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3 years ago

What's the answerrrrrrrrrrrrrr

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

5 0

I tnjnk is b I'm not sure

OLEGan [10]3 years ago

3 0

It's a I am 100% sure instead of asking get this app called scan math or photo math in your phone it gives both Answers and solving

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<img src="https://tex.z-dn.net/?f=4%20%20%20%7B%7D%5E%7Bx%20%7D%20%20%2B%206%20%7B%7D%5E%7Bx%7D%20%3D%209%20%7B%7D%5E%7Bx%7D%20%

Nookie1986 [14]

So, the value of x is 1.19

The question is an exponential equation

<h3>What is an exponential equation?</h3>

An exponential equation is a mathematical expression between two quantities in which one variable is raised to a power of the other variable.

Since $4^{x} + 6^{x} = 9^{x}$ ,

Dividing through by 4ˣ, we have

$\frac{4^{x} }{4^{x} } + \frac{6^{x} }{4^{x} } = \frac{9^{x} }{4^{x} } \\1 + (\frac{6}{4})^{x} } = (\frac{9}{4})^{x} } \\1 + (\frac{3}{2})^{x} } = (\frac{3^{2} }{2^{2} })^{x} } \\1 + (\frac{3}{2})^{x} } = (\frac{3}{2})^{2x} }$

Let y = (3/2)ˣ

So,

1 + y = y²

y² - y - 1 = 0

Using the quadratic formula to find y,

$y = \frac{-b +/- \sqrt{b^{2} - 4ac} }{2a}$

where a = 1 b = -1 and c = -1

Substituting the values of the variables into the equation, we have

$y = \frac{-(-1) +/- \sqrt{(-1)^{2} - 4\times 1 \times (-1)} }{2\times 1}\\= \frac{1 +/- \sqrt{1 + 4} }{2}\\= \frac{1 +/- \sqrt{5} }{2}\\= \frac{1 - \sqrt{5} }{2} or \frac{1 + \sqrt{5} }{2}\\= \frac{1 - 2.236}{2} or \frac{1 + 2.236}{2}\\= \frac{- 1.236}{2} or \frac{3.236}{2}\\= -0.618 or 1.618$

Since y = (3/2)ˣ

Takung logarithm of both sides, we have

㏒y = ㏒(3/2)ˣ

㏒y = x㏒(3/2)

x = ㏒y/㏒(3/2)

x = ㏒y/㏒1.5

Since we do not have logarithm of a negative number, we use y = 1.618.

So, x = ㏒y/㏒1.5

x = ㏒1.618/㏒1.5

x = 0.2090/0.1761

x = 1.19

So, the value of x is 1.19

Learn more about exponential equation here:

brainly.com/question/11832081

#SPJ1

5 0

1 year ago

5×67-34÷2+5 equals what

bekas [8.4K]

Answer: $323$

Step-by-step explanation:

1) Add () to the equation: $(5*67)-(34/2)+5$

2) Multiply: $5*67=335$

3) Divide: $34/2=17$

4) Subtract: $335-17=318$

5) Add: $318+5=323$

3 0

3 years ago

Read 2 more answers

Right answer will be marked brainliest

valina [46]

Answer:

the polygon has 18 sides

7 0

3 years ago

Share 126 litres of petrol between Joel and Trump in the ratio 2:5

sergey [27]

Answer:

36:90

Step-by-step explanation:

trust me and make me brainliest please!!

4 0

2 years ago

Read 2 more answers

Directions: Select the correct answer from each drop-down menu.Sandy's orchard has only apple trees and pear trees and she is wa

valentina_108 [34]

First lets get the ratio for the avocado and pear trees and work from there
We know there are 5 pear trees for every 2 avocado trees or 5:2

Since we know the total Avocado trees is 18 we can find out how much to multiply the ratio by dividing the total number of trees(18) by the Avocado portion of the ratio (2) 18/2 = 9.

This means to get the total number of pear trees we need to also multiply the pear side of the ratio (5) by 9. 5*9 = 45 pear trees

Now that we know the pear trees we do the same thing with the apple and pear trees to figure out the total apple trees. The ratio of apple to pear trees is 4:3.

Since we know the total number of pear trees is 45 we divide that by the pear side of the ratio (3) to get our multiplier. 45/3=15.

We then multiply our apple side of the ratio (4) by our multiplier (15) to get our total number of apple trees. 4*15=60

Now we know that we have 60 apple trees and 18 avocado trees or 60:18 which reduced is 10:3 apple trees:avocado trees

3 0

3 years ago