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4 years ago

Want Brainliest get this correct What is the sum of the fractions below?

Mathematics

1 answer:

Gennadij [26K]4 years ago

7 0

7/2x is ur answer since the denominator is the same so you just add the numerators together

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What is the next term in the pattern? 1, -1, 2, -2, 3,... 4 -4 3 -3

Alona [7]

Answer:

-3, 4, -4

Hope this helps :)

8 0

4 years ago

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At a local preschool, there is a ratio of three boys two every four girls. If there are 245 total preschoolers enrolled , Then h

White raven [17]

A ratio can be written in three different ways: 3 to 4, 3:4, and 3/4

What does this mean? It means that for every group of 7 students (3+4) there are 3 boys and 4 girls. And how many groups do we have? We have:

245/7= 35 We have 35 groups, and we just said that each group has 3 boys and 4 girls:

35*3= 105 boys

35*4= 140 girls

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5 0

3 years ago

In a quadrilateral each pair of opposite sides are equal. Is this quadrilateral a parallelogram? If yes, then prove you answer w

aalyn [17]

Yes, a parallelogram is a quadrilateral with 2 pairs of opposite, which both have equal sides.

4 0

4 years ago

Eight divided by three hundred forty four

adell [148]

your answer for 344 divided by 8 is 43

7 0

4 years ago

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The largest z-score available in most tables is 2.99, which corresponds to a probability of 99.86%. A fair coin is

lana66690 [7]

Answer:

The number of heads observed is 121.14 heads

Step-by-step explanation:

The formula for the z-score of a proportion is given as follows;

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{pq}{n}}}$

Where:

${\hat{p}$ = Sample proportion

p = Population success proportion = 0.5

q = 1 - p = 1 - 0.5 = 0.5

n = Number in of observation = 200

z = 2.99

Hence, we have;

$z=\dfrac{\hat{p}-0.5}{\sqrt{\dfrac{0.5 \times 0.5}{200}}} = 2.99$

Therefore;

${\hat{p}-0.5}{} = 2.99 \times \sqrt{\dfrac{0.5 \times 0.5}{200}} = 2.99 \times\dfrac{\sqrt{2} }{40}$

${\hat{p}$ = 0.6057

$Whereby \ \hat p = \dfrac{Number \ of \ heads}{Number \ of \ observation} = \dfrac{Number \ of \ heads}{200} = 0.6057$

∴ The number of heads observed = 200 × 0.6057 = 121.14 heads.

5 0

3 years ago