Answer: 3x+y=-9
Step-by-step explanation:
Step 1 is distribute y+6 = -3(x+1)
y+6 =-3x-3
Mow you have to move your x over because standard form is Ax+By=C
y+6+3x =-3
Move your +6 by subtracting from both sides
3x+y=-9
Answer: x=−5 or x=5
Step-by-step explanation:
−3x4+27x2+1200=0
Step 1: Factor left side of equation.
−3(x2+16)(x+5)(x−5)=0
Step 2: Set factors equal to 0.
x2+16=0 or x+5=0 or x−5=0
x=−5 or x=5
F you divide 249 by 32, you get 7.78125.
So it's easier to calculate if you figure out how much time it took her to finish 25% of the wall. Since it took her 45 minutes to do 75%, it took her 15 minutes to do 25%. Then you just multiply.
Therefore, it takes her 60 minutes to finish building her wall.