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4 years ago

WILL GIVE BRAINLIEST!! Solve for x. 2x^2−8x+5=0

Mathematics

1 answer:

olga nikolaevna [1]4 years ago

7 0

I'm almost certain x = 1.25 might be wrong but I got it both times..

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Explain how to find the product 3^5 x 3^2 using rules for exponents.

AlekseyPX

Step-by-step explanation:

$\because \: {a}^{m} \times {a}^{n} = {a}^{m + n} \\ \\ \therefore \: {3}^{5} \times {3}^{2} = {3}^{5 + 3} = {3}^{8} = 6,561 \\$

7 0

4 years ago

Determine the equivalent system for the given system of equations. 4x - 5y = 2 3x - y = 8

Black_prince [1.1K]

Solving the system of equations we get solution set (38/11,26/11)

Step-by-step explanation:

We need to solve the system of equations:

$4x - 5y = 2\\3x - y = 8$

Let:

$4x - 5y = 2\,\,\,eq(1)\\3x - y = 8\,\,\,eq(2)$

Multiply equation 2 with 5 and subtract both equations to find value of x:

$4x - 5y = 2\\15x - 5y = 40\\-\,\,\,\,+\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,-\\--------\\-11x=-38\\x=\frac{-38}{-11}\\x=\frac{38}{11}$

So, value of x = 38/11

Now, finding y:

Putting value of x in equation 2

$3x-y=8\\3(\frac{38}{11})-y=8\\\frac{114}{11}-y=8\\-y=8-\frac{114}{11}\\-y=\frac{8*11-114}{11}\\-y=\frac{88-114}{11}\\-y=\frac{-26}{11}\\y=\frac{26}{11}$

So, value of y = 26/11

So, Solving the system of equations we get solution set (38/11,26/11)

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

6 0

3 years ago

The height, h, in feet of a piece of cloth tied to a waterwheel in relation to sea level as a function of time, t, in seconds ca

BartSMP [9]

Answer:

20 seconds

Step-by-step explanation:

I assume you mean $h(t)=8\cos(\frac{\pi}{10}t)$ for your function.

As the given function is in the form of $f(t)=a\cos(bt+c)+d$ (some textbooks may write this formula differently), the period is equal to $\frac{2\pi}{|b|}$ . Hence, the period of the given function is $\frac{2\pi}{|\frac{\pi}{10}|}=\frac{2\pi}{1}*\frac{10}{\pi}=\frac{20\pi}{\pi}=20$ , or 20 seconds.

8 0

3 years ago

Which of the following is a perfect square? A. 13 B. 100 C. 102 D. 127

Maru [420]

I believe it is B since 10x 10 is 100 so that would make it a perfect square.

3 0

3 years ago

Read 2 more answers

A triangle has one angle that measures 58° and one angle that measures 32°. What kind of triangle is it

Nikitich [7]

It would be an acute triangle. An acute triangle is when it has 2 or more angles below 90 degrees. Since both angles are below 90, and those are considered ''acute angles'' your answer would therefore be acute triangles.

5 0

4 years ago