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3 years ago

Anyone know this?I need helppp

Mathematics

2 answers:

Fittoniya [83]3 years ago

8 0

Answer:

nope sorry

Step-by-step explanation:

EastWind [94]3 years ago

3 0

Answer:

just think hard about it. if you can't get any answers. just guess! try your best. good luck! its what i always do in these type of situations.

Step-by-step explanation:

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Answer:

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3 years ago

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Derivative of these questions

shtirl [24]

Answer: $\bold{y'=\dfrac{1}{2(a-b)^2}\bigg(\dfrac{1}{\sqrt{x+a}}+\dfrac{1}{\sqrt{x+b}}\bigg)}$

Step-by-step explanation:

$y=\dfrac{1}{\sqrt{x+a}-\sqrt{x+b}}\\\\\\\text{Rationalize the denominator:}\\y=\dfrac{1}{\sqrt{x+a}-\sqrt{x+b}}\bigg(\dfrac{\sqrt{x+a}+\sqrt{x+b}}{\sqrt{x+a}+\sqrt{x+b}}\bigg)\\\\\\y=\dfrac{\sqrt{x+a}+\sqrt{x+b}}{x+a-x-b}\\\\\\y=\dfrac{\sqrt{x+a}+\sqrt{x+b}}{a-b}\\\\\\\text{Apply the derivative (derivative of the numerator (top) divided by the}\\\text{denominator (bottom) squared).}$

$\text{Derivative of }\sqrt{x+a}\quad \rightarrow \quad (x+a)^{\frac{1}{2}}\quad = \quad \dfrac{1}{2}(x + a)^{-\frac{1}{2}}\\\\\text{Derivative of }\sqrt{x+b}\quad \rightarrow \quad (x+b)^{\frac{1}{2}}\quad = \quad \dfrac{1}{2}(x + b)^{-\frac{1}{2}}\\\\\\\text{Derivative of}\ \dfrac{\sqrt{x+a}+\sqrt{x+b}}{a-b}:\\\\= \dfrac{\dfrac{1}{2}(x + a)^{-\frac{1}{2}}+\dfrac{1}{2}(x + b)^{-\frac{1}{2}}}{(a-b)^2}$

$\text{Factor out }\dfrac{1}{2}\ \text{from the numerator:}\\\\\dfrac{(x+a)^{-\frac{1}{2}}+(x+b)^{-\frac{1}{2}}}{2(a-b)^2}\\\\\\\text{Move the terms with negative exponents to the denominator:}\\\\=\dfrac{1}{2(a-b)^2}\bigg(\dfrac{1}{\sqrt{x+a}}+\dfrac{1}{\sqrt{x+b}}\bigg)$

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3 years ago

Geometry Help! 30 POINTS! + BRAINLIEST

Triss [41]

SRT = 20 => STR = 20.
Since STR and STU are supplementary angles, STU = 180 - STR = 180 - 20 = 160, means x = 40.

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4 years ago

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NNADVOKAT [17]

Answer:

(a) The amount of pure acid in 60 oz of 20% acid solution is 12 oz.

(b) The amount of pure acid in 60 oz of 25% acid solution is 15 oz.

(d) The amount of pure acid in 60 oz of 50% acid solution is 30 oz.

Step-by-step explanation:

* Lets explain how to solve the problem

- The solution is a mixture of two or more substances

- A container of liquid contains 60 oz of solution

- The solution contains pure acid by different concentrations

- (a) 20% (b) 25% (c) 30% (d) 50%

- We want to find the number of ounces of the pure acid in each

concentration

- Assume that the solution is 100%

- That means 100% represents 60 oz of solution

- The percentage of pure acid is 20%

∵ solution ⇒ pure acid

100% 20%

60 The number of ounces

- By using cross multiplication

∴ The number of ounces = $\frac{60*20}{100}= 12$

(a) The amount of pure acid in 60 oz of 20% acid solution is 12 oz.

- The percentage of pure acid is 25%

∵ solution ⇒ pure acid

100% 25%

60 The number of ounces

- By using cross multiplication

∴ The number of ounces = $\frac{60*25}{100}= 15$

(b) The amount of pure acid in 60 oz of 25% acid solution is 15oz.

- The percentage of pure acid is 30%

∵ solution ⇒ pure acid

100% 30%

60 The number of ounces

- By using cross multiplication

∴ The number of ounces = $\frac{60*30}{100}= 18$

(c) The amount of pure acid in 60 oz of 30% acid solution is 18 oz.

- The percentage of pure acid is 30%

∵ solution ⇒ pure acid

100% 50%

60 The number of ounces

- By using cross multiplication

∴ The number of ounces = $\frac{60*50}{100}= 30$

(d) The amount of pure acid in 60 oz of 50% acid solution is 30 oz.

3 0

3 years ago

The units’ digit of a two-digit number is 5 more than the tens’ digit, and the number is three times as great as the sum of the

solniwko [45]

Answer:

The number is 27

Step-by-step explanation:

Let the 10s digit be x

Let the units digit be y

y = x + 5

10x + y = 3(x + y) Remove the brackets

10x + y = 3x + 3y Substitute the x + 5 into the second equation for y

10x + x + 5 = 3x + 3(x + 5) Remove the brackets on the right.

10x + x + 5 = 3x + 3x +15 Collect like terms on each side.

11x + 5 = 6x + 15 Subtract 5 from both sides

11x + 5 - 5 = 6x + 15 - 5 Collect like terms

11x = 6x + 10 Subtract 6x from both sides

11x - 6x = 6x - 6x + 10

5x = 10 Divide by 5

5x/5 = 10/5

x = 2

y = x + 5

y = 2 + 5

y = 7

3 0

3 years ago