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AfilCa [17]
3 years ago
12

Tommy opens an account with $50 and deposits $10 a week. The same week, Shelby opens an account with $25 and adds $10 a week. ho

w many weeks will it take for Tommy and Shelby to have the same amount of money in their accounts?
Does this word problem have no solution?​
Mathematics
1 answer:
asambeis [7]3 years ago
6 0
There is no solution since they are both adding $10 to their accounts every week.
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Please help logarithms!
nlexa [21]

Given:

\log_34\approx 1.262

\log_37\approx 1.771

To find:

The value of \log_3\left(\dfrac{4}{49}\right).

Solution:

We have,

\log_34\approx 1.262

\log_37\approx 1.771

Using properties of log, we get

\log_3\left(\dfrac{4}{49}\right)=\log_34-\log_349      \left[\because \log_a\dfrac{m}{n}=\log_am-\log_an\right]

\log_3\left(\dfrac{4}{49}\right)=\log_34-\log_37^2      

\log_3\left(\dfrac{4}{49}\right)=\log_34-2\log_37          [\log x^n=n\log x]

Substitute \log_34\approx 1.262 and \log_37\approx 1.771.

\log_3\left(\dfrac{4}{49}\right)=1.262-2(1.771)

\log_3\left(\dfrac{4}{49}\right)=1.262-3.542

\log_3\left(\dfrac{4}{49}\right)=-2.28

Therefore, the value of \log_3\left(\dfrac{4}{49}\right) is -2.28.

5 0
3 years ago
The division of whole numbers is commutative. true or false?
AURORKA [14]
'Commutative' means you can work it in the other direction without changing it.
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Andre45 [30]

Answer:

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ipn [44]
In order to find the original price, we need to divide by 4. This is because the price was reduced by 20%, it is 4/5 of the original price. 

By dividing by 4, we can see that 90.40 is 22.60. 

To find the original price, we add 22.60 (1/5 of the original price), to 90.40 (4/5 the original price) to find that $113 is the original price. 
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Step-by-step explanation: got it right in khan

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