MATHEMATICS MIDDLE SCHOOL

Light travels 300,000 km/s. The planet Mars is about 228,000,000 km from the sun. How would you find out how many minutes it takes light from the Sun to reach Mars?

Answers

Answer 1
Answer:

Answer:

12.67 minutes

Step-by-step explanation:

Time taken is given by distance divided by speed

Given distance of 228, 000, 000 km and speed of light as 300, 000 km/s then time will be

Time=228, 000, 000/300, 000=760 seconds

Conversion

60 seconds make up 1 minute

760 seconds will be 760/60

Time=760/60=12.666666666666

Rounded off, this is 12.67 minutes

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If the complex number x = 3 + bi and |x|^2 = 13, which is a possible value of b? A. 2
B. 3
C. 9
D. 10

20 points to the brainliest user!!!!

Answers

If x=3+bi, then

|x|=√(3^2+b^2).

You know that |x|^2=13, then

\left(√(3^2+b^2)\right)^2=13,\n \n 9+b^2=13,\n \nb^2=4,\n \nb=\pm 2.

Two possible complex numbers satisfy these conditions:

x_1=3+2i, \ x_2=3-2i.

As you can see the possible value of b is 2.

Answer: correct choice is A.

The gravitational pull on Planet X is about 40% that of Earth’s. Would Planet X weigh more or less than Planet Earth?

Answers

Answer:

Planet X weighs less than planet earth

Step-by-step explanation:

Planet X will weigh less than planet earth because its gravitational pull is only 40% of planet earth . This means that planet earth is heavier than Planet X .

The Martins drove the 468 miles between Memphis, Tennessee and Cincinnati, Ohio in one day. If they left Memphis at 7 a.m. and arrived in Cincinnati at 4 p.m., what was the Martins’ average speed?

Answers

52mph, depending what unit you need the answer in you may have to use conversions

9 lb equals how many ounces

Answers

144 because 1 pound is 16 oz so 16 times 9 equals 144

144 ounces are in 9 pounds because there are 16 ounces in 1 pound so you would do 16*9 which equals 144

Find the equation of a line parallel to x=7 and passing through the point (2, -5)

Answers

Answer:

x = 2

Step-by-step explanation:

x = 7 is a vertical line parallel to the y- axis.

Thus a parallel line will also be vertical with equation

x = c

where c is the value of the x- coordinates the line passes through.

The line passes through (2, - 5) with x- coordinate 2, thus

x = 2 ← equation of parallel line
X=2
Hope this helped

Guys please help with this::::there is a picture so please look and help!

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