# Calculus help, calculus homework help

*label*Mathematics

*timer*Asked: Nov 22nd, 2016

*account_balance_wallet*$20

### Question Description

Was able to complete half of the problems but need help with these 2,4,5,6,8,10,12,16,18

### Unformatted Attachment Preview

## Tutor Answer

Here are the answers. let me know if you have any questions.thanks and bye

2.

y=(x-1)……………..(1)

y=(x-1)3…………..(2)

Substituting value of (x-1) from equation (1) to equation (2), we get

y=y3

or, y2=1

so, y=+1 and y=-1

for y=+1, we substitute the value of y in equation (1)

1=x-1

Or, x=2

for y=-1, we substitute the value of y in equation (1)

-1=x-1

Or, x=0

Answers are : x=2,y=1 or x=0,y=-1

This can be seen graphically below: From the curve also we see that the two curves intersect at

: x=2,y=1 and x=0,y=-1

Fig: blue curve is for y=(x-1)3 and red curve is for y=x-1

4.

Equations are:

2x+5y=-11…….(1)

5x-y=19…………(2)

Multiply equation (1) by 5

10x+25y=-55……………..(3)

Multiply equation (2) by 2

10x-2y=38…………………(4)

Subtract equation (4) from equation (3)

10x+25y-10x+2y=-55-38

Or, 27y=-93

So, y=-31/9

Plugging in the value of ...

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