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Alexandra [31]
3 years ago
11

Steph earns $50 a week from babysitting she spends $25 saves $15 and uses the rest to repay a loan of $100 from her brother. Aft

er six weeks how much has steph spent, how much has she saved and how much does she still owe her brother
Mathematics
1 answer:
romanna [79]3 years ago
5 0
She saved 90 dollars and she owes her brother 40 still
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Why is using a compass and straightedge and compass better than technology
Dimas [21]

Technology comes from the Greek root \tau \epsilon \chi, meaning art or craft.


For the Greeks, a straightedge and compass was technology.


The nice thing about a straightedge and compass construction of any length is that there's always a corresponding algebraic form consisting of natural numbers combined via addition, subtraction, multiplication, division and square rooting (of positive numbers). So we get an "exact" answer, at least using radicals.


Compare that to the typical calculating technology we use today where the square roots turn into approximations. The calculator is worse, turning an exact answer into an approximation.


Straightedge and compass constructions play a large role in the development of mathematics but they're not really better, it's just how things went. By restricting ourselves to straightedges (linear equations) and compasses (circles, quadratic equations) we restricted the possible lengths we could construct. Understanding exactly how propelled mathematics forward for a couple of thousand years.




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4 years ago
The sum of two numbers is 42. one number is 2 times as large as the other. what are the numbers?
ELEN [110]
The numbers are 14 and 28
5 0
3 years ago
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In the first week of July a record 1120 people went to the local swimming pool in the second week 105 fewer people went to the p
Westkost [7]

Answer:

25%

Step-by-step explanation:

The number of people who went to the local swimming pool in the;

first week = 1120

second week ( 105 fewer people) = 1120 - 105 = 1015

third week (135 more people) = 1015 + 135 = 1150

fourth week (310 fewer people|) = 1150 - 310 = 840

The percent decrease in the number of people who went to the pool over these four weeks

= (1120 - 840)/1120 * 100%

= 280/1120 * 100%

= 1/4 * 100%

= 25%

It means that the number of people who went to the local swimming pool over the 4 weeks decreased by 25%

5 0
3 years ago
At the market,8 apples cost $4.How much do 9 apples cost?
svet-max [94.6K]
Divide the price by amount to find out how much each costs. multiply that by 9. 4 (divided by) 8 = .5, or 50cents.  each apple is 50cents. multiply .50 by 9. It costs 4.50. Hope this helps
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4 years ago
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First one is 12^2
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