3 years ago

Which expression is NOT equivalent to the other three?

Mathematics

1 answer:

Andrew [12]3 years ago

6 0

The answer is C. -6+n+9n

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It is estimated that each guest at a party will eat 2/9

OlgaM077 [116]

Answer:

27 guests

Step-by-step explanation:

1. 1guest=2/9 pounds

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Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq

Arte-miy333 [17]

Answer:

The perimeter of rectangle is $18\ cm$

Step-by-step explanation:

Let

x------> the length of rectangle

y----> the width of rectangle

we know that

The area of the constructed figure is equal to

$A=xy+2x^{2} +2y^{2}\\A=120\ cm^{2}$

$120=xy+2x^{2} +2y^{2}$ -----> equation A

$x=y+5$ -----> equation B

substitute equation B in equation A

$120=y(y+5)+2(y+5)^{2} +2y^{2}\\120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\5y^{2}+25y+50-120=0\\5y^{2}+25y-70=0$

using a graphing calculator to resolve the quadratic equation

the solution is

$y=2\ cm$

Find the value of x

$x=2+5=7\ cm$

Find the perimeter of rectangle

The perimeter of rectangle is equal to

$P=2(x+y)\\P=2(7+2)=18\ cm$

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4 years ago

Solve the following system of equations graphically on the set of axes below.y=-2x-7y=3x-2

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Answer:

(-1, -5)

General Formulas and Concepts:
<u>Algebra I</u>

Coordinate Planes

Coordinates (x, y)
Intersections b/t 2 lines
Graphing

Step-by-step explanation:

Where the 2 lines intersect is the solution to the systems of equations.

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3 years ago