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Harman [31]
3 years ago
5

How would you do this, I really struggled with this last year.

Mathematics
1 answer:
Deffense [45]3 years ago
5 0
If you're multiplying a whole number by a fraction, then multiply the whole number by the numerator, then divide that number by the denominator. 

So in the case of 15 x (5/6), multiply the 15 by 5 (75) and then divide by 6 to get 75/6 (as an unsimplified answer).

In the case of 3 x (3/6), you again multiply the whole number by the numerator (3x3=9) and divide by the denominator (9/6) to get 9/6 or 3/2 when simplified.
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What is the value of (2x^2-5x+4)if x =7
Troyanec [42]
<span>We have to use PEMDAS for this expression.

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction

</span>(2x^2 - 5x + 4)                    Original Mathematical Expression

[2(7)^2 - 5(7) + 4]                 Plugging the value of x, 7 into expression.

There are parentheses, so that means we have to work in them.

There are exponents, so we have to do those first.

[2(49) - 5(7) +4]                    Exponents.

There is multiplication, that we can do, so we do that left to right.

[98 - 35 + 4]                         Multiplication.

There is no division.

There is addition and subtraction, so we do those left to right.

[63 + 4]                                Subtraction.

67                                        Addition.

Final Answer: 67

6 0
3 years ago
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Elodia [21]

Answer:

It would be the 2nd one

Step-by-step explanation:

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Afina-wow [57]
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<h2>Answer:</h2>

1. - 2°C + 4°C

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Sidana [21]
I hope this helps you

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