2 years ago

Choose the graph that matches the following system of equations: 4x + y = −1 3x + 2y = 8

Mathematics

2 answers:

Nadusha1986 [10]2 years ago

4 0

Umm....where is the graph?
or is it just my computer????

arlik [135]2 years ago

3 0

Answer:

Step-by-step explanation:

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A trapezoid is defined as a quadrilateral with only 1 pair of parallel sides. Since your Quadrilateral has 2 pairs, it can't be a trapezoid.

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3 years ago

Mr. Hare left at 8:00 a.m. and is traveling 50 miles per hour. Mrs. Hare left at 9:00 a.m. and is traveling at 55 miles per hour

SVETLANKA909090 [29]

Answer: B 8:00pm

Step-by-step explanation:

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PLEASE HELP I WILL GIVE BRAINLIEST! (IF CORRECT)!

Valentin [98]

Answer:

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Step-by-step explanation:

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3 years ago

Let the region R be the area enclosed by the function f(x)=ln(x) and g(x)= 1/2x-2. Find the volume of the solid generated when t

Neporo4naja [7]

Answer:

$V=61.66$

Step-by-step explanation:

This problem can be solved by using the expression for the Volume of a solid with the washer method

$V=\pi \int \limit_a^b[R(x)^2-r(x)^2]dx$

where R and r are the functions f and g respectively (f for the upper bound of the region and r for the lower bound).

Before we have to compute the limits of the integral. We can do that by taking f=g, that is

$f(x)=g(x)\\ln(x)=\frac{1}{2}x-2$

there are two point of intersection (that have been calculated with a software program as Wolfram alpha, because there is no way to solve analiticaly)

x1=0.14

x2=8.21

and because the revolution is around y=-5 we have

$R=ln(x)-(-5)\\r=\frac{1}{2}x-2-(-5)\\$

and by replacing in the integral we have

$V=\pi \int \limit_{x1}^{x2}[(lnx+5)^2-(\frac{1}{2}x+3)^2]dx\\$

$V=\pi [28x+\frac{1}{x}+xln^2x-12xlnx-6lnx]$

and by evaluating in the limits we have

$V=61.66$

Hope this helps

regards

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2 years ago

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Nataly [62]

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