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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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Stefanie bought a package of pencils for $1.75 and some erasers that cost $0.25 each. She paid a total of $4.25 for these items,
melamori03 [73]

Answer:

Stefanie bought 10 erasers

Step-by-step explanation:

We can establish the following equation:

TP = NP*PP + NE*EP

Where:

TP = Total price; (4.25)

NP = Number of pencil packages; (1)

PP = Pencil Package's Price; (1.75)

NE = Number of erasers; (What we are looking for)

EP = Erasers Price; (0.25);

Then:

4.25 = 1*1.75 + NE*0.25;

4.25 - 1.75 = NE*0.25;

2.5/0.25 = NE;

10 = NE.

5 0
3 years ago
The two triangles are similar.
Andrei [34K]

Answer:

x=10

Step-by-step explanation:

The two triangles are similar since each triangle is the same shape of right triangle but different sizes. To find x, write a proportion between two equal ratios of side lengths.

\frac{28}{20}=\frac{4x+2}{3x}

Solve by cross multiplying.

28(3x) = 20(4x+2)

84x = 80x + 40

4x = 40

x=10

3 0
3 years ago
Read 2 more answers
What is 8+0= <br><br><br> • 8 <br> •0.8<br> •0.80<br> •0.80
Gemiola [76]

Answer:

8

Step-by-step explanation:

0 has no value what so ever when adding and subtracting.

6 0
3 years ago
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about 0.4 of a biology class will be going on a field trip. Express the decimal as a fraction in simplest form.
Illusion [34]
I believe you could also write 0.4 as 4/10
4 0
3 years ago
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Show how 12 people can share an eight segment chewy fruit worm. In each case how many segments does each person get.
Vesna [10]
They would all get 2 segments
4 0
3 years ago
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