Answer:
Only 10 base units to learn
Step-by-step explanation:
The metric system is a decimal based system developed to be universally acceptable by making use of base units from obtained from nature and the use of prefixes for multiples and submultiples of the base units, decimal ratios, which allows easy representation of quantities, as well as having a coherent structure of base and derived units which are obtained from the base units
During conversion in the metric system, which is decimal based, it is only required to move the decimal point
The prefixes which are used to specify multiples and submultiples are the same through out
The decimal system is based on the powers of ten
The number of base units to learn are 7 including; 1. Meter (m), 2. Kilogram (kg), 3. Second (s), 4. Ampere (A), 5. Kelvin (k), 6. Candela (cd), and 7. mole (mol)
Therefore the metric system has several advantages that include all of the following except; Only 10 base units to learn
The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
<u>Step-by-step explanation:</u>
Here we have , Twenty-eight athletes participate in a 100-meter race. The time of each athlete is measured during the qualification round. The average time is 11 seconds. The 8 athletes with the fastest time qualified for the final. The average time of these 8 athletes is 10.5 seconds. Let's have equations for this:
where
are athletes
⇒ 
⇒ 
⇒ 
⇒
, where m is average time of the 20 athletes who did not qualify for the final.
⇒
⇒ 
⇒ 
∴ The average time of the 20 athletes who did not qualify for the final is 11.2 seconds .
There are 7.5 ounces in each serving
<em><u>Solution:</u></em>
Given that, Sara making punch for her party her punch bowl holds 600 ounces for 80 servings of punch
<em><u>To find: Ounces of punch in each serving</u></em>
From given,
Number of servings = 80
Ounces in bowl = 600 ounces
Then, Ounces of punch in each serving is found by dividing the ounces in bowl by number of servings
<em><u>The formula used is:</u></em>

<em><u>Substituting the values we get,</u></em>

Thus there are 7.5 ounces in each serving


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<h3>x²-4=x+2</h3>
<h3>=>x²-x-4-2=0</h3>
<h3>=>x²-x-6=0</h3>
<h3>=>x²-3x+2x-6=0</h3>
<h3>=>x(x-3)+2(x-3)=0</h3>
<h3>=>(x-3)(x+2)=0</h3>
<h3>=>x=3 and x= -2</h3>
<h2>iz the correct answer!</h2>
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