We have the following vectors:
u = (a, b)
v = (c, d)
We observe that the vectors form an angle of 90 degrees.
Therefore, the product u.v is equal to zero.
We have then:
u.v = (a, b). (c, d) = 0
u.v = ac + bd = 0
ac = -bd
Answer:
B) ac = -bd
Answer:
Tip of $1.60
The total is $9.60
Step-by-step explanation:
(20% × $8) + $8
$1.60 + $8
$9.60
1. The data are
<span>75, 38, 43, 120, 65, 48, 52
Adding them and dividing by the number of data gives the mean which is 63.
Arranging them from lowest to highest and taking the middle data gives the median which is 52.
Since no data is repeated, this means that there is no mode.
The answer is
</span><span>D) mean: 63, median: 52, no mode
2.The answer is
A) mean
3. The realistic data to represent the weight of books is
A) mean </span>
Answer: 20 questions
Step-by-step explanation:
From the question, Noah is taking an online survey and after answering 16 questions, he gets a message that he has completed 80% of the survey.
To get the total number of questions in the survey goes thus:
Let the total number of questions be y.
80% of y = 16
80/100 × y = 16
0.8 × y = 16
0.8y = 16
Divide both side by 0.8
y = 16/0.8
y = 20
The survey has 20 questions.
Answer:
step 2:do subtraction in the parentheses
Step 3: distribute
Step 4: add
Step-by-step explanation:
