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3 years ago

How to solve log and exponential equations

Mathematics

2 answers:

IceJOKER [234]3 years ago

4 0

To be honest idk I’m jus tryna get 100%

alexandr402 [8]3 years ago

4 0

Answer:

9/2

Step-by-step explanation:

logs with the same bases (base 2 in this case) can be combined. the subtraction sign means it division so can combine to

logbase2((4x+1)/(3x-4)) = 1

and bc it's log, you can think of it like 2 to the power of 1 is ((4x+1)/(3x-4))

2 =((4x+1)/(3x-4))

aka 6x-8 = 4x +1

ala 2x = 9

x = 9/2

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Ratio for the volumes of two similar pyramids, given that the ratio of their edge lengths is 8:3?

emmasim [6.3K]

All you have to do is divide the left side of the ratio by 5 and the right side of the ratio by 7. The one that comes out even on both sides is the correct one.

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3 years ago

Complete the table with the number of sit-ups you have to do sunday so that the mean number of sit-ups per day is 100

marissa [1.9K]

The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

Let the number of sit-ups you have to do Sunday be x. Then the sum of all sit-ups is

100+65+120+150+90+0+x=525+x.

The number of days is 7.

Thus, the mean is

$\text{mean}=\dfrac{525+x}{7}.$

You know that the mean number of sit-ups per day is 100, equate these two means and solve the equation:

$\dfrac{525+x}{7}=100,\\ \\525+x=700,\\ \\x=700-525,\\ \\x=175.$

Answer: 175 sit-ups

5 0

3 years ago

Seriously someone help me i answered it but i don’t know if it is right so please tell me if it is and how i got the answer or p

alex41 [277]

Answer:

Step-by-step explanation:

To determine a function rule, look at the table. Input the x and y value from one column into the function to see if it is correct.

<h3>Function a: y = 10 - 2x</h3>

Input values

22 = 10 - 2(6)

22 = 10 - 12

22 ≠ -2 ❌

As we can see, function a gives us a false statement, so a is incorrect.

<h3>Function b: y = 2 - 10x</h3>

Input values

22 = 2 - 10(6)

22 = 2 - 60

22 ≠ -58 ❌

We once again get a false answer, so b is also not correct.

<h3>Function c: y = 10 + 2x</h3>

Input values

22 = 10 + 2(6)

22 = 22 ✔

Finally, we get a true statement, so option c is correct.

<h3>Function d: y = 2 + 10x</h3>

Just to check that option c is correct, we need to prove that d is incorrect.

Input values

22 = 2 + 60

22 ≠ 62 ❌

This is also wrong, so that proves that c is correct.

I'm always happy to help :)

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3 years ago

HEEEEEELP PLLLEEEEEEEZZZZZZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

stellarik [79]

C is correct,

A is wrong as it halves both the angles and lengths by two which is the same as what she did in the first place so it cannot be correct.

B is also wrong for a similar reason, a triangle cannot have less than 180 degrees, which is impossible as the angles just change naturally which is why all triangles must have 180 degrees, which is the reason she is wrong in the first place.

And D is just incorrect, if she wanted to have shorter sides she should have only decreased all the lengths as it the the ratio of angles that determine the shape of a triangle while the sum of all angles is 180 degrees.

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3 years ago

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The moon is about 240000 miles from earth.What is the distance written as a whole number multiplied by a power of ten

Sauron [17]

A whole number? ok. 24x10^4. usually though you would use standard form so it would be 2.4x10^5

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3 years ago

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