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blagie [28]
3 years ago
11

(−2x^2+x+1)–(x^2–x+7)–(4x^2+2x+8) Please explain

Mathematics
1 answer:
uranmaximum [27]3 years ago
7 0

Answer:

-7x^2-14

Step-by-step explanation:

First, remove the parenthesis.  Remember to distribute the negatives properly!

(-2x^2+x+1)-(x^2-x+7)-(4x^2+2x+8)\\-2x^2+x+1-x^2+x-7-4x^2-2x-8

Next, rearrange the order of the numbers so it's easy to see the like terms.  Put the squared x's together, x's together, etc.  <em>This step is optional but helpful.</em>

-2x^2-x^2-4x^2+x+x-2x+1-7-8

Next, combine like terms.

-7x^2+0x-14\\-7x^2-14

Leave a note in the comments if you need me to elaborate on any steps.

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I really need help can someone please help me I posted this before but no one answers pls help me quick don't be like other fool
solmaris [256]
P = 4ft

Explanation:
take 5 and 3, add them together = 8. "straight down to double its distance" so that would mean to do either 8 divided by 2 or 4 x 2. 4 x 2 - 3 = 5 (5 = final position). p = 4ft
8 0
2 years ago
What are the y-intercepts of this conic section?
harina [27]

Step-by-step explanation:

the second one, of course.

a y-intercept is a point where x = 0.

the 2 options are clearly having y-values of -2 and +2.

7 0
2 years ago
Solve appropriate word problems by modeling them with linear equations in two variables.
Nesterboy [21]

<em><u>The cost of production equation is:</u></em>

C = 10n + 20000

<em><u>Solution:</u></em>

<em><u>The equation representing the cost, C, of producing n tires at Royal Tires Co. can be written as:</u></em>

C = mn + f

Where,

C = cost

n = number of tires

f = company's fixed cost

<em><u>It costs $30,000 to produce 1,000 tires while it costs $50,000 to produce 3,000 tires</u></em>

Therefore,

30, 000 = m(1000) + f

50, 000 = m(3000) + f

Which is,

1000m + f = 30000 ------- eqn 1

3000m + f = 50000 ------- eqn 2

Subtract eqn 1 from eqn 2

3000m + f = 50000

1000m + f = 30000

( - ) -------------------

2000m = 20,000

m = 10

Substitute m = 10 in eqn 1

1000(10) + f = 30000

f = 30000 - 10000

f = 20,000

Thus the equation is:

C = 10n + 20000

6 0
3 years ago
11. The length of a rectangle is 2 more than the width. The perimeter is 32. Find the
Oduvanchick [21]

Answer:

length = 9, width = 7

Step-by-step explanation:

length = l, also w+2                 width = w

perimeter = 2w + 2l

create an equation: 32 = 2(w) + 2(w+2)

simplify

32 = 2w+2w+4

32 = 4w+4

28=4w

w=7

solve for length

l = w+2

l=7+2

l=9

4 0
3 years ago
A box of manufactured items contains 12 items. of which four are defective
VikaD [51]
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4 0
3 years ago
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