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4 years ago

I think of a number, add 3 to it and multiply the result by 7.

Mathematics

1 answer:

Alla [95]4 years ago

6 0

Answer:

$7(x + 3)$

Step-by-step explanation

thinked number = x

add 3 = +3

$x + 3$

multiply the result by 7

 $7( x+ 3)$ 

hope this helps

brainliest appreciated

good luck! have a nice day!

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2y - 8x - 20 In slope

lilavasa [31]

Answer:

y=4x+10

Step-by-step explanation:

2y-8x-20=0

2y-8x=0+20

2y-8x=20

2y=8x+20

y=4x+10

Hope that will help!!

8 0

3 years ago

Find the nth degree polynomial function with real coefficients satisfying the given conditions.

RUDIKE [14]

$\bf (x+1)(x-3)(x-2-4i)(x-2+4i)
\\\\
\textit{now, let's take a peek at }(x-2-4i)(x-2+4i)\\
\textit{and recall our }\textit{difference of squares}
\\ \quad \\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\\\
-----------------------------\\\\
(x-2-4i)(x-2+4i)\implies [(x-2)-(4i)][(x-2)+(4i)]
\\\\\
[(x-2)^2-(4i)^2]\implies [(x^2-2x+4)-(4^2\boxed{i^2})]
\\\\\
[(x^2-2x+4)-(16\cdot \boxed{-1})]\implies [(x^2-2x+4)+16]
\\\\
(x^2-2x+20)\\\\
-----------------------------$

$\bf thus
\\\\

\begin{array}{llll}
(x+1)(x-3)\\(x-2-4i)(x-2+4i)
\end{array}\implies (x+1)(x-3)(x^2-2x+20)
\\\\\\
(x^2-2x-3)(x^2-2x+20)\implies 
\begin{array}{llll}
x^4-2x^3+20x^2-2x^3\\+4x^2-40x+3x^2-6x+60
\end{array}
\\\\\\
x^4-4x^3+27x^2-46x+60$

4 0

3 years ago

Please someone help me !!!!!

Sveta_85 [38]

X² = 16
x = ±√16
x = ±4

The roots of this equation are -4 and 4
Сorrect answer is third from above

6 0

4 years ago

9m + 7n2 - 4 + 6m + 5

Ksivusya [100]

Answer:

15m+7n2+1

Step-by-step explanation:

You can add 9m and 6m. Then you will get 15m. Then you would add -4 and 5, you would get 1. So the new equation would be the answer. Since 7n2 doesn’t have another variable to connect to.

8 0

3 years ago

Homework, pls help ( 10 points )

NeTakaya

4(8x + 3y)

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