Answer:
Step-by-step explanation:
a. 3-4x=-7-4x
3=-7. no solution
b. 15 - 2x = -7x
15 = -5x
x=-3. one solution
c. 7y-21=6y-21
y=0
1. -3x+4=-3x+7
4=7
2. 10+2x = 5x+2
8=3x
x=3/8
3. x+5=x+5
$91 because 10% of 70 is $7 and 20% of 70 is $14 so 7+14+70= $91
The perimeter of the trapezoid is y=2
3x+y=−11
3x+y+−3x=−11+−3x(Add -3x to both sides)
y=−3x−11
2x+2y=−10
2x+2(−3x−11)=−10
−4x−22=−10(Simplify both sides of the equation)
−4x−22+22=−10+22(Add 22 to both sides)
−4x=12
−4x
−4
=
12
−4
(Divide both sides by -4)
x=−3
y=−3x−11
y=(−3)(−3)−11
y=−2(Simplify both sides of the equation)
Answer:
x=−3 and y=−2
D.(-3,-2)
The correct answer is: [C]: " 18 " {" 18 units " .} .
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Explanation:
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Add up the given areas, to get the total area of the given polygon:
3 + 5 + 8 + 2 =
(3 + 5) + 8 + 2 =
8 + 8 + 2 =
(8 + 8) + 2 =
16 + 2 =
" 18 " . The answer is: " 18 (units) " ; which is: Answer choice: [C]: " 18 " .
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