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2 years ago

the fastest train in the us can travel 2.6 miles per minute.At that speed how far does it go in half an hour?

2 answers:

8 0

The train good 2.6 miles in a minutes and you are looking for how far it does in 30 minutes you have multiply 30 times 2.6 and you get 78 miles
30•2.6 = 78

Readme [11.4K]2 years ago

4 0

You have to multiply 2.6 × 30=
$2.6 \times 30 =78.0$

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Find the coordinates of H if X(-8, 4) is the midpoint of GH and G(2, -9).

skelet666 [1.2K]

Step-by-step explanation:

Hey there!

The given midpoint is; X(-8,4) and G(2,-9).

To find: H

Now; You need to use formula for midpoint.

$midpoint(x) = ( \frac{x1 + x2}{2} , \frac{y1 + y2}{2} )$

Put all values.

$( - 8,4) = (\frac{ 2 + x}{2} , \frac{ - 9 + y}{2} )$

As they are equal, their corresponding elements are equal.

$- 8 = \frac{2 + x}{2}$

$- 16 - 2 = x$

x = -18

$4 = \frac{ - 9 + y}{2}$

$4 \times 2 = - 9 + y$

$8 + 9 = y$

$y = 17$

Therefore, y = 17.

Therefore, H =( -18,17).

Hope it helps....

4 0

2 years ago

Read 2 more answers

Proof: sin(x) + cos(x) = √2sin(x + π/4)

Oksi-84 [34.3K]

Hello :
sin(x) + cos(x) = √2(1/√2 sin(x) +1/√2 cos(x))
but : 1/√2 = cos(π/4) = sin( π/4)
sin(x) + cos(x) = √2( cos(π/4)sin(x) + sin( π/4) cos(x)) =√2sin(x + π/4)
because : cos(π/4)sin(x) + sin( π/4) cos(x)=sin(x + π/4) by identity :
sin(a+b) = sina cosb +cosa sinb

5 0

3 years ago

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

MrRissso [65]

Formula for the area of a face of a cube: A = length x width

Let's find the area of one face.

A = 5 x 5

A = 25

Now, let's multiply the area of one face by 6 because a cube has 6 faces.

25 x 6 = 150

A = 150 square centimeters

Hope this helps! :)

4 0

2 years ago

A regulation softball has a circumference of 12 inches. what is the volume of the softball?

frez [133]

V=(4/3)pir^2

c=2pir
12=2pir
divide 2
6=pir
divide by pi
6/pi=r

sub for r
V=(4/3)pi(6/pi)^2
V=(4/3)pi(36/(pi^2))
V=(4/3)(36/pi)
V=144/(3pi)
V=48/pi
aprox pi=3.141592
V=15.2788777155

V=15.28 in^3

8 0

2 years ago

What is the length of segment BC? (4 points)

valkas [14]

Answer:

the answer is 7 units

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers