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horsena [70]
3 years ago
11

For brainiest:):):):):):):):):)

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
3 0

Answer:

can i just get brainliest i need points  :]

Step-by-step explanation:

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A train travels a total of 38 km at a constant speed of 90 km/h.
Zarrin [17]

Answer:

25 minutes and 33 seconds

Step-by-step explanation:

please brainiest

5 0
2 years ago
Use a single digit times a power of 10 to express the number 0.000023456
Aloiza [94]

Answer:

2.3456 x 10^-5

Step-by-step explanation:

4 0
3 years ago
HELP BEFORE TOMORROW PLZZZ (show how to solve it plz)
Zepler [3.9K]
40/1.4=28.57 i think this is right
6 0
2 years ago
Given sinx+1/sinx=1+cscx, find a numerical value of one trigonometric function of x.
Nana76 [90]

Answer:

x = π/2 or

x = π/2 + 2πn (for any value of n)

Step-by-step explanation:

We need to find the numerical value of the trigonometric function sinx+1/sinx=1+cscx

Subtract 1+cscx on both sides

sinx + 1/sinx -(1+csc x) = 1+cscx - (1+cscx)

sinx + 1/sinx -1 -csc x = 0

Taking LCM i.e, sinx and solving

(sinx)(sinx) + 1 - sinx -cscx(sinx) / sinx = 0

Multiplying sinx on both sides

sin^2 x + 1 -sinx - cscx(sinx) =0

as we know, cscx = 1/ sinx

sin^2 x + 1 -sinx - (1/sinx)(sinx) = 0

Solving,

sin^2 x + 1 -sinx - 1 = 0

sin^2 x - sin x =0

Let u = sinx

Putting it in above equation

u^2 - u =0

Solving the equation:

u= 1 , u= 0

Putting back the value of u

sin(x) = 1 and sin(x) = 0

x = sin ⁻¹ (1) and x = sin ⁻¹ (1) =0

x = 90° or π/2 and x = 0 (undefined for the question)

So, x = π/2 or

x = π/2 + 2πn (for any value of n)

3 0
2 years ago
According to an advertisement for Colgate toothpaste, 4 out of 20 Dentist prefer Colgate. There are 150 Dentist in a certain cit
melamori03 [73]

Answer:

According to an advertisement for Colgate toothpaste, 4 out of 20 Dentist prefer Colgate. There are 150 Dentist in a certain city.

Let the number of dentists prefer Colgate in the city be x

\frac{4}{20}  =  \frac{x}{150}  \\ x =  \frac{4 \times 150}{20}  \\  \boxed{x = 30}

<h3>30 dentists prefer Colgate.</h3>

6 0
2 years ago
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