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Harlamova29_29 [7]
3 years ago
15

Please need urgent help. It's my final question. I'll have be brainliest!!

Mathematics
1 answer:
Alecsey [184]3 years ago
8 0
X=32

All triangles add up to 180 degrees so if the right angle is 90 degrees then you have 90 degrees left. Next, you take the 2x and x-6 and plug them into the equation 3x-6=90. Once you solve that you get x=32.
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4. A sports car accelerates from rest to a final velocity of 64 m/s at a rate of 12.3
Ivanshal [37]

Answer:

t = 5.2\ s

Step-by-step explanation:

Given

a= 12.3m/s^2 --- acceleration

v = 64m/s --- final velocity

u =0m/s --- initial velocity (it is 0, because the car starts from rest)

Required

Determine the time taken

This will be solved using Newton's first equation of motion:

v = u + at

Substitute values for v, u and a

64 = 0 + 12.3*t

64 = 12.3t

12.3t = 64

Make t the subject

t = \frac{64}{12.3}

t = 5.2\ s

<em>Hence, the time taken is approximately 5.2 seconds</em>

6 0
3 years ago
If a is inversely proportional to x, a=15 when x=25 find the constant of variation, k
Rudik [331]

Answer:

Step-by-step explanation:

"Inversely proportional to x" in this situation is represented by a = k/x.

Find k:

Let a = 15 and x = 25, then calculate k:

15 = k/25)

Multiplying both sides by 25 yields k = 15(25), or k = 3/5

                       3

and so a = -----------

                      5x

7 0
3 years ago
Observa las dimensiones del siguiente portarretrato, y escribe la expresión que determina el área disponible para la fotografía
777dan777 [17]

Answer:

<h2>D</h2>

Step-by-step explanation:

The dimensions of the portrait are attached.

The total area of the portrait is represented by its width 5+x and its length x+1.

We know by definition that the area of a rectangle is

A= w \times l

Where w is the width and l is the length.

Using the given expressiones, we have

A=(5+x)(x+1)=5x+5+x^{2} +x=x^{2} +6x+5

Therefore, the right answer is D.

3 0
3 years ago
Very urgent.... Anyone please help me..<br> I need it with explanation!
nexus9112 [7]

Answer:

  • P(y) = 0.005y² -10y -1000000
  • 3,200,000

Step-by-step explanation:

a) Profit is the difference between revenue and cost.

  P(y) = R(y) -C(y)

  P(y) = (0.005y² +10y) -(20y +1000000) . . . . use the functions for revenue and cost

  P(y) = 0.005y² -10y -1000000 . . . . . profit as a function of y

___

b) Evaluating this function for y=30,000, we get ...

  P(30000) = 0.005(30000)² -10(30000) -1000000

  = 3,200,000

The company will have a profit of 3,200,000 from the sale of 30,000 cars.

8 0
3 years ago
Find the value of each expression. Show your work.
Alik [6]
19. 10C418. 9P3 <span> A POWER!!!!!!!!!!!!!!!!!!!!!!!!!!!!</span>
3 0
3 years ago
Read 2 more answers
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