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3 years ago

(10x2 - x + 1) – (9x - 2)

Mathematics

2 answers:

kolbaska11 [484]3 years ago

8 0

Answer: find out what x is

Step-by-step explanation:

Fudgin [204]3 years ago

7 0

Answer:

-10x+23

Step-by-step explanation:

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Please help !!! It’s due today

spin [16.1K]

Answer: D

Step-by-step explanation:

the second one cant be it because its negative and it would end in a negative result and 3,1 is equal to 2x-5 on the graph

7 0

3 years ago

Triangle ABC has vertices at (-3, -1), (-1, 2) and (6, 1). What is the perimeter of triangle ABC, rounded to the nearest tenth?

Marta_Voda [28]

$Perimeter=19.9units$

Why?

We can find the perimeter of any triangle adding the length of its sides. Since we are given 3 points, we need to calculate the length of the three sides of the triangle, and then add them to know the perimeter of the triangle.

Let be the points:

A(-3,-1)

B(-1,2)

C(6,1)

<h3>- Distances</h3>

From A to B:

$d(A,B)=\sqrt{(-1-(-3))^{2}+(2-(-1)^{2}}\\\\d(A,B)=\sqrt{(2)^{2}+(3)^{2}}=\sqrt{4+9}=3.61units$

From A to C:

$d(A,C)=\sqrt{6-(-3))^{2}+(1-(-1)^{2}}\\\\d(A,B)=\sqrt{(9)^{2}+(2)^{2}}=\sqrt{81+4}=9.22units$

From B to C:

$d(B,C)=\sqrt{6-(-1))^{2}+(1-2)^{2}}\\\\d(A,B)=\sqrt{(7)^{2}+(-1)^{2}}=\sqrt{49+1}=7.07units$

Now, calculating the perimeter, we have:

$Perimeter=d(A,B)+d(A,C)+d(B,C)=3.61units+9.22units+7.07units\\\\Perimeter=19.9units$

Have a nice day!

5 0

3 years ago

5/3+5/3+5/3 = how to solve

Vsevolod [243]

15/3 = 5
divide 15 by 3

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3 years ago

Mario needs 1024 MB to make a backup of his computer files, for this he has 3 USB memories with a capacity of 256 MB. How many U

Brut [27]

256 x 3 is uhh 768 so it would be 2 of the 128 sticks

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3 years ago

Read 2 more answers

The graph below shows the total costy (in dollars) of owning and operating a compact car

PIT_PIT [208]

The relationship between the cost and the miles driven, as presented on the graph is an illustration of a linear equation or a linear graph.