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Dovator [93]
3 years ago
8

A student found a strong correlation between the age of people who run marathons and their marathon time. Can the student say th

at young people will run marathons faster than older people? Explain.​
Mathematics
1 answer:
DENIUS [597]3 years ago
7 0
Elite marathon race times improved from 5 to ~20 years, remained linear between ~20 and ~35 years, and started to increase at the age of ~35 years in a curvilinear manner with increasing age in both women and men. The sex difference in elite marathon race time increased non-linearly and was lowest at the age of ~49 years.
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There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls
Readme [11.4K]

Step-by-step explanation:

Boys

20 + (20 \div 100)30 = \\  = 20 + 0.2 \times 30  =   \\  = 20 + 6 = \\26

Girls

26 - (26 \div 100)15 = \\  = 26 - 0.26 \times 15 =  \\  = 26 - 3.9 = \\  = 22

Total last year 46

Total this year 48

Increase

5 0
3 years ago
Merlin Industries bought a laptop for $2,100. It is expected to depreciate at a rate of 14% per year. What will the value of the
bearhunter [10]

988

A year later will depreciate $294

The following year $253

On the third year $217

The fourth year. $187

And the 5th year. $161

5 0
3 years ago
Read 2 more answers
Ted is making a bread recipe that uses three 1/4 cups of flour and a muffin recipe that uses 2 3/4 cups of flour eggs. How much
wlad13 [49]

Amount of flour used in bread recipe = 3 \frac{1}{4} cups

Amount of flour used in muffin recipe = 2 \frac{3}{4} cups

We have to determine how much more flour is in the recipe.

Since, more amount of flour is used in bread recipe than in muffin recipe.

Total amount of more flour = 3 \frac{1}{4} - 2 \frac{3}{4}

= \frac{13}{4} - \frac{11}{4}

= \frac{2}{4}

= \frac{1}{2}

Therefore, \frac{1}{2} more cup of flour is used in bread recipe than in muffin recipe.

Now, we will determine the total amount of flour used in both recipe.

Total amount of flour used in bread and muffin recipe

= 3 \frac{1}{4} + 2 \frac{3}{4}

= \frac{13}{4} + \frac{11}{4}

=\frac{24}{4}

= 6 cups

Therefore, total 6 cups of flour are used in both the recipes.

3 0
3 years ago
True or false? About 10 1/2 million more people live in Cairo than in Washington DC?
mixas84 [53]
7.772 million people live in Cairo.
658,893 people live in Washington DC.
So it's false.
6 0
4 years ago
Read 2 more answers
PLS HELP I WILL AWARD BRANLIEST
sveticcg [70]

Answer:

x = 14

2x = 28

6x = 84

Step-by-step explanation:

6x = 180 - 124 + 2x

4x = 56

x = 14

7 0
3 years ago
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