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Bumek [7]
3 years ago
9

PLEASE HELP WITH THESE 3

Mathematics
1 answer:
Roman55 [17]3 years ago
4 0

Answer:

1. 5 hours

2. x<2000-637 (he can spend $1363 on eveything else)

3. $15.5

Step-by-step explanation:

You might be interested in
If Rs 42,000 is left after paying an income tax at the rate of 30%.Find the income
Naddika [18.5K]

Answer:

Total income is 60,000

Step-by-step explanation:

I. if paid rate is 30%, that's mean 42,000 is 70%

II. Perform ratio 70/100 = 42,000/x

                       70*x = 100 * 42,000

                        70x = 4,200,000

                            x = 60,000

III. If you perform 30/100 = x/60,000 will be 42,000

Sorry for late.

                       

5 0
3 years ago
Express M=cos3A + cos A and N = sin3A + sin A as a product form​
elena-14-01-66 [18.8K]

Answer:

2cosAcos2A, 4sinAcos^2A

Step-by-step explanation:

cos3A+cosA

2cos((3A+A)/2)cos((3A-A)/2)

2cos(4A/2)cos(2A/2)

2cosAcos2A

sin3A+sinA

2sin((3A+A)/2)cos((3A-A)/2)

2sin(4A/2)cos(2A/2)

2sin2AcosA

4sinAcos^2A

3 0
2 years ago
The masses of four planets in a solar system outside the Milky Way are given below.
zhenek [66]
Your answer is Planet B, Planet D, Planet A, Planet C. 
Look at the exponents.
23 comes before 24 and 27. So 3.30 x 10 ^ 23 comes first. Next, 24, and there are 2, so  go by the decimals, 4.87 comes before 5.97. So 4.87 x 10^24 comes before 5.97 x 10^24. Then, that leaves 1.89 x 10^27.
7 0
3 years ago
Show that y2+ x-3 =0 is an implicit solution to dy/dx =-1/ (2y) on the interval (- [infinity] , 3)
Sedaia [141]

Answer:

Implicit function

\frac{d y}{d x} = \frac{-1}{2y}

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given  y² + x - 3=0 ...(i)

Differentiating equation (i) with respective to 'x', we get

                   2 y \frac{d y}{d x} +1 = 0

           ⇒     2 y \frac{d y}{d x} = -1

           ⇒     \frac{d y}{d x} = \frac{-1}{2y}

                 \frac{d y}{d x} = \frac{-1}{2 (3)}

                 \frac{d y}{d x} = \frac{-1}{6}

 

4 0
3 years ago
Solve the inequality:<br>(x+2)/(x^2-3x)&gt;0​
makkiz [27]

Answer:

The inequality is equivalent to x(x+2)(x−3)>0 , with the additional conditions that x≠0 and x≠3 .

Since x(x+2)(x−3) only changes signs when crossing −2 , 0 and 3 , from the fact that the evaluating the polynomial at 4 yields 24 , we see that the polynomial is

positive over (3,∞)

negative over (0,3)

positive over (−2,0)

negative over (−∞,−2)

Thus the solution set for your inequality is (−2,0)∪(3,∞) .

Step-by-step explanation:

hi Rakesh here is your answer :)

#shadow

7 0
3 years ago
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