Answers
Answer:
a
Step-by-step explanation:
Given
u = (x₁, y₁, z₁ ) and v = (x₂, y₂, z₂ ) then the dot product is
u • v = (x₁ x₂ ) + (y₁ y₂ ) + (z₁ z₂ )
Then
v • w
= (5 × 9) + (- 4 × - 2) + (4 × 7)
= 45 + 8 + 28
= 81 → a
Related Questions
Find the difference of the complex numbers.
(2 +8i)-(-5 - 3i)
Answers
Answer:
7 + 11i
Step-by-step explanation:
Simplify: (2 +8i)-(-5 - 3i) = 2 + 8i + 5 + 3i
Add real numbers to real numbers and imaginary to imaginary: 2 + 8i + 5 + 3i = 7 + 11i
A complex number can be shown as a pair of integers (a, b). The difference of the complex number (2 +8i)-(-5 - 3i) is 7+11i.
What is a complex number?A complex number can be shown as a pair of integers (a, b) forming a vector on an Argand diagram, which represents the complex plane.
The difference of the complex number can be done as following,
(2+8i)-(-5-3i)
= 2 + 8i + 5 + 3i
= 5+2 + 8i+3i
= 7 + 11i
Hence, the difference of the complex number (2 +8i)-(-5 - 3i) is 7+11i.
Learn more about Complex Number:
https://brainly.com/question/10251853
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To solve for n, I should do what to both sides of the equation? n - 8 = 13
A. Add 8 to both sides of the equation.
B. Subtract 8 from both sides of the equation.
C. Subtract 13 from both sides of the equation.
D. Add 13 to both sides of the equation.
Answers
2a+3b as a column vector
Answers
Answer:
Step-by-step explanation:
what is this simplify?
Answers
Answer:
D. 2^7
Step-by-step explanation:
Answer:
2^7
Step-by-step explanation:
When we multiply the same bases with exponents like 2^3*2^4 we can add the exponents and keep the base the same
2^7 would be the answer or you can simplify further to get 128
but they said simplify so 2^7 is the answer
If they said evaluate then our answer is 128
pls help me a little quick problem!! ty :)
Answers
Answer:
(8-b)/6
Step-by-step explanation:
give me Brainllest Plz
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Answers
Answer:
its C
Step-by-step explanation:
You and your friend are watching a television show . One of your friends ask,'How long are the commercials breaks during this show ?"
Time (minutes)
4.2 3.5 4.55 2.75 2.25
A . Use the mean of the values in the table to answer question
Commercial breaks average ___ minutes
Answers
3.45 (4.2+3.5+4.55+2.75+2.25)/5
what is this help me out pls
Answers
Answer:
That would be -2n - 1.
Answer:
-2n - 1
Step-by-step explanation:
You have to combine like term which would be 4n,n,and 7n.
Since n doesn't have a variable just add a one in front. So now the equation would be
1n+4n-7n That equation equals -2n
Now just add the remaining number
So that makes the answer -2n -1
I'll give you the brainiest if your answer is right.
Answers
Answer:
=54
Step-by-step explanation:
give me the brainiest
Answer:
ACD would equal 117 degrees. ACB would equal 63 degrees.
What is the slope formula?
How do you find slope?
Answers
Answer:
https://www.gstatic.com/education/formulas2/355397047/en/slope_of_a_line.svg
Step-by-step explanation:
To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points.
Answer:
cmon bro is not that hard
Step-by-step explanation:
Select the statement that describes the expression 5 x (8 − 5) ÷ 3.
5 times the sum of 8 and 5, then divide by 3
5 times the product of 8 and 5, then divide by 3
5 times the difference of 8 and 5, then divide by 3
5 times the difference of 8 and 5, then add 3
Answers
Answer:
Step-by-step explanation:
5 x (8 − 5) ÷ 3 5 times
5 x (8 − 5) ÷ 3 the difference of 8 and 5
5 x (8 − 5) ÷ 3 then divide by 3
5 times the difference of 8 and 5 then divide by 3
The angle of elevation of an electricity pole from a point 8 metres from its base is 52.7 degrees. What is the height of the pole?
Answers
Answer:
10.5m
Step-by-step explanation:
We solve the above question, using the Trigonometric function of Tangent
tan θ = Opposite/Adjacent
θ = 52.7 °
Adjacent = 8 m
Opposite = x
Hence,
tan 52.7= x/8m
Cross Multiply
x = tan 52.7 × 8m
x = 10.501501092m
Approximately = 10.5 m
Therefore, the height of the pole = 10.5m
please help me with this! ( links = report )
Answers
Answer: 7 mi
r = √153.9/pi
r = √49.01
r = 7
Which scatterplot shows a linear association?
Answers
Therefore, the answer would be C, as you had it, because it is showing the data in a straight line.
Answer:
C
Step-by-step explanation:
i need help i literally don't understand this at all and the teacher doesn't explain the assignment at all.
Answers
Answer:
2) 67.8°
3) 46.8°
4) 56.0°
Step-by-step explanation:
Use the right triangle trig functions
sine, cosine, or tangent and take the inverses to find the angle
A rake was marked up 25% from an original cost of $8.80. Last Friday, Dean bought the rake and paid an additional 3% in sales tax. What was his total cost?
Answers
Answer:
$11.33
Step-by-step explanation:
First I did 8.80 x 0.25 and I got 11. Than I did 11.00 x 0.03 and I got $11.33. The total cost was $11.33
The total cost of the rake is $11.33.
What is the sales tax?Calculating the sales tax applied to a purchase is a matter of simply multiplying the tax rate by the purchase price using the equation sales tax = purchase price × sales tax rate. Adding the sales tax to the original purchase price gives the total price paid with tax.
Given that, a rake was marked up 25% from an original cost of $8.80.
25% of the original cost of $8.80 is
0.25×8.80 =$2.2
So the marked up price was 8.80+2.20
= $11
He then paid an additional 3% in sales tax, that is
11 + 0.03×11 = $11.33
Therefore, the total cost of the rake is $11.33.
To learn more about the sales tax visit:
brainly.com/question/27092799.
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What is the answer?
Please answer quickly!
Thank you so much
Answers
Answer:
x=11
Step-by-step explanation:
Hi, there you are using are multiplying so you have to add the exponets 3 and 8 which would equal to 11
PLEASE HELP!!!!! Thank you!! Will mark brainliest!!!
| x+14 | = 14
| x-14 | = 14
| x+8| = x+8
Answers
Answer:
if youre just looking for x, it would be x=0.
Step-by-step explanation:
the absolute value of any number is just the positive version of that number. So, |0+14|=14 and the same for the rest of them.
Please answer all of them! SHOW WORK!!
Answers
Match each expression to its exponential form.
Answers
10^2 = 10 × 10
10^3 = 10 × 10 × 10 = 1000
10^4 = 10 × 10 × 10 × 10
Grace and her brother need $400 to go to band camp. Their parents have agreed
to help them earn money by paying them $25 each time they mow the lawn
and $10 for each hour they babysit their younger brother. They will have to do a
combination of both chores to earn the money.
Select the equation that represents the number of lawns they can mow, m, and
hours they can babysit, b, to earn $400.
M. 10m + 25b = 400
P.
10m - 25b = 400
R. 25m + 10b = 400
S. 25m - 10b = 400
Answers
Answer:
R. 25m + 10b = 400
Step-by-step explanation:
25m: $25 for time the mow the lawn
10b: $10 for every hour that they babysit their younger brother
400: They need $400 in total
+ : You need to add what they made for mowing the lawn and for babysitting.
b) solve for x if x² +3x - 4 <0
Answers
Answer:
x=4,−1
Step-by-step explanation:
hope i helped
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and have a nice day:)
Those are-3 and 1-
(X-3) (x-1)
X=3 X=1
Now let’s check to make sure that when plugged in the answer is over 0.
3^2+3(3)-4=
9+9-4=14
14 is greater than 0
✅
1^2+3(1)-4=
1+3-4=0
0 is not greater than 0
So x is 3
Which of the following represents a proportional relationship?
Use the picture for context ⬆️
Answers
Answer:
the answer with the proportional relationship is "(D)"
determine the intercepts of the line
Answers
Answer:
(0, -5/2), (-2, 0)
Step-by-step explanation:
To find the y-intercept, set x = to 0 and find y: -4y = 10. Thus, y = -5/2. The y-intercept is (0, -5/2).
To find the x-intercept, set y = to 0 and fid x: -5x = 10. Therefore the x-intercept is -2: (-2, 0)
The circumference of a circle is 18π in. What is the area, in square inches? Express your answer in terms of \piπ.
Answers
Answer:
A = 81π
Step-by-step explanation:
if circumference is 18π then diameter is 18 and radius is 9
A = πr²
A = 9²π or 81π
"You purchase a vintage car for $140,000 and it appreciates (i.E. Increases in value) by 4% annually. How much will the car be worth in 10 years?"
Answers
Answer:
Future Value= $207,234.2
Step-by-step explanation:
Giving the following formula:
Initial value (PV)= $140,000
Appreciation rate (r)= 4% = 0.04
Number of years (n)= 10
To calculate the future value of the car after ten years, we need to use the following formula:
FV= PV*(1+i)^n
FV= 140,000*(1.04^10)
FV= $207,234.2
someone please help me omg i am so lost and this is due tonight
Answers
Answer:
45
Step-by-step explanation:
105+30 = 135
180-135= 45
:')
If you get 9 = 0 as your final answer, how many solutions do you have in your set?
A) one solution
B) infinite solutions
C) no solution
D) two solutions
Answers
What is the mean of the data set
Answers
Answer:
12.5 if all the numbers are one set. 15.3 for first row and 10 for last row if they are separate
Step-by-step explanation:
mean is found by adding all the data from the set and then dividing by how many data's there are. Mean can also be called the average of a set of data.
Find the volume, V, of a right circular cylinder in terms of π, if its height is 5 yards, and the radius of its base is 2 yards.
Answers
Answer:
The answer is 20
Answer:
20 on edge 2023
Step-by-step explanation: