1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mamaluj [8]
3 years ago
6

Find a vector equation and parametric equations for the line. (Use the parameter t.) The line through the point (1, 0, 9) and pe

rpendicular to the plane x + 2y + z = 7
Mathematics
1 answer:
inn [45]3 years ago
7 0

Answer:

r=<1,0,9>+t<1,2,1>

and

x=1+t

y=2t

z=9+t

Step-by-step explanation:

A vector perpendicular to the plane :

ax+by+cz+d=0

is given by (a,b,c)

So a vector perpendicular to given plane will have :

(1,2,1)

The\ parametric\ equation\ of\ a\ line\ through\ (1,0,9)\ and\ parallel\ to\ vector\ (a,b,c) is\ given\ by:\\x=x_0+ta\\y=y_0+tb\\z=z_0+tb\\x=1+t(1)\\x=1+t\\y=0+t(2)\\y=2t\\z=9+t(1)\\z=9+t\\The\ vector\ form\ is:\\r=+t ..

You might be interested in
A room covers 299.6 square feet. A painter paints the room in three days. The first day he covers 2/7 of the area. The next day
Trava [24]

Answer:

<em>On day the he covers </em>128.4 ft²

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

Lets first figure out how much he has done so far

To figure out how much he does we can use a proportion

Set up a proportion for first day

2/7 = x/299.6

Solve the proportion

2×299.6÷7 = 599.2/7 = x

x = 85.6

<em>He covered 85.6 sq/ft on day 1</em>

Find day two

85.6 * 2 = 171.2

Find how much is left to do on day 3

299.6-171.2 = 128.4 ft²

4 0
3 years ago
Read 2 more answers
Solve the inequality 2x2 + 10x &lt; –8
BigorU [14]

Answer:

-4<x<-1

Step-by-step explanation:

To solve the problem, we divide the whole expression by 2:

2x^2 + 10x < –8 → x^2 + 5x < –4

→  x^2 + 5x + 4 < 0

Factorizing

→ (x+4)(x+1) < 0

The expression is ONLY negative when:

x>-4 and x<-1

Therefore, the solution is:

-4<x<-1

5 0
3 years ago
Find the volume of the cylinder.<br><br> r = 5 cm<br><br> h = 9 cm
kvasek [131]

Answer:

About 706.5 or 707

Explanation:

3.14 • 5² (5² is also 25) = 78.5

78.5 • 9 = 706.5 or 707

Edit: Also posted a better picture for explanation. See the attachment.

5 0
3 years ago
Which of the following statements about UK and UL is true?
dedylja [7]

Answer:

B

Step-by-step explanation:

7 0
3 years ago
Complete the table of values
Agata [3.3K]
Both problems give you a function in the second column and the x-values. To find out the values of a through f, you need to plug in those x-values into the function and simplify! 

You need to know three exponent rules to simplify these expressions:
1) The negative exponent rule says that when a base has a negative exponent, flip the base onto the other side of the fraction to make it into a positive exponent. For example, 3^{-2} =&#10;\frac{1}{3^{2} }.
2) Raising a fraction to a power is the same as separately raising the numerator and denominator to that power. For example, (\frac{3}{4}) ^{3}  =  \frac{ 3^{3} }{4^{3} }.
3) The zero exponent rule<span> says that any number raised to zero is 1. For example, 3^{0} = 1.
</span>

Back to the Problem:
Problem 1 
The x-values are in the left column. The title of the right column tells you that the function is y =  4^{-x}. The x-values are:
<span>1) x = 0
</span>Plug this into y = 4^{-x} to find letter a:
y = 4^{-x}\\&#10;y = 4^{-0}\\&#10;y = 4^{0}\\&#10;y = 1
<span>
2) x = 2
</span>Plug this into y = 4^{-x} to find letter b:
y = 4^{-x}\\ &#10;y = 4^{-2}\\ &#10;y =  \frac{1}{4^{2}} \\  &#10;y= \frac{1}{16}
<span>
3) x = 4
</span>Plug this into y = 4^{-x} to find letter c:
y = 4^{-x}\\ &#10;y = 4^{-4}\\ &#10;y =  \frac{1}{4^{4}} \\  &#10;y= \frac{1}{256}
<span>

Problem 2
</span>The x-values are in the left column. The title of the right column tells you that the function is y =  (\frac{2}{3})^x. The x-values are:
<span>1) x = 0
</span>Plug this into y = (\frac{2}{3})^x to find letter d:
y = (\frac{2}{3})^x\\&#10;y = (\frac{2}{3})^0\\&#10;y = 1
<span>
2) x = 2
</span>Plug this into y = (\frac{2}{3})^x to find letter e:
y = (\frac{2}{3})^x\\ y = (\frac{2}{3})^2\\ y = \frac{2^2}{3^2}\\&#10;y =  \frac{4}{9}
<span>
3) x = 4
</span>Plug this into y = (\frac{2}{3})^x to find letter f:
y = (\frac{2}{3})^x\\ y = (\frac{2}{3})^4\\ y = \frac{2^4}{3^4}\\ y = \frac{16}{81}
<span>
-------

Answers: 
a = 1
b = </span>\frac{1}{16}<span>
c = </span>\frac{1}{256}
d = 1
e = \frac{4}{9}
f = \frac{16}{81}
5 0
3 years ago
Other questions:
  • What is the slope of the line graphed on the coordinate plane?
    15·2 answers
  • To decrease an amount by 85% what single multiplier would i need to use?
    11·1 answer
  • UW || RS
    6·2 answers
  • If ƒ(x) = 15x + 7 and g(x) = x2 – 5x, find (ƒ + g)(x).
    5·1 answer
  • the area of a rectangle is 162 square meters. if the length is 18 meters, what is the perimeter of the rectangle
    7·1 answer
  • Calculate the speed of an airplane that moves 50 meters in one second in both cm/s and km/s
    10·1 answer
  • Solve the inequality r-8
    14·1 answer
  • Question B help me please
    13·1 answer
  • What is the volume of the following rectangular prism?
    15·1 answer
  • Helppppp me pleaseeee !
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!