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Paraphin [41]
3 years ago
11

Andrew bought 3 baseball cards for $240. After a few months, he got an offer from his friend Jack to buy the first card for doub

le its original value, along with either the second or third card. Andrew decided to sell the first card (at double its original value) along with the second card (at its original price) and got $320 for it. Or, selling the first card (at double its original value) card along with the third card (at its original price) would have only got him $280. What were the original prices for each of the 3 baseball cards? (80, 120, 40) (80, 130, 30) (130, 90, 20) (120, 80, 40) NextReset
Mathematics
2 answers:
Rzqust [24]3 years ago
8 0

Answer:

D. (120, 80,40)

Step-by-step explanation:

FOR PLATO USERS, D IS THE CORRECT ANSWER!!!

iragen [17]3 years ago
3 0
D. (120,80,40) just add it up really
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Given: 15+6(y−2)=21 Prove: y = 3 Drag and drop the reasons into the boxes to correctly complete the proof. Statement Reason 15+6
olchik [2.2K]

Answer:

Given:  15+6(y-2)=21

Distributive Property tells us that we multiply each term inside the parentheses with the term outside of the parentheses.

a\cdot(b-c) =a\cdot b -a\cdot c

Using distributive property on expression 6(y-2) to solve the further expression as:

15+6\cdot y - 6\cdot 2=21

Simplify:

15+6y-12 =21

Subtract the number 12 from 15 we get 3;

therefore, the expression become:

6y+3=21

Subtraction property of equality tells us that subtract the same number from both sides of an equation.

Now, subtract 3 from both the sides we get;

6y+3-3=21-3

Simplify:

6y=18

Now, divide by 6 on both the sides we get;

\frac{6y}{6}= \frac{18}{6}

On simplify we get;

y =3           Hence Proved!





7 0
3 years ago
What is the solution to -1.6 > b - (-4.4)
Bezzdna [24]

Answer:

B

Step-by-step explanation:

-1.6 > b - (-4.4) =

-1.6 > b + 4.4 ( - - cancels to become a +)

move 4.4 to left by subtracting 4.4 from both sides

-1.6 - 4.4 > b + 4.4 - 4.4 =

-6.0 > b + 0 =

-6.0 > b

6 0
2 years ago
Read 2 more answers
How to evaluate -4+3/4 plzzzz!
Pachacha [2.7K]

Answer:

-13/4

Step-by-step explanation:

Look for the LCM of both which is 4. 4÷1 ×-4 which is -16

then 4 divided by 4 which is 1 then × 3 which is 3.

now (-16+3)/4 to have -13/4

7 0
3 years ago
Given that y varies directly with x and y = 42 when x = 14, find y when x =90.
Anvisha [2.4K]
Direct Variation equation: y=kx, k=y/x
42/14=3
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3 0
3 years ago
Assume that there are an equal number of births in each month so that the probability is that a person chosen at random was born
NikAS [45]

Answer:

0.2773 = 27.73% probability that at the May celebration, exactly two members of the group have May birthdays

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they have a birthday in May, or they do not. The probability of a person having a birthday in May is independent of any other person. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Probability of a person being in May:

May has 31 days in a year of 365. So

p = \frac{31}{365} = 0.0849

Group of 20 friends:

This means that n = 20

What is the probability that at the May celebration, exactly two members of the group have May birthdays?

This is P(X = 2).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 2) = C_{20,2}.(0.0849)^{2}.(0.9151)^{18} = 0.2773

0.2773 = 27.73% probability that at the May celebration, exactly two members of the group have May birthdays

3 0
3 years ago
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