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3 years ago

Please help, see pic attachment

Mathematics

1 answer:

S_A_V [24]3 years ago

6 0

Answer:

the answer is 30

Step-by-step explanation:

because it is an equilateral triangle all sides are the same so if you set 3x+15 equal to 7x-5 and solve for x you get 4x=20 and x= 5

when you plug 5 in to each equation you get 30 for both sides and so it proves that the answer is 30

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Who can help me d e f thanks

12345 [234]

$y = (2ax^2 + c)^2 (bx^2 - cx)^{-1}$

Product rule:

$y' = \bigg((2ax^2+c)^2\bigg)' (bx^2-cx)^{-1} + (2ax^2+c)^2 \bigg((bx^2-cx)^{-1}\bigg)'$

Chain and power rules:

$y' = 2(2ax^2+c)\bigg(2ax^2+c\bigg)' (bx^2-cx)^{-1} - (2ax^2+c)^2 (bx^2-cx)^{-2} \bigg(bx^2-cx\bigg)'$

Power rule:

$y' = 2(2ax^2+c)(4ax) (bx^2-cx)^{-1} - (2ax^2+c)^2 (bx^2-cx)^{-2} (2bx - c)$

Now simplify.

$y' = \dfrac{8ax (2ax^2+c)}{bx^2 - cx} - \dfrac{(2ax^2+c)^2 (2bx-c)}{(bx^2-cx)^2}$

$y' = \dfrac{8ax (2ax^2+c) (bx^2 - cx) - (2ax^2+c)^2 (2bx-c)}{(bx^2-cx)^2}$

$y = \dfrac{3bx + ac}{\sqrt{ax}}$

Quotient rule:

$y' = \dfrac{\bigg(3bx+ac\bigg)' \sqrt{ax} - (3bx+ac) \bigg(\sqrt{ax}\bigg)'}{\left(\sqrt{ax}\right)^2}$

$y'= \dfrac{\bigg(3bx+ac\bigg)' \sqrt{ax} - (3bx+ac) \bigg(\sqrt{ax}\bigg)'}{ax}$

Power rule:

$y' = \dfrac{3b \sqrt{ax} - (3bx+ac) \left(-\frac12 \sqrt a \, x^{-1/2}\right)}{ax}$

Now simplify.

$y' = \dfrac{3b \sqrt a \, x^{1/2} + \frac{\sqrt a}2 (3bx+ac) x^{-1/2}}{ax}$

$y' = \dfrac{6bx + 3bx+ac}{2\sqrt a\, x^{3/2}}$

$y' = \dfrac{9bx+ac}{2\sqrt a\, x^{3/2}}$

$y = \sin^2(ax+b)$

Chain rule:

$y' = 2 \sin(ax+b) \bigg(\sin(ax+b)\bigg)'$

$y' = 2 \sin(ax+b) \cos(ax+b) \bigg(ax+b\bigg)'$

$y' = 2a \sin(ax+b) \cos(ax+b)$

We can further simplify this to

$y' = a \sin(2(ax+b))$

using the double angle identity for sine.

7 0

2 years ago

yarga [219]

Answer:

I know this might not be a solid answer but its out of B or C but most likely B because they are all on the side of the triangle so pretty much B

8 0

2 years ago

Find the value of x, o is the centroid

Ray Of Light [21]

Answer:

x = 14

Step-by-step explanation:

In the triangle O is the centroid.

Now, we know that the centroid divides the medians in the 2 : 1 ratio that means the distance from the centroid to the vertex and the distance from the centroid to the opposite side remains in 2 : 1 ratio.

So, from the given diagram we can write

$\frac{3x}{2x - 7} = \frac{2}{1}$

⇒ 3x = 4x - 14

⇒ x = 14 (Answer)

3 0

3 years ago

A device is rated at 1,100 watts.what current is required if it is operated at 110 volts?

WINSTONCH [101]

1 ) Watts =E * I = 110 * 5 = 550 watts =.55 KW

2) I = Watts / e = 1100 / 110 = 10 amperes

3) 1 horsepower = 33000 ft/lbs per minute

HP = ( 2000 * 1000) / (33000 *4) = 15.1515 hp

4) cost = (10 * 100 / 1000) *11 * $0.10 = $1.10

5) This answer will be incorrect because you have not stated the power factor of the motor.

va = I * E = 7.5 * 240 = 1800

2 hp = 2 * 746 watts = 1492 watts

If the motor had a 1.0 power factor (it doesn't) the efficiency would be

efficiency = output / input = 1492 / 1800 = 82.888 %

6) I = watts / E =1000 / 120 = 8.333 amps

7) 1 = watts / E = 1000 / 240 = 4.1616

8) Kw-hr = (2 * 24 * 365 ) / 1000 = 17.52

cost = kw-hr * $0.03 = 17.52 * $0.03 = $0.5256

9) efficiency = (115 * 240) / (2400 * 12) = 95.8333 %

10) KW = (I^2 * R) / 1000 = (20^2 * 5) / 1000 = 2

5 0

3 years ago

What is the median between 1.01 , 0.93, 1.23, 2.01,0.93 0.91

Gnesinka [82]

Answer:

the median is 0.97

Step-by-step explanation:

6 0

4 years ago