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2 years ago

13

Find the perimeter of -3x+4 2x+7

1 answer:

Alex787 [66]2 years ago

5 0

Assuming that (-3x + 4) and (2x + 7) are two legs of a rectangle, you can find the perimeter like this: P = 2*length + 2*width.

P = 2*(-3x + 4) + 2*(2x + 7)
P = -6x + 8 + 4x + 14
P = -2x + 22

Hope this helps! :)

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Each base of a triangular prism is a right triangle with side lengths 3 inches, 4 inches, and 5 inches. The height of the prism

Artyom0805 [142]

Well, each base has 3*4/2=6 square inches. The lateral faces have 3*7, 4*7 and 5*7 as areas, totalling 12*7=84 square inches on the sides. The bases which total 12 sq. in. are added to the sides to get a total surface area of 96 square inches.

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2 years ago

Please help.. (y-value = ??)

qwelly [4]

<h3>Answer: y = 9</h3>

====================================================

Explanation:

Locate 12 on the horizontal x axis number line.

Then move straight up until reaching the parabola.

Afterward, move to the left to arrive at y = 9 on the vertical y axis.

We predict the y value will be y = 9 for the input of x = 12.

Refer to the diagram below to see what's going on.

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2 years ago

The area of a rectangle is 27 m”, and the length of the rectangle is 3 m less than twice the width. Find the dimensions of the r

elena-s [515]

Answer:

$L = 6$ --- Length

$W = 4.5$ --- Width

Step-by-step explanation:

Given

Let: $L = Length; W = Width$

$Area = 27m^2$

$L = 2W- 3m$

Required

Find the dimensions of the rectangle

Area (A) is calculated as:

$A = L * W$

This gives:

$27 = (2W - 3) * W$

Open bracket

$27 = 2W^2 - 3W$

Express as a quadratic function

$2W^2 - 3W - 27 = 0$

Expand

$2W^2 + 6W - 9W - 27 = 0$

Factorize:

$2W(W + 3) - 9(W + 3) = 0$

$(2W - 9)(W + 3) = 0$

This gives:

$2W - 9 = 0\ or\ W + 3 = 0$

$2W = 9 \ or\ W = -3$

Width can not be negative.

So:

$2W = 9$

$W = 4.5$

Recall that:

$L = 2W- 3m$

$L = 2 * 4.5 - 3$

$L = 6$

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2 years ago

Math Help Help Fast Alot of points

MrMuchimi

Here mark the angles

m<FHG=75
m<FGH=55
m<GHI=59°
m<GIH=63°

By using angle sum property

m<IGH=180-122=58

So

m<FGH < m<IGH <m<GHI <m<GIH <m <FHG

So

FH<IH<GI<GH<FG

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2 years ago

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Mkey [24]

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