Answer:
Step-by-step explanation:
LAST ONE
9514 1404 393
Answer:
Step-by-step explanation:
If we let x and y represent the costs of a lamp and end table, respectively, the two purchases can be written as ...
3x +2y = 520
2x -y = 20
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These equations can be solved many ways. If we use "elimination", we can add twice the second equation to the first to eliminate y:
(3x +2y) +2(2x -y) = (520) +2(20)
7x = 560 . . . . simplify
x = 80 . . . . . . divide by 7
y = 2x -20 = 2(80) -20 = 140
The cost of a lamp is $80; the cost of an end table is $140.
5apples= 2pounds
20apples=?pounds
5apples *4 =20 apples
2 pounds*4 =8 Pounds
It takes 8 pounds of Apples to make 20 Apple pies.
The answer for this problem is x=-2 or x=3.
<em>To solve, start with the equation.</em>
0=x^2−x−6
<em>Subtract x^2-x-6 from both sides.
</em>
0−(x^2−x−6)=x^2−x−6−(x^2−x−6)
−x^2+x+6=0
<em>Factor left side of equation.
</em>
(−x−2)(x−3)=0
<em>Set factors equal to 0.
</em>
−x−2=0 or x−3=0
x=−2 or x=3
