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Pre-Algebra

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Question:

Change 1 2/3 into an improper fraction and into a percentage. If needed round to the tenths place.

India E.

Answer:

1. First, what is our number given in? Yep, a mixed number! So the first step in making a mixed number into an improper fraction is multiplying the denominator (the number at the bottom of the fraction) by the whole number (the number that is not associated with the fraction) (3)(1) = 3 2. Next, we have to add the numerator (the number on top of the fraction) to the answer we just got from multiplying the denominator and the whole number 3 + 2 =5 3. Then we have to but that answer on top of the already existing denominator 5/3 (Hint: the improper fraction should equal the mixed number, just written in a different form) 4. Now for the percentage, what do you think we should do? Yeah divide the denominator by the numerator ( this would be long division) to get a decimal 5. 3 goes into 5 1 time, and that would leave a 2 remainder 6. Since we have no more numbers behind the 3 we add a decimal point and add a 0. Then the 0 is dragged down to make the 2 a 20. 7. 5 goes into 20 4 times so now we know that 5/3 = 1.4 as a decimal 8. The last step to make the decimal into a percentage is to multiply it by 100 (Hint: multiplying anything by 100 either adds 2 zeros or moves the decimal place to the right twice) (1.4) (100) = 140% 9. Your two answers are 5/3 for the improper fractions and 140% for the percentage, makes sure to box your answers so they will be easy to find when you review!

Biology

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Question:

What are the two types of digestion that happen in the human digestive tract? Name them and give a basic description of what each one is, and what it does.

India E.

Answer:

The two types of digestion are chemical and mechanical. If we think about how we eat and digest food, the first thing that comes to mind in eating right. Chewing up our food is a form of mechanical digestion. This is described as physically breaking down your food into smaller pieces, so the act of chewing your food. However medicinal digestion is not the only thing that happens as you chew your food, there is also chemical digestions. Remember that thing you do when you see your favorite food in the world... yeah, drool, or in scientific terms salivate. Saliva breaks down food too, chemically, by breaking it down into simple nutrients. Chemical digestion also happens in your stomach with gastric acid, which is a super strong acid. The gastric acid in your stomach is better at breaking down food into nutrients then your saliva in your mouth, but no the less both are forms of chemical digestion.

Algebra

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Question:

Write the simplified answer to the equation x = -5, y = 2 (2x+7) + 9 - (-7) + (9y -6)

India E.

Answer:

1. The first thing to look at is the order of operations PEMDAS Parenthesis, exponents, multiplication, division, addition, and subtraction 2. When we follow the order of operations we see that parenthesis is the first thing to do in the equation. However we see that each parenthesis has an exponent, so we have to plug in the numbers given for our variables x and y. 3. Once our variables numerical values are plugged in, we solve for our answers in the parenthesis (2 (-5) +7) +9 - (-7) + (9 (2) -6) (-10+7) + 9 - (-7) + (18-6) -3 +9 -(-7) +12 4. Now just work the equation from left to right, because, when we look at the order of operations it has addition in front of subtraction however when those are the only operations we have they are interchangeable as long as they are done in order from left to right. -3 +9 -(-7) +12 6 -(-7) +12 (stop to see the subtraction sign in front of the -7, when a subtraction sign and a negative are beside each other the "combine" to make a positive + sign instead, so it would be like adding 7 or subtracting negative 7, the negatives cancel out to make it a positive) 6 + 7 + 12 13+12 = 15 5. 15 is your final answer, and be sure to box it so it will be easier to find and review later on

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