All categories

2 years ago

The distance between two stations is 540 km. A train takes 3 hours to

Mathematics

1 answer:

mihalych1998 [28]2 years ago

8 0

180 km/hr
50 m/s
Here’s the work

You might be interested in

Lisa [10]

Answer:

what? what is this supposed to be?

4 0

2 years ago

if i wanted to make a 40,000 payment in one year with a 5% annual interest rate, how much should i invest now?

IRINA_888 [86]

Answer:

38,095.24

Step-by-step explanation:

40,000 = P(1 + 0.05)^1

P = 40,000/1.05

P = 38095.2380952

5 0

2 years ago

Please help! x^3 +y^3=9

Crank

Step-by-step explanation:

Taking the derivative of both sides with respect to x, we get

$\dfrac{d}{dx}(x^3 + y^3) = \dfrac{d}{dx}(3)$

$\Rightarrow 3x^2 + 3y^2\dfrac{dy}{dx} = 0$

Solving for $\frac{dy}{dx}$ , we get

$\dfrac{dy}{dx} = -\dfrac{3x^2}{3y^2} = -\dfrac{x^2}{y^2}$

7 0

2 years ago

6-3(2x-3)=5(6-x) -4x

kenny6666 [7]

Answer:

$x = 5$

Step-by-step explanation:

Given

$6-3(2x-3)=5(6-x) -4x$

Required

Solve

$6-3(2x-3)=5(6-x) -4x$

Open Brackets

$6-3*2x-3*-3=5*6-5*x -4x$

$6-6x+9=30-5x -4x$

Collect Like Terms

$-6x + 5x + 4x = 30 - 6 - 9$

$3x = 15$

Solve for x

$x = \frac{1}{3} * 15$

$x = 5$

7 0

2 years ago

Solve the equation. Check your solution.

Tasya [4]

Answer:

x = 5

Step-by-step explanation:

x^2/(x + 5) = 25/(x+5) Subtract the right side from both sides.

x^2/(x + 5) - 25/(x + 5) = 0

x^2 - 25

======= = 0

x + 5

(x + 5)(x - 5)

============= = 0

(x + 5)

Cancel x + 5 in the numerator and denominator.

x - 5 = 0

x = + 5

Does it check?

x^2/(x + 5) = 25/(x + 5)

x = 5

5^2/(10) = 25/10

25/10 = 25/10 Yes it checks.

7 0

2 years ago