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ss7ja [257]
3 years ago
5

What is the value of x? Enter your answer in the box.

Mathematics
1 answer:
Drupady [299]3 years ago
5 0

Answer:

x = 111

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Here n = 7 , then

sum = 180° × 5 = 900

Sum the interior angles and equate to 900

x + 139 + 121 + 125 + 126 + 158 + 120 = 900

x + 789 = 900 ( subtract 789 from both sides )

x = 111

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Find a vector equation and parametric equations for the line segment that joins p to q. p(1, −1, 7), q(7, 6, 1) vector equation
AleksAgata [21]
Answers: 

- vector equation: r(t) = <1 + 6t, -1 + 7t, 7 - 6t> 
- parametric equations:   
      x = 1 + 6t
      y = -1 + 7t
      z = 7 - 6t

Explanation:

To obtain the vector equation, we first get a vector v that is parallel to the line. To get the vector v, we subtract p from q. So,

v = q - p
   = (7,6,1) - (1,-1,7)
v  = (6, 7, -6)

The vector equation of the line is given by

r(t) = v_0 + tv

Where

v_0 = a point in the line (we choose point p(1,-1,7))

So, the equation of the line joining p and q is given by

r(t) = v_0 + tv&#10;\\ \indent = \left \langle 1, -1, 7 \right \rangle + t\left \langle 6, 7, -6 \right \rangle&#10;\\ \indent = \left \langle 1, -1, 7 \right \rangle + \left \langle 6t, 7t, -6t \right \rangle&#10;\\ \indent \boxed{r(t) = \left \langle 1 + 6t, 1 + 7t, 7 - 6t \right \rangle }

In the parametric equation of the line, we just need to get the x, y and z coordinates in the vector equation.

Since the vector equation is given by 

r(t) = \left \langle 1 + 6t, 1 + 7t, 7 - 6t \right \rangle

The parametric equations of the line are given by:

x(t) = 1 + 6t&#10;\\y(t) = 1 + 7t&#10;\\z(t) =  7 - 6t


4 0
3 years ago
A cone has a radius of 5 inches and a hight of inches what is the volume of the cone
Nataly_w [17]

Answer:

130.8

Step-by-step explanation:

I did the quiz

7 0
3 years ago
A skyscraper with 103 floors is 1133 feet tall. Each floor is the same height. How tall is each floor
harkovskaia [24]
Hello!

Simply divide the number of floors by the height of the skyscraper to find out how tall each floor will be.

1,133 + 103 = 11

A N S W E R:

Each floor is 11 feet tall.

Have a wonderful day!
4 0
3 years ago
Read 2 more answers
One number is 2 less than a second number. Twice the second number is 5 less than 3 times the first. Find the two numbers.
Evgen [1.6K]

Answer:

9 and 11  

Step-by-step explanation:

First number = x -2

Second number = x

  and   2x = 3(x-2)  - 5

            2x = 3x - 6 - 5

             x = 11

              first number = 11-2 = 9

8 0
2 years ago
Find the difference.<br> (4m^2 - m+2) - (-3m^2+ 10m + 4) =(
poizon [28]
<h2><u>Answer:</u></h2>

7m^2 - 11m - 2

<h2><u>Step-by-step explanation:</u></h2>

Distribute the negative.

4m^2 - m + 2 + 3m^2 - 10m - 4 = ?

Now, add the like terms.

4m^2 + 3m^2 = 7m^2

-m + (-10m) = -11m

2 + (-4) = -2

7m^2 - 11m - 2

5 0
3 years ago
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