Ask question

Ask question

All categories

Sergeeva-Olga [200]

4 years ago

6

I REALLY NEED HELP FAST

1 answer:

amm18124 years ago

4 0

The scores are,
(7.5, 8, 6, 8.5, 7,7.5,7)
Removing the highest (8.5) and the lowest (6), we have
(7.5,8.0,7.0,7.5,7.0)
with a total of 37.
Final score is 77.7
Let the degree of difficulty be x.
According to the rules, the total remaining scores (37) multiplied by the degree of difficulty (x) equals final score (77.7), =>
37x=77.7
solve for x to get
x=77.7/37=2.1
So the degree of difficulty is 2.1

You might be interested in

Factor <br> (3c–5)^2–16c^2

melisa1 [442]

Here is your answer

${(3c - 5)}^{2} - {16c}^{2}$

$= {(3c - 5)}^{2} - {(4c)}^{2}$

$using \: identity \\ {a}^{2} - {b}^{2} = (a + b)(a - b)$

$(3c - 5 + 4c)(3c - 5 - 4c)$

$(7c - 5)( - c - 5)$

HOPE IT IS USEFUL

4 0

3 years ago

8 to the power of x =2<br> x = ?

natta225 [31]

4 is the answer to the problem

7 0

3 years ago

Melvin walked 5/8 mile to the library. He then walked 3/10 mile from the library to the store. About how far did Melvin walk?

zalisa [80]

Answer:

37/40 = 0.925 miles

Step-by-step explanation:

The total distance Melvin walked (in miles) was ...

5/8 + 3/10 = 25/40 + 12/40 = 37/40 . . . . miles

__

In decimal, the sum is ...

0.625 + 0.30 = 0.925 . . . . miles

8 0

3 years ago

The following is an arithmetic sequence that has 10 numbers LaTeX: 1,\ a_2, \ a_3, \ a_4, \ \cdots,\ a_{10}.1 , a 2 , a 3 , a 4

Naddika [18.5K]

Answer:

$a_2=3$

Step-by-step explanation:

The arithmetic sequence is given as: $1,\ a_2, \ a_3, \ a_4, \ \cdots,\ a_{10}$

We are told that the 10 numbers add up to 100.

$S_n=\frac{n}{2}(a_1+l)\\ $Where: \\n=number of terms\\l=last term\\a_1$=first term$

$S_{10}=100\\100=\dfrac{10}{2}(1+l)\\100=5(1+l)\\$Divide both sides by 5$\\20=1+l\\$Last term, $l=20-1=19$

We know that the nth term of an arithmetic sequence

$l=a_1+(n-1)d\\19=1+(10-1)d\\19=1+9d\\9d=19-1\\9d=18\\d=2$

Therefore, the second number

$a_2=a_1+2\\=1+2\\a_2=3$

3 0

4 years ago

A plumber charges a $25 service fee and $50 per hour. If

Feliz [49]

Answer: 75< x

Step-by-step explanation:

3 0

3 years ago