2 years ago

Someone help!

Mathematics

1 answer:

Alexandra [31]2 years ago

8 0

I think it’s r.
jordan owes the least amount of money

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Suppose you buy a phone for $200 and its value depreciates linearly. If the phone is worth $115 after four years, then what is t

vredina [299]

Answer:

$72.5

Step-by-step explanation:

Initial value = $200
Depreciated value after 4 years = $115

<u>Since depreciation rate is linear, then:</u>

200 - 4x = 115
4x = 200 - 115
4x = 85
x = 85/4
x = 21.25

<u>Value after 6 years:</u>

200 - 6*21.25 = 200 - 127.5 = $72.5

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3 years ago

A triangle has 2 sides that equal 6 inches. The other side equals 4 inches. What kind of triangle is this

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Left parenthesis 5 plus 2 square root of 6 right parenthesis squared = a plus b square root of 6 then the value of a and b are

Ganezh [65]

Answer:

The values of $a$ and $b$ are $33$ and $\frac{20\sqrt{3}}{3}$ , respectively.

Step-by-step explanation:

The statement is equivalent to the following mathematic expression:

$\left(5 + 2\sqrt{2})^{2} = a + b\cdot \sqrt{6}$ (1)

By definition of the perfect square trinomial:

$25 + 20\cdot \sqrt{2} + 8 = a + b\cdot \sqrt{6}$

$33 + 20\sqrt{2} = a + b\cdot \sqrt{6}$

And by direct comparison we have the following system:

$a = 33$ (2)

$b\cdot \sqrt{6} = 20\sqrt{2}$ (3)

By (3), we solve for $b$ :

$b = \frac{20}{\sqrt{3}}$

$b = \frac{20\sqrt{3}}{3}$

The values of $a$ and $b$ are $33$ and $\frac{20\sqrt{3}}{3}$ , respectively.

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A student's course grade is based on one midterm that counts as 20% of his final grade, one class project that counts as 5%

Ludmilka [50]

Answer:

Step-by-step explanation:

The weighted average of the student's scores is ...

0.20×63 +0.05×97 +0.35×85 +0.40×77 = 78

The student's overall final score is 78.

The letter grade earned is between 70 and 80, so is a C.

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Helga [31]

Answer:

Where's the picture?

Step-by-step explanation:

Can't see it.

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