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Fofino [41]
3 years ago
11

A manatee surfaced for air 6 times in 240 seconds. How many seconds went by before the manatee surfaced the fourth time if it he

ld its breath for the same rate?
Mathematics
1 answer:
Norma-Jean [14]3 years ago
3 0
I think it is 160 seconds
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slamgirl [31]

Answer:

A

Step-by-step explanation:

(5x4) - 6 / 2 = x

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Alexxandr [17]

Answer:

B

Step-by-step explanation:

3      -4    |   2

0      -1     |   7

3/2    -2    |   1

R1/3 ----> R1  (divide Row 1 by 3)

1       -4/3    |  2/3

0        -1      |   7

3/2      -2     |   1

R3 - 3/2  R1 -------> R3 (multiply Row 1 by 3/2 and subtract it from Row 3)

1      -4/3    |   2/3

0       -1      |    7

0       0      |    0

R2 / -1 -------> R2 (Divide Row 2 by -1)

1      -4/3   |  2/3

0        1     |   -7

0        0    |   0

R1 + 4/3 R2 --------> R1 (Multiply Row 2 by 4/3 and add it to Row 1)

1     0     |   -26/3

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3 years ago
Please provide a answer
Schach [20]

Answer:

uhh, look it up

Step-by-step explanation:

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HELP ASAP WILL GIVE BRAINLIEST! Angles A and B are supplementary. If
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90 degrees

Step-by-step explanation:

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At a gymnastics meet, three judges evaluate the balance beam performances of five gymnasts, using a scale from 1 to 10, where 10
Art [367]

Answer:

As   2.551 < 3.84 therefore we reject H0.

As 44.803 > 4.46 so we accept null hypothesis.

Step-by-step explanation:

The answer is attached.

There are three judges so v1 = 3-1= 2  and v2 = (4*2)= 8

There are five gymnasts so v1 = 5-1= 4 and v2=  (4*2)= 8

For alpha = 0.05 we find the value of F1 and F2 from the table.

Download docx
6 0
3 years ago
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