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devlian [24]
3 years ago
14

Which equations are correct

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
3 0

Answer:

2nd, 3rd and 4th equations are correct.

Step-by-step explanation:

-4x^2(2x^2+5)=-8x^4-20x^2\\\\

is right because each term inside is multiplied by -4x square and we find the answer is right.

-4b^3(5b^2+3)\\\\\\= -4(5)(b^3)(b^2) =-20b^6-12b^3\\

Hence correctly done.

-5a^4(2a^2+4)=  (-5)(2)(a^4)(a^2)+(-5)(4)(a^4\\-10a^6-20a^4\\

Correctly done.

-6^4(4y^2+2)=-24y^8-12y^4\\= -(6)(6)(6)(6) 4y^2 -(6)(6)(6)(6) (2)

should be the right answer.

But instead only 6 is multiplied by inner terms. Hence wrong.

I answer is wrong and others are right.

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two consecutive odd number are such that three times the first is 5 more than twice the second. What are those two odd numbers?
Veseljchak [2.6K]
<h2>Answer:</h2>

The first consecutive odd number is: 9

and the second consecutive odd number is: 11

<h2>Step-by-step explanation:</h2>

Let the two consecutive odd numbers be: a and a+2

( Since, we know that the difference between two consecutive odd or two consecutive even numbers is always 2 )

Now, it is given that:

Three times the first is 5 more than twice the second.

i.e.

3a=5+2(a+2)\\\\i.e.\\\\3a=5+2a+4\\\\3a=5+4+2a\\\\3a=2a+9\\\\3a-2a=9\\\\a=9

Hence, we get:

The first consecutive odd number is: 9

and the  second consecutive odd number is: 9+2=11

7 0
3 years ago
Is 0.018 a reasonable answer for 1.8×100
LenKa [72]
No, it would be 180.0 , since you are multiplying the small amount by a large amount that is not negative.
7 0
3 years ago
Read 2 more answers
Jason is filling his circular pool with water. The diameter is 14 feet. If it takes an hour for the water to rise 6 inches, how
lesantik [10]
Well, the diameter doesn't matter in this problem because we allready know how fast, and how much the pool is filling. So, 6 inches is half of a foot, because 1 foot = 12 inches, and six is half of 12. If it take 1 hour for the pool to fill 1/2 of an foot, than it takes 2 hours for a full foot. Next, we multiply 2 hours, by 1 foot, and convert the 1 foot, to 4 feet. Which means to figure out the number of hours, we have to times 2 hours by 4 feet. And that is 8. 
So the answer is: 8 feet.
I hope this helped! Please mark brainliest!
6 0
3 years ago
What is the equation of the line shown in the graph?
Jet001 [13]

Answer:

-1/5

Step-by-step explanation:

I couldn't tell whether or not your question was asking for either the slope intercept form or just the slope.

Your answer would be: y = -1/5x + 3   [if your question is asking for the slope intercept form]

OR

Your answer would be: -1/5   [if your question is asking for just the slope]

7 0
3 years ago
Jonah's book is 9 chapters long. How long will it take him to read the entire book, if he can read one chapter in 16.4 minutes?
Mama L [17]
It would be 147.6 because you multiply 9 time 16.4
7 0
3 years ago
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