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bazaltina [42]
3 years ago
9

Help me!!!!!!!! Evaluate: 30 - 12÷3×2

Mathematics
2 answers:
umka21 [38]3 years ago
6 0

Answer:

22

Step-by-step explanation:

30 - 12 :3 ×2

30 - 4 ×2

30 - 8

22

velikii [3]3 years ago
5 0

Answer:

22

Step-by-step explanation:

The order of operations states that 12÷3×2 (division and multiplication) is done first from left to right .

12÷3×2 = 4 × 2 = 8

Therefore , 30 - 12 ÷ 3 × 2 = 30 - 8 = 22.

So, the answer is 22. Hope this helps!

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Y > 5x + 5 . . . (1)y > -1/2x + 1 . . . (2)
Part A: The graph of the system are two straight dotted lines with the first line passing through points (-1, 0) and (0, 5) with the region above the line shaded and the second line passing through (0, 1) and (2, 0) with the region above the line shaded. The two lines intersect at point (-8/11, 15/11).
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hope i helped
4 0
3 years ago
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It takes two hours for two machines to manufacture 10000 parts. If machine #1 can do the job in one hour less than machine #2, h
elena-14-01-66 [18.8K]

Answer:

Time machine one = 3.56

Time machine two = 4.56

Step-by-step explanation:

Let machine 2 do the job in x hours

Let machine 1 do the job in x - 1 hours.

The general formula for this problem is

Time = A*B/(A + B)

Givens

Time = 2 hours

B = x hours alone

A = x - 1 hours alone.

#################

x *( x - 1)

======= = 2

(x + x - 1)

(x^2 - x)/(2x - 1) = 2

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a = 1

b = - 5

c = 2

This gives 2 roots

x = 4.56

x = 0.43

The second root will not work because when 1 is subtracted from 0.43 the time give will be minus, which won't work.

Time for machine 2 is 4.56

The time for machine 1 is 3.56

Check

(A * B)/(A + B) = 2

A = 4.56

B = 3.56

Time = 4.56*3.56/(4.56 + 3.56)

Time = 16.2336/(8.12)

Time = 1.9992

The rounding error in the check comes from the rounding error in the times.  

4 0
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Answer:

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Reflection: Mirrors.

Rotation: Rotating a car wheel.

Step-by-step explanation:

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Answer:

C=\pi (56)

Step-by-step explanation:

we know that

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