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xxTIMURxx [149]
2 years ago
14

A geologist visits 90 volcanoes in Alaska and California​

Mathematics
1 answer:
Viktor [21]2 years ago
4 0

Answer:

40 volcanoes = 100% of them           15% were in California so if we want to know how much % were in Alaska we do 100% - 15% which equals 85%, so 85% were in Alaska.      Now to find out how many the geologist visited in each state multiply 40 by the percentage.       Number of volcanoes in California = 15% of 40 volcanoes = 0.15 x 40 = 6Number of volcanoes in Alaska = 85% of 40 volcanoes 0.85 x 40 = 34

Step-by-step explanation:

You might be interested in
Which equation can be used to solve x/8 = 5? (ANSWER AND YOU GET 50 POINTS)
Ray Of Light [21]

Answer:

<h3>A. x=5*8</h3>

Step-by-step explanation:

Isolate the term of x from one side of the equation.

\sf{\dfrac{x}{8}=5 }

<u>First, you have to multiply by 8 from both sides.</u>

\Longrightarrow: \sf{\dfrac{8x}{8}=5*8 }

<u />

<u>Solve.</u>

<u />

<u>Multiply the numbers from left to right.</u>

5*8=40

\Longrightarrow: \boxed{\sf{x=40}}

<u>Therefore, the correct answer is "A. x=5*8".</u>

I hope this helps. Let me know if you have any questions.

7 0
2 years ago
(2 + i)(3 - i)(1 + 2i)(1 - i)(3 + i)
anygoal [31]

Answer:

<h2>50+50i</h2>

Step-by-step explanation:

Given the expression (2 + i)(3 - i)(1 + 2i)(1 - i)(3 + i), we are to take the product of all the complex values. We must note that i² = -1.

Rearranging the expression [(3 - i)(3 + i)] [(2 + i)(1 - i)](1 + 2i)

On expansion

(3 - i)(3 + i)

=  9+3i-3i-i²

= 9-(-1)

= 9+1

(3 - i)(3 + i) = 10

For the expression (2 + i)(1 - i), we have;

(2 + i)(1 - i)

= 2-2i+i-i²

= 2-i+1

= 3-i

Multiplying 3-i with the last expression (1 + 2i)

(2 + i)(1 - i)(1 + 2i)

= (3-i)(1+2i)

= 3+6i-i-2i²

= 3+5i-2(-1)

= 3+5i+2

= 5+5i

Finally,  [(3 - i)(3 + i)] [(2 + i)(1 - i)(1 + 2i)]

= 10(5+5i)

= 50+50i

Hence,  (3 - i)(3 + i)(2 + i)(1 - i)(1 + 2i) is equivalent to 50+50i

5 0
3 years ago
She put out two more recovery tests smh
Umnica [9.8K]

Answer:

C - 8

Step-by-step explanation:

4 0
3 years ago
I need help with this thanks
Elina [12.6K]

Answer:

n ÷ 2

Step-by-step explanation:

if you insert a 12 for 'n', the corresponding value below would be 12÷2, or 6

this follows the pattern in the table

7 0
3 years ago
Show the region which satisfies simultaneously the inequalities 2x+3y≤8, x-2y≥-3, x≥0, y≥0
Verizon [17]
The first thing you should do is graph the following lines
 2x + 3y = 8
 x-2y = -3
 x = 0
 y = 0
 After you have graphed them, you should proceed to evaluate points in the xy plane that meet the following restrictions:
 2x + 3y≤8, x-2y≥-3, x≥0, y≥0
 The resulting region is the region "R" shown in the attached graph.

8 0
3 years ago
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