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2 years ago

A cell phone is 9 centimeters long. If the area of the cell phone is 45 square centimeters, what is the width of the cell phone?

Mathematics

2 answers:

____ [38]2 years ago

3 0

The width is 5 centimeters

marshall27 [118]2 years ago

3 0

5 I believe because if the formula for area it length×width then its 9×?=45. so you would divide 45 by 9 to get your answer. so the answer is 5.

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What is the value of x A. 20 B. 34 C. 60 D. 69

Grace [21]

Answer:

Step-by-step explanation:

The given angles are vertical and thus congruent, so

3x = x + 40 ( subtract x from both sides )

2x = 40 ( divide both sides by 2 )

x = 20 → A

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3 years ago

I need the answer for number 6 please:)

Goshia [24]

Answer: 12.5

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and so does

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3 years ago

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katrin2010 [14]

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2 years ago

A 100-foot rope from the top of a tree house to the ground forms a 45∘ angle of elevation from the ground. How high is the top o

DochEvi [55]

Answer:

The height of tree house is 70.71 feet

Step-by-step explanation:

We are given that A 100-foot rope from the top of a tree house to the ground forms a 45∘ angle of elevation from the ground

Refer the attached figure

Length of rope AC = Hypotenuse =100 feet

The top of a tree house to the ground forms a 45∘ angle of elevation from the ground = $\angle ACB = 45^{\circ}$

We are supposed to find the height of tree house i.e.AB = Perpendicular

So, Using trigonometric ratio

$Sin \theta = \frac{perpendicular}{Hypotenuse}\\Sin 45= \frac{AB}{AC}\\\frac{1}{\sqrt{2}}=\frac{AB}{100}\\100 \times \frac{1}{\sqrt{2}}=AB\\70.71=AB$

Hence The height of tree house is 70.71 feet

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3 years ago

PLEASE HELP ASAP WILL MARK BRAINLIEST!!

Papessa [141]

Answer:

Prime.

Step-by-step explanation:

$x^2-7x+8\\$

First let's multiply our outer coefficients in this case 1 and 8, so we have 1x8=8. Now the point of this is to get the factors of 8 and see if we can get that middle term -7. Factors of 8 are 1x8, 2x4 and that's it. From there I notice that -8+1 = -7 and so:

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Notice that the (x-8) and (x+8) are not the same factors, therefore the factors are not any of those answer choices and so it's prime. You can calculate the factors by using the quadratic formula, however I think that is beyond the scope of this question.

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3 years ago