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djverab [1.8K]
3 years ago
12

Someone please help I can't do this

Mathematics
2 answers:
Tju [1.3M]3 years ago
8 0
To find mean, add all of your given numbers, then divide by how many numbers you have in your data set.

87+93+86+90+84=440
440/5 (There are five numbers in your data set) is 88.

:)
VMariaS [17]3 years ago
7 0
Hey there, 

Mean, is the Sum of all values/their number

Which means 
(87 + 93 + 86 + 90 + 84)/5

Simplify
440/5

which equals 88
that's the mean 
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If a = 20 mm, b = 12 mm, and m∠C = 80°, what is the approximate area of ABC?
Lana71 [14]

Answer:

118.18 mm^2

Step-by-step explanation:

Sides <em>a</em> and <em>b</em> form angle C, so the information given is a side-angle-side (SAS) problem.

Use the formula A=\frac{1}{2}ab\sin{C}.

A=\frac{1}{2}(12)(20)\sin{80^\circ} \approx 118.18 \rm \,mm^2

8 0
3 years ago
Lily is going for a run. she runs at a speed of 4 miles per hour for 6.4
Nezavi [6.7K]

Answer:

She runs for 1.6 hours

Step-by-step explanation:

For this, one way to do it is to just set 1 hour over 4 miles equal to x hours for 6.4 miles. The reason this is done is because if the speed is constant that means the rate stays the same, which means the ratio of miles to hours should always be the same, so the two ratios must be equivalent.

1/4 = x/6.4

Multiply both sides by 6.4 to get x by itself:

6.4/4 = x

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Hope that helps!

4 0
4 years ago
Phone calls cost $7 for 3 minutes how many dollars per minute
Ilya [14]
7/3 divide up 7 dollars into 3 minutes by typing this into a calculator
3 0
3 years ago
There are 24 fish in an aquarium. If 1/8 of them are tetras, and 2/3 of the remaining fish are guppies, how many guppies are in
kiruha [24]

Answer:

14 guppies

Step-by-step explanation:

1/8th of 24 is 3 which leaves 21 remaining

2/3 of 21 is 14 as each third is 7

8 0
4 years ago
Two number cubes are rolled sequentially. What is the probability that the first number cube shows a Four and the second number
galben [10]

Answer:

\frac{1}{12}

Step-by-step explanation:

<h2>This is an independent event probability problem , that is the first event does not affect the occurrence of the second event.</h2>

The sample space of the first die is S1= {1,2,3,4,5,6}

The sample space of the second die is S2= {1,2,3,4,5,6}

1. the probability that the first number cube shows a Four  pr (4)= \frac{1}{6}

2. the probability that the second number cube shows an odd number=

odd numbers in the sample space are 1,3,5= 3

pr(odd) = \frac{3}{6} = \frac{1}{2}

For the two event to happen the probability is = \frac{1}{6}*\frac{1}{2}=\frac{1}{12}

4 0
3 years ago
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