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3 years ago

How do I solve pic rel? Online calculators keep saying the result is -1 but they don't show any steps which is confusing

Mathematics

2 answers:

Svetllana [295]3 years ago

7 0

Answer:

I also got -1 doing it on my calculator

Step-by-step explanation:

i first converted it to exponent form to get rid of the radical

(9 - 4(2)^1/2 )^1/2 - 2(2)^1/2 solve inside the first parenthsis

(9 - 4(1.414)^1/2 - 2(2)^1/2

(9 - 5.656)^1/2 - 2(2)^1/2 √2 times 4

(3.343)^1/2 - 2(2)^1/2 9 - √2 times 4

1.828 - 2(2)^1/2 √(9 - √2 times 4)

1.828 - 2(1.414) √(9 - √2 times 4) - 2√2

1.828 - 2.828 √(9 - √2 times 4) - 2√2

-1

Alex3 years ago

6 0

Answer:

4√2 = 5.657

9 - 5.657 = 3.343

√3.343 = 1.828

2√2 = 2.828

1.828 - 2.828 = -1

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4 years ago

Read 2 more answers

Find the small positive integer solution that solves the equation. if there is no solution, type NONE.

Degger [83]

9514 1404 393

Answer:

x = 7

Step-by-step explanation:

The equation can be rewritten to ...

8x = 13n +4 . . . . for some integers x and n

x = (13n +4)/8

For x to be an integer, 13n must be an odd multiple of 4. Since 13 is an odd number, n=4 will do.

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x = 7

The graph shows a "trial and error" method of solution. Only values of x less than 13 need to be examined.

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3 years ago

In the city of Carmen, there is a drawbridge that is opened twice per hour over the summer. The graph below shows the number of

n200080 [17]

Answer:

1) Between 0 and 1 minute the rate of change is 25 ft./min

2) Between 1 and 2 minute the rate of change is 0 ft./min

3) Between 2 and 4 minute the rate of change is -12.5 ft./min

Step-by-step explanation:

1) Between 0, and 1 feet, we have;

The rate of change = (Final height - Initial height)/(Final time - Initial time)

The rate of change = (40 - 15)/(1 - 0) = 25 ft/min

Between 0 and 1 minute the rate of change = 25 ft./min

2) Between 1, and 2 feet, we have;

The rate of change = (40 - 40)/(2 - 1) = 0 ft/min

Between 1 and 2 minute the rate of change = 0 ft./min

3) Between 2, and 4 feet, we have;

The rate of change = (15 - 40)/(4 - 2) = -12.5 ft/min

Between 2 and 4 minute the rate of change = -12.5 ft./min

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3 years ago

I need help with intercepts from a graph

Rina8888 [55]

Explanation: The y axis is the line that goes up and down, vertical. The x axis is the line that goes straight across, horizontal. So, when looking for intercepts we have to see what numbers your graphed line goes through.

Make sure when you are writing your points you write it in (x,y) form. If you don't it will be wrong.

So, for our x intercept it would be -7,0.

This is because your graphed line goes through x at -7 and it has no y, so that would be 0.

For your y intercept, it would be 0,2

This is because our line does not go through x, so we make that 0. It does go through y at 2.

Hope this helps :)

If you need elaboration on anything let me know. I know sometimes with math it is kind of hard to explain through typing.

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3 years ago