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3 years ago

Please help me please and thank you

Mathematics

1 answer:

Marizza181 [45]3 years ago

3 0

After 0 hours the train has travelled 90 miles from the station.
After 1 hour the train has travelled 135 miles from the station.

This means the train has travelled 135 - 90 = 45 miles in 1 hour.

Therefore the correct answer is A. 45 mph, because speed is the rate of change of distance.

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The room numbers of two adjacent classrooms are two consecutive even integers. If their sum is 654, find the classroom numbers.

IRINA_888 [86]

Answer: It is 326 and 328.

Step-by-step explanation: We know that the numbers must be even and consecutive, so we can figure this problem out by trial and error. Divide 654 by two, and then keep going until you get the proper answer.

(Hope this helps :) )

4 0

2 years ago

Rata-rata markah matematik untuk Amin, azman dan aziz adalah 73. Tanda Azman lebih 35 berbanding Amin manakala aziz dua kali gan

vagabundo [1.1K]

Answer:

The Amin's score in math was 46.

Step-by-step explanation:

The question is:

The average math score for Amin, azman and aziz is 73. Azman marks 35 more than Amin while aziz is twice that of Amun. What is Amin's sign?

Solution:

Let us denote that:

x = Amin's score in math

y = Azman's score in math

z = Aziz's score in math.

The average of x, y and z is, 73.

That is:

$\frac{x+y+z}{3}=73\\\\\Rightarrow x+y+z = 219$

Now it is provided that:

$y=x+35...(i)\\z=2x...(ii)$

Use the equations (i) and (ii) to determine the value of x as follows:

$x+y+z=219\\\\x+x+35+2x=219\\\\4x=184\\\\x=46$

Thus, the Amin's score in math was 46.

6 0

3 years ago

How are basic facts can help you find 10*20*30*40 mentally

Lena [83]

When you do the multiplication you can notice that 10, 20, 30, 40 all have 0's at the end.

So that means 10 *20*30*40 = 1*2*3*4*10000 = 24*10000 = 240,000

5 0

3 years ago

Factorise x^2 + 7x -30

kumpel [21]

The answer is
(x+10)(x-3)

7 0

3 years ago

Read 2 more answers

Complete the square to determine the minimum or maximum value of the function defined by the expression.

FrozenT [24]

Answer:

Option D. minimum value at −38