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2 years ago

Giving branlist if you get it correct!!!

Mathematics

1 answer:

FinnZ [79.3K]2 years ago

3 0

Answer:

x - 10 = 28

Step-by-step explanation:

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Evaluate x^2+5 when x equals 3

earnstyle [38]

Answer:

Step-by-step explanation:

7 0

2 years ago

PLEASE HELP ME WITH THIS PROBLEM! PLEASE

Vladimir [108]

Answer:

when I find out the two others ill edit this,sorry i'm kinda slow lol

Step-by-step explanation:

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4 0

2 years ago

) The density of oil in a circular oil slick on the surface of the ocean at a distance of r meters from the center of the slick

Feliz [49]

Answer:

Therefore the mass of the of the oil is 409.59 kg.

Step-by-step explanation:

Let us consider a circular disk. The inner radius of the disk be r and the outer diameter of the disk be (r+Δr).

The area of the disk

=The area of the outer circle - The area of the inner circle

= $\pi (r+\triangle r)^2- \pi r^2$

$=\pi [r^2+2r\triangle r+(\triangle r)^2-r^2]$

$=\pi [2r\triangle r+(\triangle r)^2]$

Since (Δr)² is very small, So it is ignorable.

∴ $A=2\pi r\triangle r$

The density $\delta (r)= \frac{40}{1+r^2}$

We know,

Mass= Area× density

$=(2r \pi \triangle r)(\frac{40}{1+r^2}})$

Total mass $M=\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i$

Therefore

$\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i=\int_0^5 \frac{80r\pi }{1+r^2}dr$

$=40\pi[ln(1+r^2)]_0^5$

$=40\pi [ln(1+5^2)-ln(1+0^2)]$

$=40\pi ln(26)$

= 409.59 kg (approx)

Therefore the mass of the of the oil is 409.59 kg.

3 0

2 years ago

Which of the following ordered pairs is a solution of the function f(x)=3x-1

Lemur [1.5K]

The answer is (-1,-4)

7 0

3 years ago

Use the distributive property to write an equivalent expression for each expression below.

IRINA_888 [86]

A.36x-27y-6

B.12x-6y+2

3 0

3 years ago