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3 years ago

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 . A.×2 + c B. 3X2 + c c . x4 + c 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]

$9^2-2*9+m=0\\
\\
81-18+m=0\\
\\
m=-63$

$x^{2} -2x-63=0\\
\\
\Delta=(-2)^2-4.1.(-63)=4+252=256\\
\\
x=\frac{2 \pm 16}{2}\\
\\
x_1=\frac{18}{2}=9\\
\\
n=x_2=\frac{-14}{2}=-7\\
\\
n-n=-7-(-63)=-7+63=56$

4 0

3 years ago

1. as.at 2. (a/b)2 (a/b) 8 3. (3)-5 4. (x/y)" 5. (2m4n3)5

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

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

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