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vagabundo [1.1K]
3 years ago
8

Kaydeen is long jumper whose personal best is 6m. Her personal best jump is 20% greater than the school's championship record.

Mathematics
1 answer:
alisha [4.7K]3 years ago
5 0

Answer:

The school's championship record is 5 m

Kaydeen must increase her personal best by 25%

Step-by-step explanation:

Find the school's championship record by dividing 6 by 1.2

6/1.2

= 5

So, the school's championship record is 5 m

Find the percentage that she has to increase her personal best to equal the national record, by finding the percent change

Divide the difference in the scores by Kaydeen's score

1.5/6

= 0.25

So, Kaydeen must increase her personal best by 25%

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What is the 3rd quartile in the following data set? You may want to draw a box & whisker plot
Aliun [14]

Answer:

16

Step-by-step explanation:

Arrange date in order

3,5,8,12,15,16,20

find median  in this case its 12 also khown as 2nd quartile know  find the themedian of data that is on the right right of median or 2nd Quartiles  That will be the 3rd quartile...

5 0
3 years ago
Emily is trying to rewrite 45 - 27 as the product of the GCF of the two numbers and
Karolina [17]
No, it won’t work. The greatest common factor between 45 and 27 is 9, but 45-27=18. So it cannot work.
3 0
3 years ago
A brick of mass 4 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is t
Zielflug [23.3K]

Answer:

Step-by-step explanation:

In this system we have the force of the spring and the gravitational force. The equation that describes that is

F_{s}+F{g}=ma\\k(y_0+y)-mg=ma

where y0 is the equilibrium position when the string is free and y0+y is the new equilibrium position when the object is hanged of the string. By replacing by derivatives we have

ky_0+ky-mg=ma\\mg+ky-mg=ky=ma\\\\ky=m\frac{d^2y}{dt^2}\\\\my''+ky=0

the solution for this differential equation is (by using the characterisic polynomial)

y(x)=Acos(kt)+Bsin(kt)\\k=\omega^2m

hope this helps!!

7 0
4 years ago
Read 2 more answers
Help me please asap :(
GREYUIT [131]
This is a fairly tedious problem. The only way to solve that I see is to simply list out all the possible cases and go through each one by one. You'll use the triangle inequality theorem to see if the triangles can be formed. The theorem says that a+b > c must be true for all sets of pairs. In other words, take any two sides and add them up. The sum must be greater than the third side. 

Going through all the combos possible (that I could find), this is what I got
Blue9,Green7,Orange4
Blue9,Green7,Purple12
Blue9,Green7,Red3
Blue9,Green7,Yellow5
Blue9,Orange4,Purple12
Blue9,Purple12,Yellow5
Green7,Orange4,Yellow5
Green7,Red3,Yellow5
Orange4,Red3,Yellow5

In all, I count 9 cases. So the answer to problem 1 is 9.

-----------------------------------------------------------

For problem 2, the best way may be to pick two segments at a time instead of one. However, I have a feeling that will take just as long as the first method. I haven't tried it out. Even though going through the rods one at a time takes a while, it's probably the best option so you don't overlook any cases. 


6 0
4 years ago
Will give 30 points!<br> What is a expanded notation?
gavmur [86]

Answer:

It is the number written out to show each digit

Step-by-step explanation:

Let's say you have the number 459

you write out the hundredths place, which is 4 times 100

you write out the tenths place which is 5 times 10

and you write out the oneths place which is 9 times 1

the full thing written out is 459 = 100×4 + 5×10 + 9 × 1

4 0
3 years ago
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