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3 years ago

How do you use the order of operations to simplify expression with exponent

2 answers:

7 0

So the trick I was taught to use was PEMDAS which stands for Parenthesis, Exponents, Multiplication, Division, Addition, and Subtraction. You solve the parenthesis first, followed by exponents if there are any. Multiplication and division are equal. So if there's multiplication and division in the problem, you solve the one closest to the left or start of the equation first. The same rules apply for addition and subtraction. They are both equal so you solve the first one first, even if the subtraction is before the addition.

forsale [732]3 years ago

3 0

The order of operations is to solve what ever is in brackets (or Parentheses) and then exponents then division or multiplication from left to right then addition and subtraction from left to right an, easy way to remember all that is to remember the word BEDMAS

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250% of what number is 90

katrin2010 [14]

The equation out of this is; what is 250/100 of a number x = 90?
=> Division of 250 by 100 gives 2.5.
=> Now multiply 2.5 by a number x resulting to 2.5x on the L.H.S.
=> make x the subject and come up with x = 90/2.5.
answer is 1/36.

4 0

3 years ago

Help for all, will mark brainliest!!!!! :)

Nat2105 [25]

Answer:

Number 4: Using Pythagoras Theorem,

$\sqrt{30^2+40^2} =50$

Number 5:

$\sqrt{41^2-40^2}=9$

$\sqrt{11^2+60^2} =61$ It is a right triangle

$\sqrt{9^2+37^2} =38.09$ Not a right triangle

For the last one:

$\sqrt{(\sqrt{20^2+6^2})^2+6^2} =2\sqrt{118}$

Rounded down (because the answer needs to be a whole number) is 21

7 0

3 years ago

Toni can carry up to 18 lb in her backpack. Her lunch weighs 1 lb, her gym clothes weigh 2 lb, and her books (b) weigh 3 lb each

Sergeu [11.5K]

Toni can carry up to 5 books

1+2+3b=18
combine 1 and 2
3+3b=18
subtract 3 from both sides
3b=15
divide 3 from both sides
b=5

6 0

3 years ago

Read 2 more answers

PLEASE ANSWER THIS ASAP, I WILL BE GIVING YOU A THANKS!

densk [106]

Answer:

I would say D. There is no logical explanation for the final answer but there is for everything else.

For A: Makes sense because 3x-2 are in parenthesis outside a number so you can multiply.

For B: Makes sense because you are allowed to add/subtract like terms but in this case only subtracting would make sense, (which is what they did) since you want to get all the like terms on one side.

For C: Makes sense because you are trying to simplify the equation, and they are both like terms (they are both numbers that have no letter attached to them) and they are on the opposite side making them able to be simplified.

For D: No idea what the point is.

7 0

2 years ago

The ratio of blue jays to Robin's was 6 to 7. If there were 84 Robins, how many blue jays were there?

Paul [167]

Answer:

Step-by-step explanation:

Since the ratio of blue jays to robin's was 6 to 7 then if there were 84 robins how many blue jays were there.

6 to 7 can also be express as 6/7

Thus, we can set up a proportion

6/7 = x/84

Now, we have to solve for x

x = 72

Hence, if there were 84 robin there would be 72 blue jays.

~lenvy~

3 0

2 years ago