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2 years ago

A test is worth 140 points. Ten percent of those points are from one short-answer question. How many points is the short-

Mathematics

2 answers:

Assoli18 [71]2 years ago

5 0

Answer: b. 14

Step-by-step explanation:

quiz on edge 2020

A test is worth 140 points. Ten percent of those points are from one short-answer question. How many points is the short-answer question worth?

14 points :D

Mashutka [201]2 years ago

4 0

The answer is 14. Since 140 x .10 = 14.

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Which is greater than 4?<br><br>(a) 5,<br><br>(b) -5,<br><br>(c) -1/2,<br><br>(d) -25.

Allisa [31]

Answer:

<h2>(a) 5</h2><h3>> 5 is greater than 4</h3>

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2 years ago

Integration by Parts Evaluate e-2x cos(2x) dx.

kifflom [539]

Let

$I = \displaystyle \int e^{-2x} \cos(2x) \, dx[/]texIntegrate by parts:[tex]\displaystyle \int u \, dv = uv - \int v \, du$

with

$u = e^{-2x} \implies du = -2 e^{-2x} \, dx \\\\ dv = \cos(2x) \, dx \implies v = \dfrac12 \sin(2x)$

Then

$\displaystyle I = \frac12 e^{-2x} \sin(2x) + \int e^{-2x} \sin(2x) \, dx + C$

Integrate by parts again, this time with

$u = e^{-2x} \implies du = -2 e^{-2x} \, dx \\\\ dv = \sin(2x) \, dx \implies v = -\dfrac12 \cos(2x)$

so that

$\displaystyle I = \frac12 e^{-2x} \sin(2x) - \frac12 e^{-2x} \cos(2x) - \int e^{-2x} \cos(2x) \, dx + C\\\\ \implies I = \frac{\sin(2x)-\cos(2x)}{2e^{2x}} - I + C \\\\ \implies 2I = \frac{\sin(2x) - \cos(2x)}{2e^{2x}} + C \\\\ \implies I = \boxed{\frac{\sin(2x) - \cos(2x)}{4e^{2x}} + C}$

6 0

1 year ago

Please help me out here I'm failing math.

natulia [17]

Answer:

-4r - 11 = 4r + 21

-4r -4r = 21 + 11

-8 = 32 (Divide both sides by -8)

/ /

-8 -8

= -4

8 0

2 years ago

Two ships leave from the same port. One travels west 84 miles and the other travels 62 miles north. Determine the distance betwe

Lerok [7]

The distance the ships traveled are like the legs of a triangle and the question wants to know the hypotenuse. To find the hypotenuse, use the pythagorean theorem. this is a^2 + b^2 = c^2, with a and b being the legs and c being the <span>hypotenuse.
</span>Plug in known values:
84^2 + 62^2 = c^2
Solve:
84^2 = 7056
62^2 = 3844
7056 + 3844 = c^2
7056 + 3844 = 10900
10900 = c^2
Now you just need to isolate c by finding the square root of both sides.
√10900 = 104.403
√c^2 = c

So c = 104.403, or just 104.40 when rounded to the nearest tenth.
And if c is 104.40, then that means the hypotenuse is 104.40.
And all of that basically means that the distance between the ships is 104.40 miles.

5 0

2 years ago

Ali ran 3/10 km before school after school she ran 1/5 km

miss Akunina [59]

Answer:

1/2 km

Step-by-step explanation:

3/10 + 1/5, find common denominators

3/10 + 2/10 = 5/10, simplify

1/2 km

8 0

2 years ago