3 - 7</span>
Group 2: <span> 8x2 + 4x</span>
Pull out from each group separately :
Group 1: <span> (3x3 - 7) • (1)</span>
Group 2: <span> (2x + 1) • (4x)</span>