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noname [10]
4 years ago
13

Adding polynomial expressions

Mathematics
1 answer:
slamgirl [31]4 years ago
3 0

Answer:Start with: 1.2x2 + 6x + 5 + 3x2 − 2x − 1.

2.Place like terms together:2x2+3x2 + 6x−2x + 5−1.

3.Which is:(2+3)x2 + (6−2)x + (5−1)

4.Add the like terms:5x2 + 4x + 4.

Step-by-step explanation:

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Black_prince [1.1K]
The answer is 10 i believe 
4 0
4 years ago
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Is the relationship shown by the data linear? If so, model the data with an equation.
zhenek [66]

Answer:

Therefore the equation of the line through ( -7 , 5 ) and ( -5 , 9) is

Linear Relationship i.e y-5=2(x+7)

Step-by-step explanation:

Given:

Let,

point A( x₁ , y₁) ≡ ( -7, 5 )  

point B( x₂ , y₂) ≡ (-5, 9)  

To Find:

Equation of Line AB =?

Solution:

Equation of a line passing through Two points A( x₁ , y₁) and B( x₂ , y₂)is given by the formula

(y - y_{1} )=(\frac{y_{2}-y_{1} }{x_{2}-x_{1} })\times(x-x_{1}) \\

Substituting the given values in a above equation we get

(y-(5))=(\frac{9-(5)}{-5--7})\times (x--7)\\ \\(y-5)=\frac{4}{2}(x+7)\\\\y-5=2(x+7)...............\textrm{which is the required equation of the line AB}

Therefore the equation of the line through ( -7 , 5 ) and ( -5 , 9 ) is

Linear Relationship i.e y-5=2(x+7)

4 0
3 years ago
A man that is 6ft sits next to a tree. His shadow is 27ft. The tree leaves a 81ft shadow. How tall was the tree.
KonstantinChe [14]
Simply cross multiply the proportion of
6/27= x/81 do 6•81 divided my 27 for your answer which is 18
3 0
4 years ago
Three boys were running around the track. The first can run 1 lap in 15 min. The second can run 1 lap in 25 min. and the third c
Juliette [100K]

Answer:

At 15:15

Step-by-step explanation:

Given,

the 1st boy can run a lap in 15 minutes

the 2nd boy can run a lap in 25 minutes

the 3rd boy can run a lap in 10 minutes

Now if they start running at 12:45,they will meet after the time which will be equal to the L.C.M. of their time need to run a lap.

L.C.M. of 15,25 & 10 = 150

So,they will pass each other after 150 minutes or 2 hours & 30 minutes.

If we add it with 12:45 we'll get 15:15 or 3:15 pm

3 0
4 years ago
​A model of an Egyptian pyramid has a slant height of 18 centimeters and a 15-centimeter square base. What is the surface area o
Angelina_Jolie [31]

Answer:

here is an example to guide you

Step-by-step explanation:

To find how much paper for the model, you will use the formula for area of a square and area of a triangle.

A = bh

7.2 x 7.2

A = 51.84 cm²

A = 1/2bh

1/2 x 7.2 x 6

A = 21.6 cm²

21.6 cm² x 4 = 86.4 cm²

86.4 + 51.86=138.3

You will need 138.3 cm² of paper.

4 0
3 years ago
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