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3 years ago

9

Connor bought a baseball card eight years ago that has depreciated by $120 since he purchased it. Find the average yearly change

in the value of the card.

1 answer:

Ostrovityanka [42]3 years ago

3 0

Answer:

It decreased in value by $15 a year.

Step-by-step explanation:

I put it in the form of an equation and solved from there.

120/8=x

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Two customers went to a post office to buy postcards and large envelopes. Each postcard

astraxan [27]

The right answer is Option A.

Step-by-step explanation:

Let,

x be the postcards

y be the large envelops

According to given statement;

14x+5y=12 Eqn 1

10x+15y=24.80 Eqn 2

Multiplying Eqn 1 by 3;

$3(14x+5y=12)\\42x+15y=36\ \ \ Eqn \ 3$

Subtracting Eqn 2 from Eqn 3;

$(42x+15y)-(10x+15y)=36-24.80\\42x+15y-10x-15y=11.20\\32x=11.20\\$

Dividing both sides by 32

$\frac{32x}{32}=\frac{11.20}{32}\\x=0.35$

Putting x=0.35 in Eqn 1;

$14(0.35)+5y=12\\4.90+5y=12\\5y=12-4.90\\5y=7.10$

Dividing both sides by 5

$\frac{5y}{5}=\frac{7.10}{5}\\y=1.42$

Therefore, one large envelope costs $1.42

The right answer is Option A.

Keywords: linear equations, subtraction

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago

Round each addendum to the nearest ten. 478 + 112

Amiraneli [1.4K]

500 and 100 because if you see the seven right, seven is the judge and so as the one. Make it 500 and the next number 100. So you'll have en estimate of 600. Ur welcome.

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4 years ago

Create a list of steps, in order, that will solve the following equation.

AleksandrR [38]

Step-by-step explanation:

Add 1 to both sides

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Take the square root of both sides

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(straight from khan academy hints)

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yawa3891 [41]

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Step-by-step explanation:

p/a=x

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14.70/3=4.90

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Pavel [41]

Answer:

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Step-by-step explanation:

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