3 years ago

Is 2(3a-2)+4a equivalent to 10a-2

Mathematics

1 answer:

Nezavi [6.7K]3 years ago

5 0

No it’s equal to 10a-4

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Julie will build a rectangular pen for her dog against a barn. A wall from the barn will form one side of the pen. She has 32 m

MAXImum [283]

Answer:

<h3> The width (side perpedicular to the barn): <u>x = 8 m</u></h3><h3> The lenght (side parallel to the barn): <u>y = 16 m</u> </h3>

Step-by-step explanation:

x - the width of the barn

She has 32 m of fencing so for the lenght remain (32-2x) m of fencing:

y = 32 - 2x

Area of the fencing: A = x•y

A(x) = x•(32 - 2x)

A(x) = -2x² + 32x ← quadratic function

The maximum value of quadratic function occurs at: $x=-\frac b{2a}$

a = -2, b = 32

$x=-\frac b{2a}=-\frac{32}{2\cdot(-2)}=-(-8)=8$

32-2x = 32 - 2•8 = 16

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2 years ago

Solve. x /5 + 3 = 2 A) -5 B) 25 C) 5 D) - 1/5 <br><br> help me

Ilia_Sergeevich [38]

X/5 + 3 = 2
x+15=10
x=-5
Ans : A

8 0

2 years ago

F(x)=3(x+5)+4/x, what is f(a+2)

likoan [24]

the answer would be= -2fx+3x^2+15+a/fx

8 0

2 years ago

Does a plane contains at least two non-collinear points.

Ganezh [65]

There could be collinear but need to be on the same plane

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2 years ago

help? 8th grade work. Find the slope and the y -intercept of the graph of y= -2x +1. The slope is The y -intercept is

grandymaker [24]

Answer:

Slope: -2

Y-Intercept: (0,1)

Step-by-step explanation:

The slope would be m. In this case our m is -2, so our slope is -2.

For the y-intercept, you just look at the constant. So our constant is 1, so the y-intercept is (0,1)

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2 years ago