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ki77a [65]
4 years ago
5

Help! i really need this

Mathematics
1 answer:
svp [43]4 years ago
8 0

Answer:

9.6 or 48/5

Step-by-step explanation:

I divided 12 by 5, then multiplied the result by 4.

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on a remote controlled racing track, car a completes a lap every 15 seconds and car B compeletes a lap every 12 seconds. if they
Sidana [21]
I may not help. But i believe it is something to do with the lowest common multiple between those 2 being 60
6 0
3 years ago
What is the absolute value of 2-9i
Deffense [45]

Answer:

so we get as,

let, y = 2 - 9i

so the absolute value is |y|

so we get as,

|y| = 2-9i

so the absolute value is  |y|

|y|=√ 2 to the 2nd power plus 9 to the second power

so we get as,

|y|=

√81+4=√85

so the value is √85

Example:

| − 2 − i | = √ 5

Explanation:

Absolute value of a complex number  a + i b  is written as  | a + i b |  and its value as  √a 2 + b 2 .  

Hence, absolute value of  − 2 − i  is  √ ( − 2 ) 2 + ( − 1 ) 2 = √ 4 + 1 = √ 5 .

Step-by-step explanation:

8 0
3 years ago
Find the LCD of Number 21 and 23.
Alina [70]
The LCD is basically the LCM of the denoenator so

to find LCM of exg 6 and 21, find factors and group
6=2 and 3 (one 2 and one 3)
21=3 and 7 (one 3 and one 7)
lcm=2 and 3 and 7 (include 6 and 21 in the number) (one 2 and one 3 and one 7)

LCM≈LCD
so
17.
denomenators are 2 and x^2
2=2
x^2=x times x
lcm=2 times x times x=2x^2


18.
denomenators are 6 and 9
6=2 and 3
9=3 and 3
LCM=2 times 3 times 3=18

19.
denomenators are z and 7z
z=z
7z=7 and z
lcm=7 times z=7z


20. 
denomenators are 5b and 7b^3c
5b=5 and b
7b^3c=7 times b times b times b times c
LCM=7 times 5 times b times b times b times c=7b^3c=7cb^3

21. denomenator=5 and x+2
5=5
x+2=x+2
LCM=5 times (x+2)=5(x+2)=5x+10


22. denomenators are ab and b^2c
ab=a time b
b^2c=b times b times c
LCM=a times b times b times c=ab^2c=acb^2

23. demonenators are m+n and m-n

m+n=m+n
m-n=m-n
LCM=(m+n)(m-n)=m^2-n^2


24.denoenators are k and k^2-2

k=k
k^2-2=k^2-2
LCM=k times (k^2-2)=k^3-2k
5 0
4 years ago
Read 2 more answers
Help me with this circle question
leva [86]

Answer:

50.265482457436 inches

Step-by-step explanation:

radius = 8 inches

C = 2×pi×r

= 2×pi×8

C = 50.265482457436 inches

4 0
3 years ago
For question 1 please look at the image below
docker41 [41]

Answer:

Step-by-step explanation:

a) Number of families having income between $ 20000 - $ 40000 = 100

b) Number of families having income less than $40000 = 100 + 40 = 140

6 0
3 years ago
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