Simplify (3r^2+4) (2r-1).-8r^3+6r^2

Answers

Answer 1

Answer: first simpliify
(3r^2+4)(2r-1)=
(3r^2+4)(2r)+(3r^2+4)(-1)=
(6r^3+8r)+(-3r^2-4)=
6r^3+8r-3r^2-4=
put back

6r^3-3r^2+8r-4-8r^3+6r^2=
-2r^3+3r^2+8r-4

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How to convert 0.39 into a fraction?

Solve for n: -6(n -8) = 4(12 -5n) + 14n.

Answers

Answer:

infinite solutions

Step-by-step explanation:

Given

- 6(n - 8) = 4(12 - 5n) + 14n ← distribute parenthesis on both sides

- 6n + 48 = 48 - 20n + 14n, that is

- 6n + 48 = 48 - 6n ( add 6n to both sides )

48 = 48 ← True

This indicates that the equation is true for any value of n

Answer:

This is a very classical type of equation in which, the solution is basically any number and it is known as an "Identity". So it has infinite solutions

Step-by-step explanation:

Apply the distributive law to both sides of the equation:

-6(n-8) = 4(12-5n)+14n

-6n-6*(-8) = 4*12+4*(-5n) + 14n

Reduce similar terms

-6n+48=48-20n+14n

-6n+48=48-6n

From here it is clear them to see that by adding -48 and 6n to both sides one obtains the identity 0 = 0

-6n+48=48-6n

-6n +6n + 48 -48 = 48 -48 - 6n + 6n

0 = 0

So every time you find this kind of problem and after reducen the equation you end up with a true statement, then the equation has infinite solutions

Can someone please help me

Answers

it is the first one because fist you reflect it to the right across the y axis, then you reflect it down across the x axis, and last but not least, you reflect it left across the y axis where it is now

hope this is helpful! :)

Combine like terms 7a+4b-3a-2b

Answers

Combining like terms:

- Could combine numbers that have the same variable
- Numbers with no variable.

7a - 3a = 4a
4b - 2b = 2b

4a + 2b is the final answer

Like terms...

Well step 1 is to know what a term is. A term, in regards to math, is basically the things between any operation sign (+, -, *, /). Every time you see one of those signs in a problem, you're beginning a new term.
Step 2 is to locate the different terms in this problem. Remember, everything you see up until an operation sign is part of the term. Your term list, for this problem, is:

7a
4b
-3a
-2b

Got it? Cool. Now, we can find the like terms. a like term is a term whose variable and exponents are the same as another like term. Since none of these have exponents, do you see any terms that have matching variables ( which is the letter following the coefficient, which is the number)? Yep! In fact, there are two sets!

First set of like terms: 7a and -3a
Second set of like terms: 4b and -2b

Now that we have our like terms, we have to combine them! Ignore the variable for now... In the first set of like terms, what is 7-3? 4! For the second set, what is 4-2? 2! Since the first set goes with the variable "a", and the second set goes with the variable "b", you should get, as your final answer, 4a + 2b.

How many 45 angle it take to make a full turn

Answers

We all know that a full revolution is 360
So do 360/45=8

Or 8*45=360

To sum up the last answer is 8 times

Two becuase 45+45=90. Since 90 degrees is a turn, you can think of 45 degrees as a half a turn.

a 25,000 GALLON swimming pool is being filled. 250 gallons are in it after 30 minutes how many hours will it take to fill the pool

Answers

It would take an hour and 40 minutes because you times 250 by 100

Claire walked 2 2/5 miles. Jason walked 2/3 as far as Claire. How many miles did Jason walk?

Answers

Answer:

Step-by-step explanation:

1486

Answer:

Step-by-step explanation:

1486

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