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3 years ago

15

A train is scheduled to make a journey of 300km at an average speed of 120km/hr it leaves 6 minutes late and it’s average speed

is increased so that it arrives on time find the new average speed

1 answer:

Alekssandra [29.7K]3 years ago

6 0

Answer:

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Step-by-step explanation:

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The value of 63−−√ lies between which two consecutive integers?

Gekata [30.6K]

The square root of 63 is about 7.9, which is between 7 and 8

3 0

3 years ago

Which equation is y = 2x2 – 8x + 9 rewritten in vertex form?

pishuonlain [190]

we have

$y=2x^{2} -8x+9$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$y-9=2x^{2} -8x$

Factor the leading coefficient

$y-9=2(x^{2} -4x)$

Complete the square. Remember to balance the equation by adding the same constants to each side

$y-9+8=2(x^{2} -4x+4)$

$y-1=2(x^{2} -4x+4)$

Rewrite as perfect squares

$y-1=2(x-2)^{2}$

$y=2(x-2)^{2} +1$ -----> equation in vertex form

therefore

the answer is the option C

$y=2(x-2)^{2} +1$

3 0

3 years ago

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The graph below shows a system of equations: y = -x - 2 and y = 2x - 5. The x-coordinate of the solution to the system of equati

sergey [27]

ANSWER

The x-coordinate of the solution to the system of equations is 1.

EXPLANATION

The given equations are:

y = -x - 2

and

y = 2x - 5.

We want to find the x-coordinate of the solution to the system of equations.

We equate the two equations to obtain an equation in x.

This implies that,

2x-5=-x-2

Group similar terms to obtain:

2x+x=-2+5

Simplify

3x=3

Divide both sides by 3.

x=1

The x-coordinate of the solution to the system of equations is 1

4 0

3 years ago

Solve the power equation <br> x to the 1/2 power + 3=5

sp2606 [1]

Answer:

x = 4

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

6 0

3 years ago

Work out the value of 3x + 2y when x=4 and y=-5

Kruka [31]

3x + 2y =

3*4 + 2*-5=

12 + -10 = 2

5 0

3 years ago

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