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Svetlanka [38]
3 years ago
11

Help this is worth 20 points!!

Mathematics
1 answer:
My name is Ann [436]3 years ago
3 0
It takes 59 earth days to rotate and 88 earth days to fully orbit the sun
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If three times a number minus 2 equals 13, what is the number?
Nana76 [90]
Change the messy words into numerals
3     times          a number         minus            2           equals         13
3          ×                n                     -                 2               =               13

3n - 2 = 13
take 2 to the other side
3n - 2 + (2)  = 13 + (2)
3n = 15

Divide by 3 on either sides to isolate n
\frac{3n}{3} = \frac{15}{3}
3 and 3 cancels out

n = 5

check:
3 times 5 minus 2 equals 13
3     ×    5       -      2     =     13
15    -      2        =          13
13            =               13

The number is 5
3 0
3 years ago
Dave, Frida, Natalie, and Robbie have four adjacent seats at a baseball park. They randomly chose an order to sit in. Make a lis
Novosadov [1.4K]
The sample space (list of outcomes) is:
DFNR; DFRN; DRFN; DRNF; DNFR; DNRF;
NFDR; NFRD; NRFD; NRDF; NDRF; NDFR;
RFDN; RFND; RNFD; RNDF; RDFN; RDNF;
FRDN; FRND; FNRD; FNDR; FDRN; FDNR

P(Dave beside Natalie) = 1/2
P(B,G,B,G or G,B,G,B) = 1/3
P(boys in the middle) = 1/6
P(Frida beside Natalie) = 1/2
P(Robbie between Frida & Natalie) = 1/6
P(Natalie between Dave & Robbie) = 1/6

Explanation
Letting D=Dave, R=Robbie, N=Natalie, and F=Frida you get the list of possibilites above.

For P(Dave beside Natalie), look for DN or ND.  This appears 12 times out of the 24 possibilities above; 12/24 = 1/2.

For P(B,G,B,G or G,B,G,B), we have the possibilities DFRN, DNRF, RFDN, RNDF, FRND, FDNR, NDFR, NRFD.  There are 8 possibilites out of 24; 8/24 = 1/3.

For P(Frida beside Natalie), look for NF or FN.  This appears 12 times out of the 24 possibilities; 12/24 = 1/2.

For Robbie between Frida and Natalie, look for FRN or NRF.  This appears 4 times out of 24; 4/24 = 1/6.

For Natalie between Robbie and Dave, look for RND or DNR.  This appears 4 times out of 24; 4/24 = 1/6.
7 0
3 years ago
Evaluate 1/3 multiplied by 2/5
masya89 [10]

Answer: 2/15

Step-by-step explanation:

1/3 x 2/5 = 2/15

3 0
3 years ago
Read 2 more answers
The L-shaped room shown is to be carpeted with carpet that costs $3.89 per square foot. What will be the cost of the carpet?
serg [7]

Answer:

I think C but then again I could be wrong.

7 0
3 years ago
Give at least five (5) examples of statistical and non-statistical questions.
Anit [1.1K]

Answer (statistical):

1. How old are the students in this room?

2. What do 7th graders prefer to eat for lunch?

3.  What time did the students in this class get up this morning?

4. What is the typical amount of pets owned by students in my class?

5.  What were the high temperatures in all of the Latin American capitals today?

Answer (non-statistical):

1. What did Tom eat for lunch?

2. How old are you?

3. How many brothers does Marley have?

4. Did you get up on time today?

5.  How many votes did the winning candidate for the Student Body receive this year?

7 0
2 years ago
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