MATHEMATICS MIDDLE SCHOOL

Explain how to subtract 247 from 538

Answers

Answer 1

Answer:

Answer:

291

Step-by-step explanation:

subtract 247 from 538

In general, subtract a from b is written as b-a. 'a' is get subtracted from b

subtract 247 from 538

we need to subtract 247 from the number 538

So it can be written as

$538-247=291$

When we subtract 247 from 538 we got 291

subtract 247 from 538 gives us 291

Answer 2

Answer: You just subtract as normal:

247 - 538 =

But since 247 is smaller than 538, your answer will be negative

247 - 538 = -291

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40% of what number is 5

Answers

40% can be expressed as 40/100 or 0.4

$(40)/(100) * x = 5\n\n0.4 * x = 5$

Divide both sides by 0.4 to isolate 'x'

$0.4x = 5\n\n(0.4x)/(0.4) = (5)/(0.4)\n\nx = (5)/(0.4) \n\n\boxed{\bf{x = 12.5}}$

40% of 12.5 is 5.

It would be 12 and 1/2 because 40% is 2 and 1/2 of 100 and then you do 5 times 2 and 1/2 and you get 12 and 1/2.

F(x)=(3x-1)/(2) find f^(-1)(2)

Answers

Answer:

$f^(-1) (2)=(5)/(3)$

Step-by-step explanation:

To find the inverse of a function, we must replace y for x and then solve for y.

$y=(3x-1)/(2) \nx=(3y-1)/(2) \n2x=3y-1\n3y=2x+1\ny=(2x+1)/(3) \nf^(-1) (x)=(2x+1)/(3)$

Now we can substitute x=2 into our inverse function

$f^(-1) (2)=(2(2)+1)/(3) \nf^(-1) (2)=(5)/(3)$

An angle measures 42° less than the measure of a complementary angle. What is the measure of each angle?

Answers

Complimentary angles add to 90 degrees. So if you have an angle, x, and another angle, x - 42, they should add together to equal 90...

x + x-42 = 90
2x - 42 = 90
2x = 132
x = 66 degrees (1st angle)

66 - 42 = 24 degrees (2nd angle)

*Check 66 + 24 = 90 :)

Complementary angles will add up to 90 degrees.
Let X = one of the angles
Let X - 42 = the other angle
X + X - 42 = 90
2X - 42 = 90
2X = 132
X = 66
X - 42 = 24
Check 66 + 24 = 90

A package holds 30 batteries.How many batteries are in 14 packages

Answers

Answer:

420

Step-by-step explanation:

just multiply 30 by 14 thats your answer your welcome

Answer:420

Step-by-step explanation:

There are 420 batteries in 14 packages.

Explanation:

A formula for this problem can be:

Where

is the total number of batteries,

is the number of packages and

is the number of batteries in each package.

For this problem we are give

as 14 packages and

as 30 batteries per package. We can substitute these into the formula to calculate the total number of batteries.

420

Which expression represents the product of unknown number and 19?

Answers

it would be 19x because it is the same as 19 times x.

19x, x being the unknown number. or, 19 multipled by x, which would look like 19×(x)

Determine how the next term in each sequence can be found. Then find the next two terms in the sequence 2 1/4. 2 3/4. 3 1/4. 3 3/4

Answers

the next term in each sequence can be found by adding 2/4

the next to terms in the sequence are 4 1/4 and 4 3/4

In the beginning
they put 2 with 1/4 and 3/4
then they put 3 with 1/4 and 3/4
SO I WILL PUT 4 WITH 1/4 AND 3/4

So that is the answer
4 1/4 4 3/4

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