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Novosadov [1.4K]
3 years ago
7

What type of polynomial is: 2x - 4x - 7+ 6x2

Mathematics
1 answer:
Goshia [24]3 years ago
8 0

Answer:

Trinomial

Step-by-step explanation:

combine like terms which are 2x and 4x, leaving you with 6x^2-2x+7 which is a trinomial

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Solve equation by completing the square round to the nearest hundredth if necessary <br> X2-4x-=5
kipiarov [429]

Answer:

x=-1 and x=5

Step-by-step explanation:

we have

x^{2} -4x=5

Solve it by completing the square method

We take the coefficient of x that is -4, divide it by 2 and then square it

so

-\frac{4}{2}=-2

square it

(-2)^2 = 4

Adds 4 both sides

x^{2} -4x+4=5+4

Combine like terms right side

x^{2} -4x+4=9

Rewrite as perfect squares

(x-2)^{2}=9

take square root both sides

x-2=\pm3

x=2\pm3

therefore

x=2+3=5

x=2-3=-1

6 0
3 years ago
Given an equilateral triangle that has an area of 1959 cm2. What is the length of its sides?
Nina [5.8K]
Equilateral
equi means equal
lateral means sides

all sides are equal
triangle has 3 sides

perimiter=side1+side2+side3
side1=side2=side3


area=1/2 times base times height
base=side
draw a line down the middle of te tiangle so you get 2 right triangles side by side
1/2base is one leg
base is hypotonuse
height is unknown
equilateral means that it is a 30-60-90 triangle with  hypotonuse equal to 2x, height=x√3, bottom is x
1/2 times base times height=1959
1/2 times x times x√3=1959
multiply both sides by 2
(x^2)√3=3918
divide both sides by √3
x^2=3918/√3
square root both sides
x=47.5611
side=hypotonuse=2x
2x=2*47.5611
side=95.12222


legnth of each side is 2\sqrt{ \frac{3918}{ \sqrt{3} } }cm or about 95.12222 cm
7 0
3 years ago
Round 86 to the nearest 10
a_sh-v [17]

Answer:

90

Step-by-step explanation:

3 0
3 years ago
You employ 28 people making an average of $33,000 per year. You want to give every employee a 5% increase for next year. What wi
PilotLPTM [1.2K]
I think the average would increase by $1,650. 5% of 33000 is 1,650. So the the total amount would increase by that.
3 0
3 years ago
What is the inverse of the function​
sleet_krkn [62]

Answer:

x^2-10x+31

Step-by-step explanation:

y=\sqrt{x-6}+5

x=\sqrt{y-6}+5

\sqrt{y-6}+5=x

\sqrt{y-6}+5-5=x-5

\sqrt{y-6}=x-5

\left(\sqrt{y-6}\right)^2=\left(x-5\right)^2

\left(\sqrt{y-6}\right)^2

=\left(\left(y-6\right)^{\frac{1}{2}}\right)^2

=y-6

\left(x-5\right)^2

=x^2-10x+25

y-6=x^2-10x+25

y-6+6=x^2-10x+25+6

y=x^2-10x+31

6 0
3 years ago
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