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stiks02 [169]
4 years ago
9

A baseball card bought for $75 increases in value by 3% per year. what is the value of the card after 15 years

Mathematics
1 answer:
sammy [17]4 years ago
8 0
If the value of the baseball card increases by 3% per year then we can say that each year the value of the card may be multiplied by 103% = 1.03, thus:

Value after n years = original price*(1.03)^n
Value after 15 years = 75*(1.03)^15
= $116.85
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He made a mistake in step #2. It seemed to be a trivial mistake because it involved signs, but it still had a great impact. Since step#2, his solution was already wrong.

Instead of
(-1)²-4(2)(-6) = 1 + 48 = 49

What he did is
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4 0
3 years ago
I have just one question, could someone please answer it?? (see linked file)
Annette [7]

The solution is x=1 and y=-2

Further explanation:

Given equations are:

\frac{7}{2}x-\frac{1}{2}y=\frac{9}{2}\\3x-y=5

Multiplying equation no. 1 with 2 will give us:

7x-y=9       Eqn 3

From equation no 2:

3x-y=5\\-y=5-3x\\y=3x-5

Putting the value of y in eqn 3

7x-(3x-5)=9\\7x-3x+5=9\\4x=9-5\\4x=4\\\frac{4x}{4}=\frac{4}{4}\\x=1\\Putting\ x=1\ in\ equation\ 2\\3(1)-y=5\\3-y=5\\-y=5-3\\-y=2\\y=-2\\

The solution is x=1 and y=-2

Keywords: Linear equations, Solution set

Learn more about linear equations at:

  • brainly.com/question/561665
  • brainly.com/question/537998

#LearnwithBrainly

8 0
3 years ago
PLEASE HELP!!! DONT IGNORE ME!!!
MrRa [10]
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2. 10^2-2x=0
A = 10
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3. x^2–3x-40=0
A = 1
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4. x^2+3x-2=0
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5. 4x^2-17x+8=0
A = 4
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Remember the equations should look like Ax^2+Bx+C=0 (in this order!!)
5 0
3 years ago
How could you use subtraction to find the area of a figure
wel

Answer:

brainly.com/question/7699717

Step-by-step explanation:

8 0
3 years ago
The value of the surface area of the cylinder is equal to the value of the volume of the cylinder. Find the value of x.
zlopas [31]

Answer:

x = 2.5

Step-by-step explanation:

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2πr(h + r) = πr²h

Radius (r) is given as 2.5 cm

height (h) = x cm

Input the values and solve for x

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2πr(h + r) = πr(rh)

2(h + r) = rh (πr cancels πr)

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Subtract 2x from both sides

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5 = 0.5x

Divide both sides by 0.5

\frac{5}{0.5} = \frac{0.5x}{0.5}

2.5 = x

x = 2.5

8 0
3 years ago
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