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3 years ago

What is the value of fraction 1 over 3x3 + 5.4y, when x = 3 and y = 2?

1 answer:

4 0

$\dfrac{1}{3}x^2+5.2y\\\\for\ x=3\ and\ y=2\\\\\dfrac{1}{3}\cdot3^2+5.2\cdot2=\dfrac{1}{3}\cdot9+10.4=\dfrac{9}{3}+10.4=3+10.4=13.4$

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The surface area of the solid is about ____ inches squared

Dafna11 [192]

Answer:

Surface area of the whole figure $= 320.28inch^2$

Step-by-step explanation:

The surface area of the figure :

Surface area of the cylinder(excluding top)+Surface area of the cone(excluding bottom)

Radius of the cylinder=3 inch and Height of cylinder=13 inch

Surface area of the cylinder with one circular face

$=2\pi rh+\pi r^2$

As, $\pi =\frac{22}{7}= 3.14$

$=(2*3.14*3*13)+(3.14*3*3)\\\\=244.92+28.26\\\\=273.18inch^2$

Surface area of the cone excluding base:

$=\pi *r*l$

l= slant height=5 inch r= radius= 3 inch

Surface area of the cone = $3.14*3*5$

$=47.1inch^2$

Total surface area of the whole figure $=273.18+47.1$

$= 320.28inch^2$

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3 years ago

K/2 - 1 = 1 solve for k

Nana76 [90]

K=4 would be the answer you’re looking for

6 0

3 years ago

What is 30 divided by 75 and show the work plz?

lions [1.4K]

Answer:

75/30= 2 with a remainder of 15

Step-by-step explanation:

Divide 75 by 30 to get 2

Multiply the quotient digit (2) by the divisor 30

subtract 60 from 75

the solution for long division of 75/ 30 is 2 remainder of 15

convert it to mixed number

2 15/30

4 0

3 years ago

Dy/dx when y=x^2e^5x

vekshin1

I believe the problem asks for the slope. This problem can be done by putting <span>y=x^2e^5x into slope intercept form. However, the issue is that there is the variable "e", which does not match the slope intercept formula, y=mx+b. Long explanation short, the slope is </span> $3e^5x^2$

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3 years ago

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klemol [59]

For this, all you need to do is subtract 2m on both sides, and your answer will be: -1 = m

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3 years ago