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2 years ago

I've checked everywhere and I cant figure out what this is.it's not 9.4, I tried.

Mathematics

2 answers:

GarryVolchara [31]2 years ago

7 0

8.5? Give that a try!:)
What I did was I took a piece of paper, and listen those numbers from least to greatest, then I scratched off one number per side, till I got to the middle. From there, I added 8 and 9, the divided by 2. There, I got 8.5

ASHA 777 [7]2 years ago

5 0

I got 8.5 too try that . Because both of us got that

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One step equations integers 8y = 48

lbvjy [14]

Answer:

y=6

Step-by-step explanation:

divide both sides by 8: 8y/8=48/8

y=6.

4 0

2 years ago

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How do I use substitution to integrate x*sqrt 3x^2+4?

katrin2010 [14]

Finding the indefinite integral by substitution:

$\large\begin{array}{l} \mathsf{\displaystyle\int x\sqrt{3x^2+4}\,dx}\\\\ =\mathsf{\displaystyle\int \frac{1}{6}\cdot 6x\sqrt{3x^2+4}\,dx}\\\\ =\mathsf{\displaystyle \frac{1}{6}\int\sqrt{3x^2+4}\cdot 6x\,dx\qquad\quad(i)} \end{array}$

$\large\begin{array}{l} \textsf{Substitute}\\\\ \mathsf{3x^2+4=u~~\Rightarrow~~6x\,dx=du}\\\\\\ \textsf{then (i) becomes}\\\\ =\mathsf{\displaystyle \frac{1}{6}\int\sqrt{u}\,du}\\\\ =\mathsf{\displaystyle \frac{1}{6}\int u^\frac{1}{2}\,du}\\\\ =\mathsf{\dfrac{1}{6}\cdot \dfrac{u^{\frac{1}{2}+1}}{\frac{1}{2}+1}+C} \end{array}$

$\large\begin{array}{l} =\mathsf{\dfrac{1}{6}\cdot \dfrac{~u^{\frac{3}{2}}~}{\frac{3}{2}}+C}\\\\ =\mathsf{\dfrac{1}{6}\cdot \dfrac{2}{3}\,u^{\frac{3}{2}}+C}\\\\ =\mathsf{\dfrac{1\cdot 2}{6\cdot 3}\,u^{\frac{3}{2}}+C}\\\\ =\mathsf{\dfrac{1\cdot \diagup\!\!\!\! 2}{\diagup\!\!\!\! 2\cdot 3\cdot 3}\,u^{\frac{3}{2}}+C}\\\\ =\mathsf{\dfrac{1}{9}\,u^{\frac{3}{2}}+C} \end{array}$

$\large\begin{array}{l} \textsf{Substitute back for }\mathsf{u=3x^2+4:}\\\\ =\mathsf{\dfrac{1}{9}\,(3x^2+4)^{\frac{3}{2}}+C}\\\\\\ \therefore~~\boxed{\begin{array}{c} \mathsf{\displaystyle\int x\sqrt{3x^2+4}\,dx=\frac{1}{9}\,(3x^2+4)^{\frac{3}{2}}+C} \end{array}}\qquad\checkmark \end{array}$

If you're having problems understanding this answer, try seeing it through your browser: brainly.com/question/2097209

$\large\textsf{I hope it helps.}$

Tags: definite integral integrate limits function irrational square root sqrt composite substitution integral calculus

3 0

3 years ago

Bella leans a 20-foot ladder against a wall so that it forms an angle of 76° with the ground. What’s the horizontal distance bet

seropon [69]

Answer:

4.8 feet

Step-by-step explanation:

Use the cosine ratio, since we are given the length of the hypotenuse (the ladder) and are asked to find the horizontal distance between it and the ground.

Let x represent the horizontal distance (the adjacent leg)

cosine θ = adjacent / hypotenuse

cosine 76° = x / 20

(20)(cosine 76°) = x

4.8 = x

So, the horizontal distance is approximately 4.8 feet

8 0

3 years ago

What is the measure of ∠PQS ?

nikdorinn [45]

Where is the diagram?

4 0

3 years ago

Can someone help me with this?

igor_vitrenko [27]

Answer:

a) BD = 5

b) FD = 13

Step-by-step explanation:

For both questions we follow pythagoras therom.

For the first one we do 3^2 +4^2 = 25 and then we root this answer to 5

For the second we have to find the base of GD in order to find FD. GD will be 4^2+12^2 which equals to 160 and then you root.

Finally, we can find FD which is sqaure root of 160^2 + 3^2 = 169. The square root of 169 is 13. Answer is 13.

4 0

3 years ago

Read 2 more answers

I've checked everywhere and I cant figure out what this is.it's not 9.4, I tried.​

I've checked everywhere and I cant figure out what this is.it's not 9.4, I tried.