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Anettt [7]
3 years ago
13

I need help with finding the sum of (x^4 + 2x^3 - 7x - 9) + (x^5 - 2x^4 + 8x + 18) in standerd form

Mathematics
1 answer:
Lilit [14]3 years ago
3 0

Answer:

Step-by-step explanation:

(x^4 + 2x^3 - 7x - 9) +

(x^5 - 2x^4 + 8x + 18)

x^5 - x^4 + 2x^3 + x + 9

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I have a few questions!
Sedaia [141]

Answer:

okay first one is ,3

Step-by-step explanation:

3 0
3 years ago
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Pleas help me quickly !
Maksim231197 [3]

Answer:

-36

Step-by-step explanation:

-(36/-6) to the power of 2 is -36.

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3 years ago
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Please help me with this question!
gavmur [86]
First off, let's convert the percentages to decimal format, so our 77% turns to 77/100 or 0.77, and our 55% turns to 55/100 or 0.55 and so on

now, the sum of both salines, must add up to the 77% mixture, let's say is "y"
so, 11 + 4 = y, and whatever the concentration level is, must also sum up to the mixture's concentration of 77%

anyway   thus

\bf \begin{array}{lccclll}
&amount&concentration&
\begin{array}{llll}
concentrated\\
amount
\end{array}\\
&-----&-------&-------\\
\textit{first sol'n}&11&x&11x\\
\textit{second sol'n}&4&0.55&2.20\\
------&-----&-------&-------\\
mixture&y&0.77&0.77y
\end{array}\\\\
-------------------------------\\\\
\begin{cases}
11+4=y\implies 15=\boxed{y}\\
11x+2.2=0.77y\\
----------\\
11x+2.2=0.77\cdot \boxed{15}
\end{cases}

solve for "x"
6 0
4 years ago
What is the product of (7 x 10^-5) x (5 x 10^-8) <br> (7 x 10^-5) x (5 x 10^-8) = ? x 10^?
arsen [322]

Answer:

3.5\times10^-^1^2

Step-by-step explanation:

(7 \times 10^-5) \times (5 \times 10^-8)

Evaluate

(7 \times 5)\times(10^-^5\times10^-^8)

35\times10^-^5^-^8

35\times10^-^1^3

35\times10^1\times10^-^1^3

3.5\times10^1^-^1^3

3.5\times10^-^1^2

Thus, the answer is 3.5\times10^-^1^2

<em>~Lenvy~</em>

7 0
2 years ago
What is the answer to the length of a rectangle is 5 feet more then the width and the perimeter is 22 what is is width of the re
Margaret [11]
Question:
l = 5 + w
perimeter = 22
width?

Solution:
Perimeter = 22
2(l + w)     = 22
2(5+w+w) = 22
2 (5 + 2w) = 22
     5 + 2w = 11
           2w = 6
             w = 3

The width is 3
3 0
3 years ago
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