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2 years ago

Please help with these math questions I really need it ! Don't just do it for points pls

Mathematics

2 answers:

Molodets [167]2 years ago

5 0

Answer:

1. d 2. 43.5 3. 817.5

Step-by-step explanation:

steposvetlana [31]2 years ago

3 0

Answer:

wouldn't that be 81 but i dont know

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The value of 0.01 gramis equivlent to

Art [367]

Answer:

10 milligrams

Step-by-step explanation:

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2 years ago

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An investigator wants to estimate caffeine consumption in high school students. how many students would be required to estimate

astraxan [27]

We can solve this problem by referring to the standard probability distribution tables for z.

We are required to find for the number of samples given the proportion (P = 5% = 0.05) and confidence level of 95%. This would give a value of z equivalent to:

z = 1.96

Since the problem states that it should be within the true proportion then p = 0.5

Now we can find for the sample size using the formula:

n = (z^2) p q /E^2

where,

p = 0.5

q = 1 – p = 0.5

E = estimate of 5% = 0.05

Substituting:

n = (1.96^2) 0.5 * 0.5 / 0.05^2

n = 384.16

Around 385students are required.

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2 years ago

Find the discount and the selling price, when: (ii) the printed price =₹12750, discount= 25/3%

vodomira [7]

Answer:

12,741.66666

Step-by-step explanation:

12750 - 25/3%

= 12,741.66666

3 0

2 years ago

I am having trouble 2(10-13x)=-34x+60

Elis [28]

x = 5 i beliavie :)..............................

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2 years ago

Construct parallelogram PQRS with |PQ|=10cm, |ps|=8cm and <QPS = 120

IgorC [24]

Find sketch of parallelogram attached

Answer and explanation:

A parallelogram is a quadrilateral which is wider than it is long. A parallelogram has two sides parallel to the other. From the above, we are told the parallelogram PQRS has an angle QPS 120, with sides 10cm and 8cm, we use this to sketch the parallelogram

We find that angle QPS is 120 degrees hence angle RSP is 60 degrees since angle on straight line is 60 degrees from 180-120 in angle QPS and alternate angles are equal. Also opposite angles of a parallelogram are equal

4 0

2 years ago