Use mental math to find the value of 15/124·230/30÷230/124

Answers

Answer 1

Answer:

By using mental math the value of 15/124·230/30÷230/124 is 1/2.

How to get better at mental math ?

To get better at mental math or metal calculation we can start by practising doing arithmetic operations of two digit numbers.Then after we can go on increasing the digits when we're getting better at it.Thinking of the easiest way to chunks numbers also helps.

According to the given question

{(15/124)×(230/30)}/(230/124)

First the fraction (230/124) which is in the denominator we flip and multiply.

= (15/124)×(230/30)×(124/230)

Now 124 and 124 on numeration and denominator gets cancelled and same case is applicable for 230 then after we are left with 15/30 which is equal to 1/2.

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Answer 2

Answer: Okay, the first thing to do is to make it so you're multiplying everything instead of dividing by that last fraction. To divide by a fraction, you just multiply by its reciprocal. So then, it's 15/124 x 230/30 x 124/230. After that, let's organize it into one single giant fraction since order of operations allows us to arrange division and multiplication however we want. Then it's 15x230x124 / 124x30x230. Then, you'll notice that the 230s and 124s can both be canceled out, leaving 15/30. After simplifying, your final answer is 1/2.

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A=1300e^(.043*5)=$1611.82Where do they get the value for e? (2.718281828459)

Please correct me if I’m wrong

Answers

Answer:

1 = No, 2 is correct, 3 = No, 4 is correct.

Step-by-step explanation:

The sum of three consecutive integers is 1,623. How do you write this as an equation?

Answers

consecutive integers are 1 away from each other therefor they are
x,x+1,x+2

they add to1623
so
x+x+1+x+2=1623 is equation
(fyi 540,541,542 are the numbes)

Since we are looking for a sum, we add. Since we know the integers are consecutive, then we know that the second number will be one more than the first number and the third number will be two more than the first number... so we can set up the equation by setting the first number as "x" and then

x + (x + 1) + (x + 2) = 1623

Now we combine like terms

3x + 3 = 1623

Subtract 3 from each side

3x = 1620

Divide each side by 3

x = 1620/3 = 540

So we have the first number as 540, so the next numbers will be 541 (x +1) and 542 (x + 2)

540, 541, and 542

Check the answer by adding them together to see if they add to 1623

What do the following two equations represent?

Answers

Answer:

perpendicular lines

Step-by-step explanation:

Answer:

Perpendicular lines

Step-by-step explanation:

The slopes are negative reciprocals

for the first equation we get

y=2x+5/2

and the second we get

y=-1/2x-1/10

2 and -1/2 are negative reciprocals

Round each number to the nearest tenth. What is the best estimate for the answer to 47.82 74.31?

Answers

i think that you are multiplying them so the answer is 3553.5

and if your adding it would be 122.1

Translate the phrase into a math expression.15 divided by a number, then decreased by 2

A.
(15 ÷ n) + 2

B.
(15 ÷ n) – 2

C.
15 ÷ (n – 2)

D.
15 ÷ (n + 2)

Answers

B. (15/n) – 2

Because you have to divide the 15 and the number first then "decrease" it by 2

a ski shop has a markup rate of 50% find the selling price of skis that cost the store owner $300. tell me how you got the answer

Answers

if nthe shop has a mark up rate of 50% and they cost 300 to buy you multiply 300 by 50% convert 50% to decimal
so you do .5*300=150
then you add 150 to 300 which means that the shop sells the skis for 450 dollars.

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