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Bingel [31]
2 years ago
5

Combine k/4 and 5k pls pls pls pls

Mathematics
2 answers:
elena55 [62]2 years ago
8 0
Your answer is 21k/4
slega [8]2 years ago
6 0

\dfrac k4 + 5k = \dfrac{k + 20k}4 = \dfrac{21k}4

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Alex_Xolod [135]

Answer:

the answer is B.

Step-by-step explanation:

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2 years ago
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PLEASE HELP
laila [671]
<h3><u>Option A</u></h3>

4 x^{2}+32 x-80=0 is the required equation to calculate width of rectangular frame that has a total area of 140 square inches.

<h3><u>Solution:</u></h3>

Given that,

Length of a rectangular frame is given as 2x + 10

Width of the rectangular frame is given as 2x + 6

Total area = 140 square inches

<em><u>The area of rectangular frame is given as:</u></em>

\text {area of rectangle}=\text {length } \times \text {width}

Plugging in values, we get

\begin{array}{l}{(2 x+10)(2 x+6)=140} \\\\ {4 x^{2}+12 x+20 x=80} \\\\ {4 x^{2}+32 x-80=0}\end{array}

This is the required equation to calculate width of rectangular frame

Solve the above quadratic equation to get the value of "x"

4 x^{2}+32 x-80=0

<em><u>Use the quadratic equation formula:</u></em>

x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}

Here a = 4 ; b = 32 ; c = -80

x=\frac{-32 \pm \sqrt{32^{2}-4(4)(-80)}}{2(4)}

x=\frac{-32 \pm \sqrt{2304}}{8}

x = 2 or x = -10

Now measurement cannot be negative, so taking the positve value of "x", we can calculate the width

So put "x" = 2

Width of the rectangular frame = 2x + 6 = 2(2) + 6 = 10

Thus the width of frame is 10 inches

4 0
3 years ago
6.
PilotLPTM [1.2K]

Answer:

y=-2x-4

Step-by-step explanation:

The slope has a Y-intercept at the -4, which narrows the choices down to 2. Since the slope is leaning left, it's a negative, which will make the answer to this y=-2x-4

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I think it has to be 45.
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How to find lateral surface and total surface area of triangular prism​
mote1985 [20]

Answer:

using the formula ...........duh

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2 years ago
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