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chubhunter [2.5K]
3 years ago
11

Which equations to the right are Not True? (A) 12-2=2-12 (B) 12+2=2+12 (C) 12x2=2=2x12 (D) 12/2=2/12 Prove your answer.

Mathematics
2 answers:
sasho [114]3 years ago
7 0
D is the the equation that isn’t correct
Genrish500 [490]3 years ago
6 0
I think the answer is A. Hope it helps
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Fynjy0 [20]

Answer:

It seems like you misunderstood the instructions, though I don't blame you because they wrote it strangely. I believe that you're supposed to draw your own conclusion and then explain how you go there, rather than analyze a conclusion that was already drawn for you. If a long drive=a large fare, and you've been told that the driver has a long drive, you can draw the conclusion that "The fare will be large."

5 0
2 years ago
Find the perimeter of a rectangle whose length is 3 cm greater than its height, and whose area is 40 cm².
jonny [76]

Answer: 26\ cm

Step-by-step explanation:

The perimeter of a rectangle can be calcualated with this formula:

P=2l+2h

Where "l" is the lenght and "h" is the height.

 The area of a rectangle can be found with this formula:

A=lh

Where "l" is the lenght and "h" is the height.

In this case we know that:

A=40\ cm^2

Therfore, we can susbsitute them into A=lh and solve for "h" in  order to find its value:

40=(h+3)h\\\\40=h^2+3h\\\\h^2+3h-40=0

Find two number whose sum is 3 and whose product is -40. These are -5 and 8. Then, factorizing, we get:

(h-5)(h+8)=0\\\\h_1=5\\\\h_2=-8

The positive value is the height. Then:

h=5\ cm

Since the length is 3 centimeters greater than its height, we get that this is: Then:

l=5\ cm+3\ cm\\\\l=8\ cm

Substituting values into P=2l+2h, we get that the perimeter is:

P=2(8\ cm)+2(5\ cm)\\\\P=26\ cm

8 0
3 years ago
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Answer:

The average amount he paid over 3 days is $15.47.

Step-by-step explanation:

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Jack's rent will increase to $445

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State the property that is demonstrated: 4 + 7 = 7 + 4.
Novosadov [1.4K]
Im pretty sure the answer is c. commutative 
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3 years ago
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