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Vinil7 [7]
3 years ago
14

(2x2 − x) + (x2 + 3x − 1)

Mathematics
1 answer:
kodGreya [7K]3 years ago
7 0
8x-1 13x-10 7+2x -3x+7
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What is the solution to the equation-0.2(x-20)=44-x
Black_prince [1.1K]

Answer:

x = 50

Step-by-step explanation:

8 0
3 years ago
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When a number is increased by 2.8%, the result is 56. What is the original number to
Sever21 [200]

Answer:

The original number was 54.5.

Step-by-step explanation:

If a number is increased by 2.8%, then it is 102.8% of it's original number.

In mathematics, "of" in virtually all cases means "multiplied by".

Therefore, we do the opposite:

1. Convert to a decimal.

102.8% = 1.028

2. Divide by the decimal.

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3. Round it to the nearest tenth.

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6 0
3 years ago
Pls answer i'll mark u brainlist
In-s [12.5K]

Answer: 2/3 hours

Step-by-step explanation:

okay so the speed now is 850, which is   850/340  = 2.5 times the original speed

Since It's 2.5 times the original speed,

2.5x = 5/3

so x = 5/3/2.5 = 2/3

7 0
2 years ago
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This semester, the tuition fee increased to $5,871. If this represents an increase by 14%, what was the original fee?
MissTica
Use a calculator its easy
7 0
3 years ago
HELP HELP !!!! PLEASE I NEED HELP WITH THIS PROBLEM !!!
Vesnalui [34]
This one is best done by elimination:

We need to start 4 meters away, so B is clearly wrong. 

We first move towards Mr. Wilson (i.e. distance is decreasing) so A is wrong.

Our speed is faster on the way back, so the two sloped section must have differing slopes, so D is wrong.
(D also doesn't start at 4, it's wrong for two reasons.)

Only C is left.

We can check each part to make sure. First we start at 4m, then move away, then stay still (zero slope) for three seconds, then move back faster (higher slope). All parts check out ok. 
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3 years ago
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