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DENIUS [597]
3 years ago
15

Simplify the following expression(5x + x + 2)​

Mathematics
2 answers:
aksik [14]3 years ago
5 0
6x+2......................
Alina [70]3 years ago
4 0

Answer:

6x+2

Step-by-step explanation:

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Kate sold a sailboat at a loss of 20%. If the selling price was $64, what was the original cost?
lapo4ka [179]

So she lost 20% of the original selling price.

$64 is 80% of the original price.

64/80=0.8

0.8·100=80 dollars. HOPE THIS HELPS!!!

8 0
3 years ago
Read 2 more answers
Calculate X3 dx .<br><br>A.×2 + c<br>B. 3X2 + c<br>c . x4 + c<br>D . x4/4+c
olga nikolaevna [1]
\LARGE \int x^3 dx = \frac{x^4}{4}+C

So the answer is choice D. You can check this by differentiating the right hand side and you'll get x^3 back again. 

This answer can be found by using the power rule for integrals. That rule is

\LARGE \int x^n dx = \frac{x^{n+1}}{n+1} + C
4 0
4 years ago
Which are rational and irrational? Thanks in advance :)
DochEvi [55]

Answer:

3\frac{1}{2}-rational

\pi -irrational

-\frac{2}{3}-rational

\sqrt{16} -rational

\sqrt{3} -irrational

18-rational

0.625-rational

0.987987987...-rational

Step-by-step explanation:

Rational numbers:

-are all numbers you can write as a quotient of integers  \frac{a}{b} , b\neq 0

-include terminating decimals. For example, \frac{1}{8}=0.125

-include repeating decimals. For example, \frac{1}{3} =0.33333....

Irrational numbers:

-have decimal representations that neither terminate nor repeat. For example, \sqrt{2}=1.414213....

-cannot be written as quotients of integers

8 0
3 years ago
One root of the quadratic equation x^2 − 2x + m = 0 is 9. If the other root is n, what is n−m?
mote1985 [20]
9^2-2*9+m=0\\&#10;\\&#10;81-18+m=0\\&#10;\\&#10;m=-63

x^{2} -2x-63=0\\&#10;\\&#10;\Delta=(-2)^2-4.1.(-63)=4+252=256\\&#10;\\&#10;x=\frac{2 \pm 16}{2}\\&#10;\\&#10;x_1=\frac{18}{2}=9\\&#10;\\&#10;n=x_2=\frac{-14}{2}=-7\\&#10;\\&#10;n-n=-7-(-63)=-7+63=56
4 0
3 years ago
1. as.at<br>2. (a/b)2 (a/b)<br>8<br>3. (3)-5<br>4. (x/y)"<br>5. (2m4n3)5<br>​
Nikolay [14]
1- I didn't understand it

2).. (a/b)² (a/b)⁸

= (a/b)²+⁸ = (a/b)¹⁰

3) 3-⁵ = 1/3⁵ = 1/243

4) (x/y)"

d/dx (x/y) = (1/y)
d/dx (1/y) = 0

5) (2m⁴n³)⁵

= 2⁵ × (m⁴)⁵ × (n³)⁵

= 32 × m²⁰ × n¹⁵

= 32m²⁰n¹⁵
5 0
2 years ago
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