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jeka94
3 years ago
6

With explanation plz.. ( -2) + 9 * 10 Order of Operation

Mathematics
2 answers:
irinina [24]3 years ago
6 0
Remember PEMDAS.
Parenthesis
Exponent
Multiplication/Division
Addition/Subtraction
First you see if there is anything that needs to be solved in perentheses. Insidently there is not. The only thing that is in perentheses is an integer and not an equation. Then you see if there is any exponents, yet again there is not. Next you find any Multiplication or Division. These go together and are solved from left to right in this equation there is a multiplication. Finally you solve the additon and subtraction together. There is an instance of this as well. Here is how to work it out.
(-2) + 9 * 10
= (-2) + 90
= 90 - 2
= 88
((-2) + 90 is the same thing as 90 - 2 so you can write it that way if it is easier for you)

Hope this helps!!!
kondor19780726 [428]3 years ago
3 0
Parentheses, Exponent, Multiply, Division, Addition, Subtraction is your order (aka PEMDAS). Multiply 9x10 which gives you 90, then add -2 (or subtract 2) and your answer is 88.
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3 years ago
Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?
MaRussiya [10]

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43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions}  = 80\%

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

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replace

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5 0
3 years ago
Brainliest and Five Stars for correct answers
wel
\bf \lim\limits_{x\to 9}~\cfrac{x^2-81}{x-9}\implies \cfrac{\stackrel{\textit{difference of squares}}{x^2-9^2}}{x-9}\implies \cfrac{\underline{(x-9)}(x+9)}{\underline{(x-9)}}
\\\\\\
\lim\limits_{x\to 9}~x+9\implies (9)+9\implies 18
3 0
3 years ago
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