Help me pls I give brainiest

Mathematics

2 answers:

Sophie [7]3 years ago

5 0

Answer:

x-7

Step-by-step explanation:

if you minus x-7 you would get a different answer cause its reversed

vova2212 [387]3 years ago

5 0

Answer:

The answer is B. x-7

Step-by-step explanation:

The others are mathematically correct. The reason B. is incorrect is because you cannot swap the (x) in a subtraction problem, like in addition or multiplication. It would make the answer completely incorrect, unlike the others.

The reason the others are correct is because a negative plus a positive (C.) would make it a positive, like A.. For example if you are on a number line, you would start at point C.. on the negative side. If you were to go to the right 7 times, because we are adding. It would give us the same answer as A..

D. is the same problem as C., just in a different form. We would do this problem the same way as we did C.. If we do it the same way, of course it would be the same as A. also.

Because we know this, it make B. the odd ones out, making it the correct answer. Hope this helped!

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Harper has $15 to spend at the grocery store. She is going to buy bags of fruit that cost $4.75 and one box of crackers that coa

kolezko [41]

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6 0

3 years ago

A plane traveled 1248 miles to Ft. Worth and back. The trip there was with the wind. It took 12

Artemon [7]

speed of the plane in still air is 76 m/s and speed of the wind is 28 m/s .

Step-by-step explanation:

Here we have , A plane traveled 1248 miles to Ft. Worth and back. The trip there was with the wind. It took 12 hours. The trip back was into the wind. The trip back took 24 hours. We need to find What is the speed of the plane in still air? What is the speed of the wind? Let's find out :

For Going trip :

Let speed of plane be u , and wind be v so : Speed = ( Distance ) / ( time )

⇒ $u+v = \frac{1248}{12}$