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Andru [333]
4 years ago
5

Ryan has a collection of220 baseball cards.helets his bro have 1/4 of his collection & sells 20% of the coll to the baseball

card shop. he takes 15 cards to school to give his fireds how many baseball cards remain in ryan coll?
1/4=55 to school=15 70-220=150 205 of 150=30 shop 150-30=120 left???
Mathematics
1 answer:
patriot [66]4 years ago
7 0
So he gives 1/4 to his brother 220/4=55 then then he sells the 20% which is 220*.20=44 and then 15 he takes to his friends so if you add those you get        55+44=99+15=114 then subtract this number from the total 220-114=106
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Alenkasestr [34]
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7 0
3 years ago
Read 2 more answers
He sum of three consecutive odd integers is -123. What is the middle integer?
quester [9]

Answer:

-41

Step-by-step explanation:

Three consecutive.

-123/3 is -41

-40,-41,-42

answer is -41

7 0
3 years ago
Math help :) pleasee , and thnx
mylen [45]

Answer:

The ball is in the air for approximately 3.27 seconds ⇒ answer A

Step-by-step explanation:

* Lets explain how to solve the problem

- The height of the ball is modeled by the function

  h(t) = -4.9 t² + 16 t

- We need to find the time that the ball is in the air

- The ball is in the air from its initial position and then return to the

   same position

- That means h(t) = 0 because h(t) represent the height of the ball

  from its initial position

∵ h(t) = -4.9 t² + 16 t

∵ h(t) = 0

∴ 0 = -4.9 t² + 16 t

- Add 4.9 t² to both sides

∴ 4.9 t² = 16 t

- Subtract 16 t from both sides

∴ 4.9 t² - 16 t = 0

- Take t as a common factor

∴ t (4.9 t - 16) = 0

- Equate each factor by 0

∴ t = 0 and 4.9 t - 16 = 0

∵ 4.9 t - 16 = 0 ⇒ add 16 for both sides

∴ 4.9 t = 16

- Divide both sides by 4.9

∴ t = 3.2653

∴ t = 0 ⇒ initial position

∴ t = 3.2653 seconds ⇒ final position

* <em>The ball is in the air for approximately 3.27 seconds</em>

6 0
4 years ago
jack wants to run at least 275 miles before the baseball season begins. he has already run 25 miles. he plans to run 2.5 miles e
d1i1m1o1n [39]

Hey there! I'm happy to help!

We see that Jack has already run 25 miles.

25

He also wants to run 2.5 miles every day. This means we will multiply 2.5 miles by the number of days he runs. We will call the number of days x.

25+2.5x

And he needs this to equal 275.

25+2.5=275

We subtract 25 from both sides.

2.5x=250

We divide both sides by 2.5

x=100

So, Jack will need to run 100 days to meet his goal.

Have a wonderful day and keep on learning! :D

7 0
3 years ago
Which of the following explains how ΔAEI could be proven similar to ΔDEH using the AA similarity postulate?
Andrej [43]

Answer:

Yes, the AA similarity postulate can be used because a reflection over line f will establish that Line segment AB ≅ Line segment DE. If ΔMNL is rotated 180° about point N.

3 0
3 years ago
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