MATHEMATICS HIGH SCHOOL

How many feet per hour is 200cm per minute ?

Answers

Answer 1
Answer:

Answer:

393.7 feet per hr

Step-by-step explanation:

200cm per min

12000cm per hr

cm to feet. divide by 30.48

393.7 ft per hr
Answer 2
Answer: the answer is 393 feet per hour

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Angle x + 16 and Angle 4x - 5. They are vertical angles. Solve for x and the measure of the two angles.

A regular polygon could not have an interior angle measure of A.
45º
B.
90º
C.
150º
D.
160º

Answers

45° I think because 45° is half of 90° and no polygon interior angle is less than 90°

Walmart sell toothbrushes for 3.50 a pack but only pays 1.15 for them.What is the markup rate based on selling price?(answer Quickly please)

Answers

Answer:

2.45

Step-by-step explanation:

3.50

3-1= 2

50-15= 45

3.50 -1.15= 2.45

Write the expanded form for this expression

-1/2(y - x)

Answers

Answer:  =-1/2x+-1/2y

Step-by-step explanation:

Solve the system my elimination 9x + 2y = 9 6x - 2y = -4

Answers

Answer:

x = 1/3   y= 3

Step-by-step explanation:

9x + 2y = 9

6x - 2y = -4

Add the two equations to eliminate y

9x + 2y = 9

6x - 2y = -4

----------------------

15x   = 5

Divide each side by 15

15x/15 = 5/15

x = 1/3

Now we need to find y

6x - 2y = -4

6(1/3) -2y = -4

2 -2y = -4

Subtract 2 from each side

2-2y-2 = -4-2

-2y = -6

Divide each side by -2

-2y/-2 = -6/-2

y = 3

Solve 400 mg =_?_ g

0.0004
0.004
0.04
0.4

Answers

m=0.001\ some\ unit\n\n400\ mg=400\cdot0.001\ g=\boxed{0.4\ g}
There are 1000 milligrams, or mg, in one gram, or g.  Therefore, we have 400/1000=4/10=.4 grams in 400 milligrams.  The fourth answer is the best one.

Which of the following expressions is not equivalent to:4(3x2 + 6x)

A. 12x2 + 24x B. 2x(6x + 12) C. 6x(2x2 + 4x)

Answers

Answer=C

4(3x^2+6x)
can be simplified to...
12x^2+24x

To find out which expression isn't equivalent, you have to simplify them...

a=12x^x+24x

b=2x(6x+12)
b=12x^2+24x

c=6x(2x^2+4x)
c=12x^3+24x
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