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3 years ago

What does it mean use doubles to find the sum 7+8.

Mathematics

2 answers:

fredd [130]3 years ago

7 0

Find what 7 + 7 = 14. Then plus 1 gives you 15 Hope it is right

Zina [86]3 years ago

5 0

Find a number times 2 and put in the numeric sentence. Sorry if it's wrong!

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What is product of 3x-4 an 5x^2-2x+6 <br> help me please, please, please

Fofino [41]

(3x-4)(5x^2-2x+6)
15x^3-6x^2+18x-20x^2+8x-24
15x^3-26x^2+26x-24

4 0

3 years ago

What are the real zeros of x^3+4x^2-9x-36

Katyanochek1 [597]

Answer:

$x = -4\\x = -3\\x = 3$

Step-by-step explanation:

To find the real zeros you must match the function to zero and factor the expression.

We have a polynomial of degree 3.

We try to group the terms to perform the factorization

$x ^ 3 + 4x ^ 2-9x-36 = 0\\\\x ^ 2(x + 4) - 9(x + 4) = 0$

Now we take (x + 4) as a common factor

$(x + 4)(x ^ 2 -9) = 0$

If we have an expression of the form $(a ^ 2-b ^ 2)$ we know that this expression is equivalent to:

$(a ^ 2-b ^ 2) = (a + b)(a-b)$

In this case

$a = x\\b = 3$

So:

$(x ^ 2 -9) = (x + 3)(x-3)$

Finally:

$x ^ 3 + 4x ^ 2-9x-36 = (x + 4)(x + 3)(x-3) = 0$

The solutions are:

$x = -4\\x = -3\\x = 3$

6 0

3 years ago

Help me please! I put this under math because science questions rarely get answered! I'll give brainliest and everything! Just p

BabaBlast [244]

Answer:

1. Right 1N and down 3N

2. (3,5)

3. Go Right 6N

4. North

5. West

6. Northwest

8 0

3 years ago

How many grandparents have my grandparents?

uysha [10]

This doesn't have enough information. it spend on ages, how many children per generation, if direct bloodlines only or adoption count, half relatives, etc.

4 0

3 years ago

Read 2 more answers

Paulo's economics course requires two papers ? ?one long and one short ? ?throughout the semester. The number of pages, l l, in

mixer [17]

Answer:

27 pages.

Step-by-step explanation:

Let l be the number of pages in the long paper and s be the number of pages in the short paper.

We have been given that the total number of pages for both papers is 40. We can represent this information in an equation as:

$l+s=40...(1)$

We are also told that the number of pages in the long paper is one more than two times the number of pages in the short paper. We can represent this information in an equation as:

$l=2s+1...(2)$