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Oduvanchick [21]
2 years ago
12

Find the value of x. Round to the nearest tenth. Can somebody plz help me with 16 and 19

Mathematics
1 answer:
Dmitrij [34]2 years ago
7 0

Answer:

<h3><em><u>BRAINLIESTTTTYSYDEUJEJE</u></em><em><u> </u></em><em><u>JJ3JEHSSNAAK</u></em><em><u> </u></em></h3>

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2. A maintenance crew is paving a road in 7-hour shifts. After
harkovskaia [24]

Answer:

The answer is the first one

Step-by-step explanation:

7 0
3 years ago
Find, correct to the nearest degree, the three angles of the triangle with the vertices d(0,1,1), e( 2, 4,3) − , and f(1, 2, 1)
Ksju [112]
Well, here's one way to do it at least... 

<span>For reference, let 'a' be the side opposite A (segment BC), 'b' be the side opposite B (segment AC) and 'c' be the side opposite C (segment AB). </span>

<span>Let P=(4,0) be the projection of B onto the x-axis. </span>
<span>Let Q=(-3,0) be the projection of C onto the x-axis. </span>

<span>Look at the angle QAC. It has tangent = 5/4 (do you see why?), so angle A is atan(5/4). </span>

<span>Likewise, angle PAB has tangent = 6/3 = 2, so angle PAB is atan(2). </span>

<span>Angle A, then, is 180 - atan(5/4) - atan(2) = 65.225. One down, two to go. </span>

<span>||b|| = sqrt(41) (use Pythagorian Theorum on triangle AQC) </span>
<span>||c|| = sqrt(45) (use Pythagorian Theorum on triangle APB) </span>

<span>Using the Law of Cosines... </span>
<span>||a||^2 = ||b||^2 + ||c||^2 - 2(||b||)(||c||)cos(A) </span>
<span>||a||^2 = 41 + 45 - 2(sqrt(41))(sqrt(45))(.4191) </span>
<span>||a||^2 = 86 - 36 </span>
<span>||a||^2 = 50 </span>
<span>||a|| = sqrt(50) </span>

<span>Now apply the Law of Sines to find the other two angles. </span>

<span>||b|| / sin(B) = ||a|| / sin(A) </span>
<span>sqrt(41) / sin(B) = sqrt(50) / .9080 </span>
<span>(.9080)sqrt(41) / sqrt(50) = sin(B) </span>
<span>.8222 = sin(B) </span>
<span>asin(.8222) = B </span>
<span>55.305 = B </span>

<span>Two down, one to go... </span>

<span>||c|| / sin(C) = ||a|| / sin(A) </span>
<span>sqrt(45) / sin(C) = sqrt(50) / .9080 </span>
<span>(.9080)sqrt(45) / sqrt(50) = sin(C) </span>
<span>.8614 = sin(C) </span>
<span>asin(.8614) = C </span>
<span>59.470 = C </span>

<span>So your three angles are: </span>

<span>A = 65.225 </span>
<span>B = 55.305 </span>
<span>C = 59.470 </span>
8 0
2 years ago
A producer of felt-tip pens has received a forecast of demand of 31,000 pens for the coming month from its marketing department.
Mila [183]

Answer:

6945 is the break-even quantity if pen sells for $4 each.

Step-by-step explanation:

We are given the following in the question:

Demand of pens = 31,000

Fixed cost = $25,000 per month

Variable cost per pen = 40 cents = $0.4

Selling price of each pen = $4

Let q be the break even quantity,

Then we can write:

\text{Selling price}(q) = \text{Fixrd cost} + \text{Variable cost}(q)

Putting values, we get,

4q = 25000 + 0.4q\\(4-0.4)q = 25000\\3.6q = 25000\\q = 6944.44 \approx 6945

Thus, 6945 is the break-even quantity if pen sells for $4 each.

5 0
3 years ago
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-3x + 4y – 5xy ; x= -3, y = 2<br> Need help ASAP plz
marysya [2.9K]

Answer:

47

Step-by-step explanation:

First, plug in the numbers.

x = -3 and y = 2.

-3(-3) + 4(2) - 5(-3)(2)

Simplify by multiplying.

-3 * -3 = 9

4 * 2 = 8

-5 * -3 * 2 = 30

Your new equation is:

9 + 8 + 30 = ?

Simplify by adding. 9 + 8 + 30 = 47

4 0
2 years ago
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Please help UwU<br> if correct you get Brainiest
ladessa [460]

Answer: C

Step-by-step explanation:

8 0
2 years ago
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