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3 years ago

Simplify the polynomial (4n2 + 3n - 5) - (2n2 + 3n+ 6)

Mathematics

2 answers:

scZoUnD [109]3 years ago

5 0

We keep brackets

(4n^2 + 3n - 5 ) - (2n^2 + 3n + 6)

We change signs and we group

4n^2 - 2n^2 + 3n - 3n - 5-6

We simplify

2m^2 - 11

Answer: = 2.n^2 - 11

saul85 [17]3 years ago

3 0

Answer:

2n^2 - 11

steep by steep explanation

=(4n^2 + 3n -5) -(2n^2 + 3n +6)

= 4n^2 +3n -5 - 2n^2 - 3n -6

= 2n^ - 11

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A freight train is traveling at an average rate of 45 miles per hour. Which equation represents the situation? Let h represent t

zvonat [6]

1 h travels 45 miles
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4 years ago

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Where will her cut be located? Round to the nearest tenth. x = (StartFraction m Over m + n EndFraction) (x 2 minus x 1) + x 1 A

Arte-miy333 [17]

Answer:

The correct answer is 25.2 in.

Step-by-step explanation:

It is given that number line goes from 0 to 60 which can be used to represent a ribbon of length = 60 inches.

2 inches of the ribbon are frayed so actual length = 58 inches

Please refer to the attached image for the ribbon.

A is at 0

C is at 60

B is at 2

P is the point to divide the remaining ribbon in the ratio 2:3.

Part AB of the ribbon is frayed.

BP: PC = 2:3

Let BP = 2 $x$ and PC = 3 $x$

Now, BP + PC = BC = 58 = 2 $x$ + 3 $x$ = 5 $x$

So,

$5x =58\\\Rightarrow x =11.6$

BP = $2\times x = 2 \times 11.6 = 23.2\ inches$

Location of the Cut = 2 + 23.2 = 25.2 inches

Alternatively, we can use the formula directly:

$x = \dfrac{m} {m + n } (x_2 - x_1) + x_1$

$x_1 = 2\\x_2 = 60$

m: n is the ratio 2:3

$x = \dfrac{2} {2 +3 } (60- 2) + 2\\\Rightarrow 0.4 (58 )+2\\\Rightarrow 23.2+2 \\\Rightarrow \bold{25.2\ inches}$

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aleksandr82 [10.1K]

The coefficient of the third term in this expression is +2 from the term (+2x).

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3 years ago

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shusha [124]

2x=5y
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so 2x=5y is
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y=-222/(-3)= 74

x=111+y = 111 +74 = 185

so the first number is 185 and the second is 74

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3 years ago

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0 If x and y vary inversely and y=6 as x=7, what is the constant of variation?

gizmo_the_mogwai [7]

Answer:

k = 42

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given that x and y vary inversely then the equation connecting them is

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3 years ago