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salantis [7]
3 years ago
8

If 1 cost 9p find the cost of 100

Mathematics
1 answer:
damaskus [11]3 years ago
7 0
9p times 100 = 900p or £9
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According to astronomers, what is a "light year" answer key
liberstina [14]
A light-year is defined as the distance the light can cover in one year.

The light travels at speed of c=3 \cdot 10^8 m/s, and one year converted into seconds is
1 y = 365  \frac{d}{y} \cdot 24  \frac{h}{d} \cdot  60 \frac{m}{h} \cdot 60  \frac{s}{m}=3.15 \cdot 10^7 s

So the distance covered by the light in one year is
S=vt =(3 \cdot 10^8 m/s)(3.15 \cdot 10^7 s)=9.45 \cdot 10^{15} m
And this is the distance that corresponds to one light-year.
3 0
3 years ago
Please help!!!!!!!!!
ra1l [238]

Answer:

C

Step-by-step explanation:

4 0
3 years ago
The course grade in a statistics class is the average of the scores on five examinations. Suppose that a student's scores on the
nadya68 [22]

Answer:

84 is the highest possible course average

Step-by-step explanation:

Total number of examinations = 5

Average = sum of scores in each examination/total number of examinations

Let the score for the last examination be x.

Average = (66+78+94+83+x)/5 = y

5y = 321+x

x = 5y -321

If y = 6, x = 5×6 -321 =-291.the student cannot score -291

If y = 80, x = 5×80 -321 =79.he can still score higher

If If y = 84, x = 5×84 -321 =99.This would be the highest possible course average after the last examination.

If y= 100

The average cannot be 100 as student cannot score 179(maximum score is 100)

8 0
2 years ago
Solve 4x-2y=6 for x in terms for y
Elina [12.6K]

Answer:

x = 3 + y

Step-by-step explanation:

4x - 2y = 6

~Add 2y to both sides

2x = 6 + 2y

~Divide 2 to everything

x = 3 + y

Best of Luck!

5 0
2 years ago
A programmer wants to display how the shape of a rectangle with a fixed perimeter of 375 inches can be changed by varying the re
Nina [5.8K]

Answer:

A = 187.5L - L^2

So,

g(l) = 187.5l - l^2

Step-by-step explanation:

The perimeter of a rectangle is given by:

P = 2(L + B)

Where P = perimeter

L = Length

B = Width

Making B the subject of formula, we have;

B = P/2 - L ......1

The area of a rectangle is:

A = L × B ........2

Substituting equation 1 to 2.

A = L × (P/2 - L)

A = LP/2 - L^2 .......3

Given that the perimeter P = 375 inches

A = L(375)/2 - L^2

A = 187.5L - L^2

So,

g(l) = 187.5l - l^2

7 0
2 years ago
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