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QveST [7]
3 years ago
5

Mike bought 7 new baseball cards to add to his collection. The next day his dog ate half of his collection. There are now only 4

1 cards left. How many cards did Mike start with?
Mathematics
1 answer:
bulgar [2K]3 years ago
3 0

Answer: Mike started with 75 cards

Step-by-step explanation:

Hi, to answer this question we have to write an equation:

The number of cards mike started with (x) plus the new cards added (7) must be divided by 2 (since his dog ate half of his collection).

That expression must be equal to the number of cards left (41)

Mathematically speaking:

(x + 7) /2 = 41

Solving for x:

x+7 = 41x2

x+7 = 82

x = 82-7

x = 75 cards

Feel free to ask for more if needed or if you did not understand something.  

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Assume body weight and height are related by the formula W=2H+13, where W represents weight in pounds and H represents height in
yulyashka [42]
Given the equqation
W = 2H + 13
where
W is the weight in lb
H is the height in inches

If the height of a person is 5 ft 6 in, we must first convert it to inches. So,
H = 5(12) + 6
H = 66 in

The body weight then is,
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8 0
3 years ago
What equation is equivalent to x2 + 20x + 81 = -27? Can you show me how you got the answer please
Alla [95]

The equivalent equation is x² + 20x = -102

<h3>Simplification of quadratic equation</h3>

The equivalent equation can be obtained by factorizing or simplifying the given quadratic equation as shown below;

x² + 20x + 81 = -21

<em>collect similar terms together</em>

x² + 20x + 81 + 21 = 0

x² + 20x + 102 = 0

The equation can also be written as x² + 20x = -102

Thus, the equivalent equation is x² + 20x = -102

Learn more about simplification of quadratic equation here: brainly.com/question/1214333

4 0
2 years ago
The speed limit on 1-35 is 80 miles per hour. How far can Mrs.Mindy drive in 2 1/2 hours?
Mars2501 [29]
The answer to this is C
8 0
3 years ago
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sertanlavr [38]
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3 0
2 years ago
LOTS of points due today!!!!! 8-10
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Answer:

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