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2 years ago

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Subtract the polynomials (7.8x - 3.4y + z) and (-9.2x + 4.8y - 2.1z), then place the answer in the proper location on the grid.

Write answer in x-y-z order and include the tenths place.

2 answers:

Naya [18.7K]2 years ago

6 0

Subtracting the polynomials will give us:
(7.8x-3.4y+z)-(-9.2x+4.8y-2.1z)
=(7.8x+9.2x)+(-3.4y-4.8y)+(z+2.1z)
=17x-8.2y+3.1z

Answer: 17x-8.2y+3.1z

wolverine [178]2 years ago

3 0

Answer:

$17.0x-8.2y+3.1z$

Step-by-step explanation:

We are given that two polynomials

(7.8x-3.4y+z) and (-9.2x+4.8y-2.1z)[/tex]

We have to subtract the polynomials.

$(7.8x-3.4y+z)-(-9.2x+4.8xy-2.1z)$

Open the bracket

$7.8x-3.4y+z+9.2x-4.8y+2.1z$

Rearrange the terms

$(7.8x+9.2x)-(3.4y+4.8y)+(z+2.1z)$

Combine like terms

$17.0x-8.2y+3.1z$

Hence, the answer is given by

$17.0x-8.2y+3.1z$

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The length of a 200 square foot rectangular vegetable garden is 4feet less than twice the width. Find the length and width of th

inna [77]

Answer:

Length = 18.099 ft

Width = 11.049 ft

Step-by-step explanation:

let the length of the field be x ft

and the width be y ft

as per the condition given in problem

x=2y-4 -----------(A)

Also the area is given as 200 sqft

Hence

xy=200

Hence from A we get

y(2y-4)=200

taking 2 as GCF out

2y(y-2)=200

Dividing both sides by 2 we get

$y(y-2)=100$

$y^2-2y=100$

subtracting 100 from both sides

$y^2-2y-100=0$

Now we solve the above equation with the help of Quadratic formula which is given in the image attached with this for any equation in form

$ax^2+bx+c=0$

Here in our case

a=1

b=-1

c=-100

Putting those values in the formula and solving them for y

$y=\frac{-(-2)+\sqrt{(-2)^2-4 \times (-1) \times 100}}{2 \time 1}$

$y=\frac{-(-2)-\sqrt{(-2)^2-4 \times (-1) \times 100}}{2 \time 1}$

Solving first

$y=\frac{2+\sqrt{4+400}{2}$

$y=\frac{2+\sqrt{404}{2}$

$y=\frac{2+20.099}{2}$

$y=\frac{22.099}{2}$

$y=11.049$

Solving second one

$y=\frac{-(-2)-\sqrt{(-2)^2-4 \times (-1) \times 100}}{2 \time 1}$

$y=\frac{2-\sqrt{4+400}{2}$

$y=\frac{2-\sqrt{404}{2}$

$y=\frac{2-20.099}{2}$

$y=\frac{-18.99}{2}$

$y=-9.045$

Which is wrong as the width can not be in negative

Our width of the field is

y=11.099

Hence the length will be

x=2y-4

x=2(11.049)-4

x=22.099-4

x=18.099

Hence our length x and width y :

Length = 18.099 ft

Width = 11.049 ft

4 0

2 years ago

Can anybody help with my work

quester [9]

I think the answer is 20.34 I might be wrong someone else could check

5 0

1 year ago

Read 2 more answers

If i was asked to think of a number and multiply it by 2, I could write this algebraically as 2x.write the following agebraicall

oksano4ka [1.4K]

I think it’s 3x = y + 1

7 0

2 years ago

P% of m PLEASE HELP IMMEDIATELY

Aleonysh [2.5K]

Answer:

pm/ 100 is answer.

Step-by-step explanation:

here, p% of m

=p/100× m

= pm/ 100 ...is answer.

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4 0

2 years ago

I need help with this

Mademuasel [1]

Answer:

30/90 = 1/3

60/120 = 1/2

7/49 = 1/7

if you're doing mixed numbers:

30/90 = 3

60/120= 0 1/5

7/49= I couldn't tell ya that one exactly.

Step-by-step explanation:

5 0

2 years ago