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3 years ago

If you spend $20 each week and give your brother $5 each week, how much would you have then

Mathematics

1 answer:

denpristay [2]3 years ago

3 0

Answer:

$25

Step-by-step explanation:

actually you would be spending $25 every week

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Write the log equation as an exponential equation. You do not need to solve for x. \log_9\left(2\right)=2x-1 log 9 (2)=2x−1

monitta

Answer:

$9^{2x-1} = 2\\$

Step-by-step explanation:

According to the law of logarithm;

$If \ log_ab = x\\a^x = b$

Given

$\log_9\left(2\right)=2x-1$

Comparing with the original expression;

a = 9, b = 2 and c = 2x - 1

Substitute into the result indicinal expression;

$9^{2x-1} = 2\\$

This gives the required exponential equation

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3 years ago

I am an odd number between 10 and 20. I can be divided by 3. What number am I?

finlep [7]

Answer:

Step-by-step explanation:

15÷3=5

15 is between 10 and 20

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3 years ago

Read 2 more answers

Anyone good at math? Geometry in particular???

Gennadij [26K]

Am not good at that much but let me try

6 0

3 years ago

Every _____ tessellates.<br> A. Decagon<br> B. Polygon<br> C. Triangle<br> D. Hexagon

olga2289 [7]

The answer is letter B. Every polygon tesselates. Since the word 'tesselate' here means a pattern of shapes put together without any gaps, then I think every polygon tesselates if they are put side by side together in varying amounts and leave absolutely no gaps or spaces between each other.

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4 years ago

Find the geometric sum: 40 + 20 + 10 + … + 0.078125

sveticcg [70]

$S=40+20+10+\cdots+0.078125$
$S=40\left(1+\dfrac12+\dfrac14+\cdots+\dfrac1{512}\right)$
$S=40\left(1+2^{-1}+2^{-2}+\cdots+2^{-9}\right)$

$2^{-1}S=40\left(2^{-1}+2^{-2}+2^{-3}+\cdots+2^{-10}\right)$

$\implies S-2^{-1}S=40\left(1-2^{-10}\right)$
$\implies\dfrac12S=40\left(1-\dfrac1{1024}\right)$
$\implies S=80\left(1-\dfrac1{1024}\right)=\dfrac{5115}{64}=79.921875$

4 0

3 years ago