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3 years ago

Please help I don’t understand these things

Mathematics

2 answers:

devlian [24]3 years ago

5 0

This means the sum of the measure of these two angles will be 55+x=90
so x=90-55=35

Ratling [72]3 years ago

4 0

x=35

Complementary angles means that the sum of both angles will be 90.
To find the angle of x, we create this simple equation -

55+x=90
90-55=35

x=35

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Julli [10]

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3 years ago

A conical tank (with vertex down) is 10 feet across the top and 12 feet deep. If water is flowing into the tank at a rate of 10

just olya [345]

Answer:

$\frac{dh}{dt}$ ≅ $0.286\frac{ft^{3} }{min}$

Step-by-step explanation:

$V=\frac{\pi }{3}r^{2}h$ ; rate of change $\frac{dV}{dt}=10\frac{ft^{3} }{min}$ , we must find the rate of change of the depth $\frac{dh}{dt} =?;h=8ft$

5h=12r; $V=\frac{\pi }{3}\({\((5h}/12} )} ^{2}h=\frac{\pi }{3}(\frac{25h^{2} }{144})h; V=\frac{25\pi h^{3}}{432}$ ; deriving $\frac{dV}{dt} = \frac{25\pi }{432}(3h^{2})\frac{dh}{dt}$ → $10=\frac{25\pi h^{2}}{144} \frac{dh}{dt}$ → h=8 then $\frac{dh}{dt}=\frac{1440}{25\pi 64}=\frac{9}{10\pi}$ ≅ 0.286 $\frac{ft^{3} }{min}$

3 0

4 years ago

Substitution<br> 2x-2y=14 <br> x-y=2

LiRa [457]

Answer:

<h3>NO solution</h3>

Step-by-step explanation:

You must isolate by substitution to solve this problem.

$\sf{2x-2y=14 \quad x-y=2}$

Separate by x and y from one side of the equation.

Solve with 2x-2y=14, first.

2x-2y=14 which is equal to x=7+y.

Substitute x=7+y.

$\sf{7+y-y=2}$

Then you solve it.

You only need to cross out the variable y.

<u>NO solution.</u>

Therefore, a solution cannot be found.

I hope this helps! Let me know if my answer is wrong or not.

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2 years ago

A store pays $120 for a television. The scores sells the television for $300. What percent of markup did the store use

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Answer: 150% markup

Step-by-step explanation:

Selling price - buying price

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150% of $120 = $180

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4 years ago

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charle [14.2K]

One helpful tool in solving geometric proofs is to work backwards. Looking at theorems related to the figure may also be helpful, to better understand the proof and to check work. Finally, marking the figure to reflect the given statements will help guide the person in determining whether the proof is viable.

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3 years ago

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