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3 years ago

17 - 6 x 10 / 2 + 12

Mathematics

2 answers:

aleksklad [387]3 years ago

8 0

Answer:

-1

Step-by-step explanation:

we use the order of operations refereed to as PEMDAS

pemdas stands for(parentheses, exponents,multiplication,division,addition,subtraction)

we start by solving the underlined

we then solve the underlined again

we continue with the oder of opeations as listed earlier above

<h3>17 - <u>30 + 12................-30 + 12= -18</u></h3><h3><u>we finish by subtraction</u></h3><h3><u>17 - 18 = -1</u></h3><h3><u /></h3>

Burka [1]3 years ago

7 0

Answer:

The answer is -1

Step-by-step explanation:

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3 years ago

What's the answer to this? and please explain.

vichka [17]

<h3>Answer: No, there isn't enough ribbon</h3>

===========================================================

Use this formula

a & b/c = (a*c+b)/c

to convert from a mixed number to an improper fraction

So,

a & b/c = (a*c+b)/c

3 & 3/4 = (3*4+3)/4

3 & 3/4 = 15/4

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Next, we add the fractions 15/4 and 5/6. The denominators aren't the same, so we can't add right away. We need to get the denominators to the LCD.

In this case, the LCD is 4*6 = 24

The fraction 15/4 becomes 90/24 after multiplying top and bottom by 6.
The fraction 5/6 becomes 20/24 after multiplying top and bottom by 4

Now we can add the fractions:

90/24+20/24 = (90+20)/24 = 110/24

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So far, we've added the 3&3/4 portion to the 5/6 portion to get the result 110/24

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Add this to the result of the last section

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Using a calculator, you should find that 126/24 = 5.25

The result is larger than 5, which means she used too much ribbon. There won't be enough ribbon to do everything she wants to do.

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The shortcut we can take is to type the following into the calculator

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