3 years ago

What ones are correct

Mathematics

1 answer:

GaryK [48]3 years ago

8 0

Answer:

FALSE

TRUE

FALSE

Hope that helps!

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Enter the value of a and b that complete the sum: 3/x + 5/x^2 = ax+b/x^2

Aleksandr [31]

Answer:

a= $\frac{3}{x^{2} }$

b=5

Step-by-step explanation:

we are given

$\frac{3}{x} }$ + $\frac{5}{x^{2} }$ =ax+ $\frac{b}{x^{2} }$

we will compare both sides of equaion

$\frac{b}{x^{2} }$ = $\frac{5}{x^{2} }$

comparing both sides we get

b=5

and

$\frac{3}{x} }$ =ax

a= $\frac{3}{x^{2} }$

hence

a= $\frac{3}{x^{2} }$

and b=5

4 0

4 years ago

A rectangular plot of land that contains 1500 square meters will be fenced and divided into two equal portions by an additional

photoshop1234 [79]

Let the length be x and the width be w

The perimeter will be:
2x+3w=1500

thus
3w=(1500-2x)
w=(1500-2x)/3
w=500-2/3x

The area will be:
A=x*w
A=x(500-2/3x)
A=500x-(2/3)x²

The above is a quadratic equation; thus finding the axis of symmetry we will evaluate for the value of x that will give us maximum area.

Axis of symmetry:
x=-b/(2a)
from our equation:
a=(-2/3) and b=500
thus
x=-500/[2(-2/3)]
x=375
the length will be 375 m

The width will be 250 m

4 0

3 years ago

Brian has 3/4 hour to work on his math problem. It takes him 1/8 hour to finish one math problem. How many math problems can bri

Sergeu [11.5K]

B is the answer for the answer you asked

4 0

3 years ago

Read 2 more answers

141/56 as a mixed number

elixir [45]

I believe its 2 and 1/2

I'm so sorry if its not but I would guess it is :)

6 0