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3 years ago

Help me please if your good at maths

Mathematics

2 answers:

barxatty [35]3 years ago

3 0

Answer:

a) n+5

6, 7, 8, 9, ..., 15

b) 2n-1

1, 3, 5, 7, ..., 19

Lana71 [14]3 years ago

3 0

Answer:

a) n+5

6, 7, 8, 9, ... , 15

b) 2n-1

1, 3, 5, 7, ... , 19

Just add in the # of terms as n and plug it into the formula given.

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alukav5142 [94]

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3 years ago

Alabama papas must average 80 on five test . Scores on the first four test were 81 73 84 and 76 what is the lowest score she can

Salsk061 [2.6K]

She has to score at least 86 on her fifth test.

Further explanation:

We will use the average formula to find the fifth value.

Given

$Average\ required=80\\x_1=81\\x_2=73\\x_3=84\\x_4=76\\x_5=?$

We have to find x5

The formula for average is:

$x=\frac{Sum\ of\ values}{Total\ number\ of\ values}\\Here,\\n=5\\So,\\x=\frac{x_1+x_2+x_3+x_4+x_5}{5}\\Putting\ values\\80=\frac{81+73+84+76+x_5}{5}$

$80*5=314+x_5\\400=314+x_5\\x_5=400-314\\x_5=86$

She has to score at least 86 on her fifth test.

Keywords: Average, Word Problems

Learn more about average at:

#LearnwithBrainly

7 0

3 years ago

In triangle XYZ, m∠Z > m∠X + m∠Y. Which must be true about △XYZ?

MissTica

It must be an obtuse triangle

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3 years ago

Madison has lemons and papayas in a ratio of 3:22 how many papayas does she have if she has 12 lemons

Anna [14]

She would have 88 papayas if she had 12 lemons

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3 years ago

Write 4 3/7 as a decimal.

Citrus2011 [14]

Hi!

There are two ways to do this.

1. Start with the first part of the decimal, (4.) then divide 3/7 to get the second part.

3/7 = 0.43

4.43

2. Convert the mixed number 4 3/7 to a fraction.

4 x 7 = 28
28 + 3 = 31

31/7

Now convert that into a decimal.

31/7 = 4.43

The answer is 4.43

Hope this helps! :)

3 0

3 years ago

Read 2 more answers