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kondaur [170]
3 years ago
9

Math Middle School Question

Mathematics
2 answers:
Alenkinab [10]3 years ago
4 0
You have to add the according numbers bcoz the a and b are just adding up
3+6 9
Anarel [89]3 years ago
3 0

Answer:

9  and 14

Step-by-step explanation:

add the numbers on each side

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Zepler [3.9K]
Abdc

I think so cuz I did this and got it right hopefully it is right good luck
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There were 60 points on Tom's first math test. He scored 75% of the points. How many points did Tom earn? a 60 b 45 c 15 d 50
Lana71 [14]
Multiply 60 by .75, which gives you 45 Points. The answer is B.
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WILL GIVE BRAINLIEST TO BEST ANSWER! HELP ASAP!
Aleks [24]

Answer:

120 ft

Step-by-step explanation:

The distance the gravel covers is the total distance times the percentage that the gravel covers

We know the gravel covers 66 ft and the percentage is 55%

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8 0
3 years ago
A researcher wants to see if birds that build larger nests lay larger eggs. He selects two random samples of nests: one of small
True [87]

Answer:

95% confidence interval for the difference between the average mass of eggs in small and large nest is between a lower limit of 0.81 and an upper limit of 2.39.

Step-by-step explanation:

Confidence interval is given by mean +/- margin of error (E)

Eggs from small nest

Sample size (n1) = 60

Mean = 37.2

Sample variance = 24.7

Eggs from large nest

Sample size (n2) = 159

Mean = 35.6

Sample variance = 39

Pooled variance = [(60-1)24.7 + (159-1)39] ÷ (60+159-2) = 7619.3 ÷ 217 = 35.11

Standard deviation = sqrt(pooled variance) = sqrt(35.11) = 5.93

Difference in mean = 37.2 - 35.6 = 1.6

Degree of freedom = n1+n2 - 2 = 60+159-2 = 217

Confidence level = 95%

Critical value (t) corresponding to 217 degrees of freedom and 95% confidence level is 1.97132

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Lower limit = mean - E = 1.6 - 0.79 = 0.81

Upper limit = mean + E = 1.6 + 0.79 = 2.39

95% confidence interval for the difference in average mass is (0.81, 2.39)

3 0
2 years ago
If 4 is 1/4 what is the whole
nevsk [136]

Answer:16/1

Step-by-step explanation:

5 0
3 years ago
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