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Inessa05 [86]
2 years ago
13

I don't understand anything, please help :(

Mathematics
1 answer:
Butoxors [25]2 years ago
4 0

Answer:

i dont know

Step-by-step explanation:

i dont know how to do it

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What is equivalent to 7x(4x-5)
Ad libitum [116K]

7x(4x-5)

Distribute

28x^2-35x

Ans : 28x^2-35x

5 0
3 years ago
Read 2 more answers
The cup was filled at a constant rate. It started empty. After 2 seconds, it held 70 cm^3 of water.
nydimaria [60]

Answer:

About 90%

Step-by-step explanation:

If the cup was filled at a constant rate, then the cup fills at 70/2=35 cubic centimeters per second. The formula for the volume of a cone is \frac{1}{3} \pi r^2 h, or in this case \frac{112}{3}\pi cubic centimeters. After 3 seconds, the cup would have 35*3=105 cubic centimeters of water inside of it, or about 89.52% which rounds to 90%. Hope this helps!

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3 years ago
True or false: Least squares regression problems always have a unique solution, since they are modelled by the normal equation
Vilka [71]

Answer: (((trueeee))))

4 0
2 years ago
Evaluate the surface integral. S xz ds, s is the part of the plane 2x 2y z = 4 that lies in the first octant
maksim [4K]

The value of the given surface integral is 4.

The given plane intercepts the coordinate axes at (2, 0, 0), (0, 2, 0), and (4, 0, 0). These point are the coordinates of a triangular region that we can parameterize using.

S(u,v)=(1-u)((1-u)(2,0,0)+u(0,2,0)+u(4,0,0)\\S(u,v)=(2(1-u)(1-v),2u(1-v),4v)

<h3>What is the surface integral?</h3>

A surface integral is a generalization of multiple integrals to integration over surfaces. It can be thought of as the double integral analog of the line integral. Given a surface, one may integrate a scalar field over the surface or a vector field.

with 0≤u≤1 and  0≤v≤1. Then the surface element ds  is equivalent to

ds=\||\:\left(s_u\times \:\:S_v\right)||dudv=12\left(1-v\right)dudv

The surface integral is then

\int \:\int \:_Sxzds=12\int _0^1\:\int _0^1\:\left(2\left(1-u\right)\left(1-v\right),2u\left(1-v\right),4v\right)dvdu=4

Therefore the value of the given surface integral is 4.

To learn more about the integral visit:

brainly.com/question/14295614

#SPJ2

6 0
2 years ago
A company advertises two car tire models. The number of thousands of miles that the standard model tires last has a mean \mu_S =
Andrew [12]

Answer:

0.123

Step-by-step explanation:

5 0
3 years ago
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