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anzhelika [568]
3 years ago
11

Please + brainliesting.

Mathematics
1 answer:
gogolik [260]3 years ago
6 0

Answer:

a) 0.3125

b) 45

Step-by-step explanation:

Remark

5 students own a smart phone

11 do not.

Part A

The probability of owning a smart phone is 5/16. Where did the 16 come from.? You must use a total for the sample. You can't choose someone without a smart phone and figure out the probability of doing that if you use 11  in the denominator.

So the answer is 5/16 = 0.3125

Part B

You have to set up a proportion for this.

x / 144 = 5/16  

Notice where the 144 goes. It is across from 16. Both of them represent the total number of students. Multiply both sides by 144

x * 144 / 144 = 5 * 144/16

x = 720 / 16

x = 45

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Given :

A meat market sells fajitas for $5.12 per  pound.

To Find :

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Solution :

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6 0
3 years ago
If the angles of a triangle are in the ratio 3:4:2 find the value of all triangle​
Nata [24]

Answer:

Step-by-step explanation:

If the ratio of triangle = 3:4:2

Total ratio = 3+4+2 = 9

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2nd angle= 4/9 × 180 = 4 × 20 = 80°

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6 0
3 years ago
The density of a certain material is such that it weighs 9 kilograms for every 7 cubic feet of volume. Express this density in p
Vadim26 [7]

Answer:

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Step-by-step explanation:

Density= mass / volume

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Density= 9/7= 1.286 kg/ ft^3

Density= 1.286 kg/ ft^3

To Convert to pounds per inch

1 kg/ ft^3 = 0.00128 pound / cubic inch

1.286 kg/ ft^3 = X pounds/ cubic inch

X=( 1.286 × 0.00128)

= 0.0016407087 pounds/ cubic inch

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Hence,this density in pounds per inch is 1.641× 10^-3 pounds/ cubic inch

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Step-by-step explanation:

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