8
If u =
11i + 7j, v= -7i+ 11j find the dot product of u and v?
Answers
Let's solve for v.
v=−7i+11
Answer:v=−7i+11
Step-by-step explanation: Hope you understand. Hope this help :)
Let's simplify step-by-step.
11i+7j
There are no like terms.
Answer:=11i+7j
Related Questions
Which equation has solution x = -3? *
2x - 7 = -1
3x + 8 = 1
1/2x + 8 = 10
1/2(2x - 6) = -6
Please help me
Answers
Answer:
1/2(2x-6)= -6
Step-by-step explanation:
Multiply the two sides by the equation 2
2x-6=12
move the constant to the right hand side change sign
2x = -12 + 6
calculate the sum
2x= -6
Divide the 2 sides by 2
x= -3
Find the sum of the first 6 terms of the following series, to the nearest integer.
180, 30, 5, ...
Answers
Answer:
Step-by-step explanation:
First solve for the common ratio:
[tex]\frac{30}{180} = \frac{1}{6} 6 \\ \\\frac{5}{30} = \frac{1}{6}[/tex]
Use the geometric summation equation to solve for sum:
[tex]a(\frac{(1-r^{n} )}{(1-r)})\\180(\frac{(1-\frac{1}{6} ^{6}) }{(1-\frac{1}{6} )}) = \frac{46655}{216} = 216[/tex]
The sum of the first 6 terms of the following series is 540.
What is the geometric series?A geometric series is the sum of an infinite number of terms that have a constant ratio between successive terms.
The sum of the terms of the geometric sequnece is given by;
[tex]\rm S_n=\dfrac{a(1-r^n)}{1-r}[/tex]
The common ratio of the sequence is;
[tex]\rm \dfrac{a_2}{a_1}=\dfrac{30}{180}=\dfrac{1}{6}\\\\ \dfrac{a_2}{a_1}=\dfrac{5}{30}=\dfrac{1}{6}\\\\[/tex]
The sum of the first 6 terms of the following series is;
[tex]\rm S_n=\dfrac{a(1-r^n)}{1-r}\\\\\rm S_6=\dfrac{180(1-1/6^6)}{1-1/6}\\\\ S_6=\dfrac{180\times 0.99}{5/6}\\\\S_6=\dfrac{180\times 0.99}{0.33}\\\\S_6=\dfrac{178.2}{0.33}\\\\S_6=540\\[/tex]
Hence, the sum of the first 6 terms of the following series is 540.
Learn more about geometric sequence here;
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What is the exact distance from (−4, −2) to (4, 6)?
square root of 24. units
square root of 88. units
square root of 100. units
square root of 128. units
35 points!!
Answers
Answer:
Arf ( its 128 units)
Step-by-step explanation:
Choose the letter of the point which is at (3.5, 3.5) in the following figure.
Answers
3.5 across, 3.5 up
what is quarter to twelve on the 24 hour clock
Answers
Answer:
11:45
Step-by-step explanation:
12 am 6om 60 A 180 cm B) 160 cm C 200 cm D 240 cm? ~PLEASE RESPOND AND LOOK AT PIC~
Answers
PLEASE HELP HURRY 20 POINTS AND I WILL MARK BRAINLEST
Justin’s pay is represented by this line graph.
How much is Justin paid for one hour of work?
Answers
OMG!!! Help MEH 20 PIONTS AND CROWN I REALLY NEED HELP :'( I NEED MY GRADE UP EVERYTHINGS BELOW
Answers
Answer:
Question 3: There are two sets of like terms. The first one is 4 and -2. The second one is -4z, 5z and 2z. When you combine them the answer is 2+3z.
Question 2: -24-3x
Answer: Hope This Helps <3
Step-by-step explanation:
Question 1: 2+3z
Question 2: -24-3x
Hope your grades get better <3
Hurrrry
Djdbdidbdudhhebfjfnifnf
Answers
Answer:
I don't know that answer will come back to you
Tickets for a carnival for a family of 4 costs $28. The ticket includes 1 food item and 3 games.
Select all true statements below based on this information.
A The cost for 2 tickets is $20. The cost for 2 tickets is $20.
B The cost is $7 per ticketThe cost is $7 per ticket
C For $42 you could get 6 tickets. For $42 you could get 6 tickets.
D 12 tickets would cost you $60
Answers
Answer:
B
Step-by-step explanation:
28/4=7 therefore, each ticket is $7.
Answer:
B, C
Step-by-step explanation:
A is wrong due to the fact that if you divide $28 into 4 (family of 4), the cost is $7 per ticket. If you add 2 tickets together, or multiply $7 by 2, you get $14.
B is right due to the fact that each ticket is $7 if you divide $28 by 4.
C is right due to the fact that if you have 6 tickets worth $7 each, it would mean that the total cost of 6 tickets would be $42. (6*7 = 42)
D is wrong due to the fact that if you multiply 7 (the cost of each ticket) by 12, it gets you 84, not 60.
3 in. 6 in. 5 in. Find the surface area of the shape above, A 14 in 2 B 56 in? C 90 in? D 126 in
Answers
Answer:
C) 90in
Step-by-step explanation:
3 x 6 x 5 = 90
what is the mixed number: 1 and 3/4 as a percent
Answers
Answer:
175%
Step-by-step explanation:
1 would be 100%
3/4 would be 75%
100%+75%=175%
4(g - h) + 10 , when g = 12 , h = 7
Answers
Answer: 30
Step-by-step explanation:
4 (12 - 7 ) + 10
Do 12 - 7 first. It'll equal 5
4(5)+10
Now multiply 4 and 5.
It'll be 20.
20+10 =30
Answer:
30
Step-by-step explanation:
4(12-7)+10 or: 4(12-7)+10
48-28+10 4(5)+10
20+10 20+10
30 30
you can do it either way hope this helps
SOMEBODY PLEASE HELP ME THIS IS A TEST QUESTION.The population of bacteria doubles every hour. At 9 AM. The population is 12 bacteria. The function P (t)=12•2^t models the bacteria population tea hours after 9 AM what is the value of P (5) what does it represent in context
Answers
Answer:
The population is 384 bacteria at 2pm
Step-by-step explanation:
Because u just need multiplied
For males in a certain town, the systolic blood pressure is normally distributed with a mean of 110 and a standard deviation of 10. What percentage of males in the town that have a systolic blood pressure between 113 and 134, to the nearest tenth?
Answers
Answer:
37.4
Step-by-step explanation:
What is a scale model of a project?
Answers
Answer: A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size.
write your answer (168 ÷ 7) × 3^2 - 43
Answers
Answer:
173
Step-by-step explanation:
Answer:
173
Step-by-step explanation:
True or false. The GCF of 6 and 12 is 2?
Answers
Find the value of x.
110
80
40
35
Answers
Answer:40
Step-by-step explanation:
Find the mean absolute deviation (MAD) of the following data set. Round your answer to two decimal places.
3, 10, 6, 9, 7, 4
Answers
Answer:The mean absolute deviation (MAD) of the data set=2.17
Step-by-step explanation:
The mean absolute deviation (MAD) is also called the Mean deviation which tells us the variation and average distance of the mean and each data value in a data set.
Given the data set
3, 10, 6, 9, 7, 4
First find the mean
Mean =Sum of data set / Number of data set
=3+10+ 6 +9 + 7+ 4/ 6 =39/6 = 6.5
Next step is to subtract each data set from the mean and ignoring any negative sign accompanied to find the distance from the mean
Value distance from mean
3, 6.5 -3 3.5
10 6.5 -10 3.5
6, 6.5-6 0.5
9, 6.5 -9 2.5
7, 6.5 -7 0.5
4 6.5 -4 2. 5
Last step is to find the mean of the distances which is
Mean Deviation = (3.5+ 3.5+ 0.5+ 2.5+0.5+ 2.5) / 6
=13/6
=2.166666 rounded up to 2.17
hey besties first to answer gets brainliest bc i forgot how to calculate triangles
Answers
A radio station tower was built in two sections. From a point that is 70 feet from the base of the tower, the angle of elevation to the top of the section is 28 degrees, and the angle of elevation to the top of the second section is 40 degrees. What is the height of the top section of the tower to the nearest tenth of a foot?
Answers
Answer:
21.5 feet
Step-by-step explanation:
d = Distance of the bottom of the tower to the point of observation
x = Height of the top section of the tower
a = Height of bottom section
b = Total height of tower
[tex]\tan28^{\circ}=\dfrac{a}{d}\\\Rightarrow a=d\tan28^{\circ}\\\Rightarrow a=70\tan28^{\circ}[/tex]
[tex]\tan40^{\circ}=\dfrac{b}{d}\\\Rightarrow b=d\tan40^{\circ}\\\Rightarrow b=70\tan40^{\circ}[/tex]
[tex]x=b-a\\\Rightarrow x=70\tan40^{\circ}-70\tan28^{\circ}\\\Rightarrow x=70(\tan40^{\circ}-\tan28^{\circ})\\\Rightarrow x=21.5\ \text{feet}[/tex]
The height of the top section of the tower is 21.5 feet.
Solve this PLZZZZZZ
Answers
Answer:
X = -1, 3
Step-by-step explanation:
Three subtracted from x is greater than -25.
Answers
if the question is asking what is X then the answer is
X - 3 >-25
X >-25+3
X >-22
-7=-0.2k
K=
Please help!
Answers
Answer:
Your answer should be 35 :)
Step-by-step explanation:
Hope this helps!
35
Solution:
-0.2k=-7 then divide both sides by -0.2
plsss help i need a good grade
Answers
Answer:
Step-by-step explanation:
PLEASEEE HELP!
The conservation club coordinator is recruiting volunteers to help build a shed for recycling. She knows that finishing the shed will take 120 work hours. She figures out that if she can find one more person to help, the project will take a half hour less per volunteer. How many volunteers have already signed up?
Answers
Answer:
4
Step-by-step explanation:
120/30=4
12 volunteers already signed up.
What is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
We have,
She knows that finishing the shed will take 120 work hours.
let n be the number of volunteers.
So, 1/n - 1/(n+1)= 1/120
(n+1-n)/n(n+1)= 1/120
1/n²-n = 1/120
n² - n= 120
n² - n -120= 0
n= 11.46 and n= -10.46
Thus, 12 volunteers already signed up.
Learn more about Algebra here:
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Find the dimensions of the square or circle.
Answers
Complete question is;
Find the dimensions or, the square or circle. Area = 64π in²
Answer:
r = 8 inches
Step-by-step explanation:
We know that formula for area of a circle is; A = πr²
Where r is radius.
We are given Area as 64π in²
Thus;
πr² = 64π
π will cancel out to give;
r² = 64
r = √64
r = 8 inches
math easy question?
pls help
Answers
because she should substitute the negative sign to 6
Karma's sock drawer has 8 striped socks, 4 polka dot socks, 6 fuzzy socks, and 2 socks with holes. What is the probability that she randomly chooses a sock with holes on her first grab, returns it to the drawer and picks another sock with holes in it?
Answers
Answer:
quite low, but not impossable.
Step-by-step explanation: