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Sidana [21]
3 years ago
11

How do I work this out

Mathematics
1 answer:
gregori [183]3 years ago
4 0
P = a + b + c where a < b < c

P = 42 in
b = 18 in
a = x
c = 4x - 1

The equation:

x + 18 + 4x - 1 = 42    |combine items

5x + 17 = 42      |subtract 17 from both sides

5x = 25    |divide both sides by 5

x = 5 (in)

c = 4 · 5 - 1 = 20 - 1 = 19 (in)

Answer: The length of the longest side is 19 in.
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Researchers have concluded that a dry basin began to fill with water in 1880. the water level rose an average of 1.6 millimeters
docker41 [41]

Answer:

  1. the domain is [0,129]
  2. 112 mm
  3. 1942

Step-by-step explanation:

1. The function is good for years 1880 to 2009, 0 to 129 years after 1880. Values of x can be anything in the domain [0, 129].

__

2. 1950 -1880 = 70. The year 1950 corresponds to x=70, so the function tells us the water level rose ...

  f(70) = 1.6·70 = 112 . . . . . mm

__

3. We want to find x when f(x) = 100. That will be the solution to ...

  100 = 1.6x

  100/1.6 = x = 62.5

Then 62.5 years after 1880 is year 1942.5. The water level was 100 mm higher than in 1880 in the year 1942.

3 0
2 years ago
A tree is 3,212 years old how can you express this age in scientific notation with the lowest level of precision
AfilCa [17]
3x10^3 I believe that’s the answer
8 0
2 years ago
Read 2 more answers
Acellus
marishachu [46]

Answer: (0, 3)

Step-by-step explanation:

7 0
2 years ago
3)<br> Evaluate the expression 2x-5 when x = 3.
Shalnov [3]

Answer:

1

Step-by-step explanation:

Plug in the x to the original equation given.

2(3)-5

2 times 3 is 6 so then,

6-5 =1

4 0
2 years ago
Find the product. Estimate to check if the answer is reasonable.
elena-14-01-66 [18.8K]
The answers you are looking for are:
A.) 199580
B.) 114002 
C.) 48042 
D.) 5828
E.) 18510 
Hope that helps!!
Have a wonderful day!!
5 0
3 years ago
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