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Molodets [167]
3 years ago
14

Sam bought 8 new baseball cards to add to his collection. The next day his dog ate half of the collection. There are now only 25

cards left how many cards did Sam start with
Mathematics
1 answer:
slamgirl [31]3 years ago
3 0
His original amount is represented by x
so sam bought 8 baseball cards (x+8)
then next day, dog ate 1/2 so we now have 1/2
1/2 was now 25
so we have
\frac{x+8}{2} =25
multily both sides by 2
x+8=50
subtract 8
42=x
oriinal amount=42 cards

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belka [17]
The speed of the ball is 
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7 0
3 years ago
Multiply the following numbers. Reduce the answer to the lowest terms. 3 1/8 times 1/7 please hurry!
STALIN [3.7K]

Answer:

25/56

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
At Whole foods they mix two kinds of nuts: peanuts which cost $2.50 per kilogram and walnuts which cost $4.50 per kilogram how m
Allushta [10]

Answer: 37 kilograms of walnuts should be mixed.

Step-by-step explanation:

Let x represent the number of kilograms of peanuts needed to make the mixture.

Let y represent the number of kilograms of walnut needed to make the mixture.

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x + y = 100

The worth of the mixture is $3.24 per kilogram. It means that the total worth of the mixture is

3.24 × 100 = $324

peanuts cost $2.50 per kilogram and walnuts cost $4.50 per kilogram. It means that

2.5x + 4.5y = 324- - - - - - - - - -1

Substituting x = 100 - y into equation 1, it becomes

2.5(100 - y) + 4.5y = 324

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- 2.5y + 4.5y = 324 - 250

2y = 74

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x = 100 - y = 100 - 37

x = 63

3 0
3 years ago
A student thinks that (1, 2) is a solution to y = 2x - 3. While checking the solution, the student gets 1 = 2(2) -3. What error
BabaBlast [244]
He put in the value of x into y
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6 0
3 years ago
A cylindrical water trough has a diameter of 6 feet and a height of 2 feet. It is being filled at the rate of 4 ft^3/min. How fa
viva [34]
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<span>dV/dt =  (dV/dh) * (dh/dt)
</span>
2 ft³/min = 9π ft²   * (dh/dt)

9π ft²   * (dh/dt) = 2 ft<span>³/min
</span>
(dh/dt) = (2 ft³/min)/(9π ft<span>²)   

(dh/dt) = (2/</span>9π)  ft/min

So the water level is rising at  (2/9<span>π)  ft/min.</span>
8 0
3 years ago
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