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WITCHER [35]
3 years ago
8

What must an observer use in order to make observations

Mathematics
1 answer:
dexar [7]3 years ago
3 0
Well the definition of observer is a person who watches or notices something the definition of observation is the action or process of observing something or someone carefully or in order to gain information or a remark, statement, or comment based on something one has seen, heard, or noticed so from my conclusion the answer is their eyes
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You bike 1 mile the first day of your​ training, 1.3 miles the second​ day, 1.9 miles the third​ day, and 3.1 miles the fourth d
JulsSmile [24]

Answer:

19.9 miles

Step-by-step explanation:

In this problem we have:

d_1=1 mi is the distance travelled during the 1st day

d_2=1.3 mi is the distance travelled during the 2nd day

d_3=1.9 mi is the distance travelled during the 3rd day

d_4=3.1 mi is the distance travelled during the 4th day

We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:

d_2-d_1=0.3\\d_3-d_2=2\cdot 0.3 = 0.6\\d_4-d_3=2\cdot 0.6 = 1.2

Which can be rewritten using the general formula:

d_{n+1}-d_n=2(d_n-d_{n-1})

This means that

d_{n+1}=d_n+2(d_n-d_{n-1})

By applying this formula recursively, we can find the 7th term, which is the distance travelled on the 7th day:

d_1=1\\d_2=1.3\\d_3=1.9\\d_4=3.1\\d_5=3.1+2\cdot 1.2=5.5\\d_6=5.5+2\cdot 2.4=10.3\\d_7=10.3+2\cdot 4.8=19.9 mi

So, the  distance travelled on the 7th day is 19.9 miles.

7 0
3 years ago
You have 3/6 cup of brown sugar in your cupboard. The recipe for a dessert
Dmitry_Shevchenko [17]
Already have: 3/6 cups
need : 1/5
3/6 - 1/5=
15/30 - 6/30=
9/30=
3/10

so you wil have 3/10 of brown sugar left
3 0
3 years ago
I need help i'll give u Brainliest<br> if u correct.
kifflom [539]

Answer:

30$ sales tax, 460$ Total

Step-by-step explanation:

7% of 430 is 30.1, after rounding it’s 30, and 430 plus 30 is 460.

You’re welcome

3 0
3 years ago
What is 6w =30;5,6,7 how is it to be solved?
Gennadij [26K]
6w=30; divide 30 by 6 to the w by itself; the answer is 5

3 0
3 years ago
Solve: (6x2 + 5x + 1) + (x + 2).
Mademuasel [1]

Answer:

6x+6x2+3

Step-by-step explanation:

6x2+5x+1+x+2

Combine 5x and x to get 6x.

6x2+6x+1+2

Add 1 and 2 to get 3.

6x2+6x+3

7 0
2 years ago
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