MATHEMATICS MIDDLE SCHOOL

A bag contains 30 marbles, 3 of which are blue, 20 are red, 5 are green, and 2 are purple. Emerson takes a marble out of the bag, records the color, and returns it to the bag. How many purple marbles should he expect after 300 trials?

Answers

Answer 1

Answer: 20 purple marbles.
2/30 is the probabilty of getting a purple marble when there is 30 marbles.
2/30=20/300.

Answer 2

Answer:

Answer:

Step-by-step explanation:

I did the FLVS quiz

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PROBLEM #1Keith has $500 in a savings account at the beginning of thesummer. He wants to have at least $200 in the account by theend of summer. He withdraws $25 a week for his cell phonebill.Write an inequality that represents Keith's situation.

Which expression is equal to 7/5?a. 7*5
b. 5*5*5*5*5*5*5
c. 7*7*7*7*7
d.7*5*7*5

* means multiplication

Answers

the answer is b because you do 5seven times

Answer:

Step-by-step explanation:

YOU DO it seven times

8r-5>6r-1or 4+4r<3r-3

Answers

For the first inequality you add 5 to each to get 8r>6r+4, then subtract 6r from each to get 2r>4 and divide by 2 so for that part r>2... For the second equation subtract 4 from each side to get 4r<3r-7, then subtract 3r to get r<-7... When you put it all together you get 2

7. Sans summer job is moving lawns in his neighborhood. Mr. Friedman wants his lawn cut every 8 days l, and Mr. Cooper wants his lawn cut every 12 days. If same mows both yards today, how many days will it be before he mows both lawns on the same day again?8. Emma purchased a new dress for $27.61. How much change will she receive if she pays with a $100 bill?
9. What is the value of 25 — 3.9?

Answers

Answer: 7.) 24 days till he mows both on the same day

8.) $72.39 will be her change

9.). 21.1

Step-by-step explanation:

Are the ratios 3:1 and 16:4 equivalent

Answers

First, simplify the 16:4 ratio.
• 16:4 ÷ 2 = 8:2 ÷ 2 = 4:1

Now, check to see if they're equivalent:
• 3:1 = 4:1 ???
- 3:1 =/= 4:1

So, NO these ratios are not equivalent.

No they are not equivalent 16:4 is like dividing by 4 which is 4:1

Cam's mom dropped him off at a birthday party at 3:16. The party ends at 6:00. How long will Cam be at the party? Please help

Answers

Start by calculating minutes until 4:00. So, from 3:16 to 3:20, there is 4 minutes, then from 3:20 to 4:00 there is 40 minutes. 44 minutes total. Then, from 4:00 to 6:00 there is 2 hours. The total time he is at the party is 2 hours and 44 minutes.

2 hours and 44 minutes

A typist takes 8 minutes to type 360 words.How many minutes will he take to type 225 words?
A. 5 minutes
B. 4 minutes
C. 3 minutes
D. 13 minutes

Answers

Answer:

A. 5 minutes

Step-by-step explanation:

We can solve this question using proportions

Let x be the number of minutes needed to type 225 words.

8 minutes = 360 words

x = 225 words

Cross-multiply

360 × x = 225× 8

360 x = 1800

Divide both-side of the equation by 360

$(360x)/(360)$ = $(1800)/(360)$

(On the left-hand side of the equation, 360 at the numerator will cancel-out 360 at the denominator, while on the right-hand side of the equation 1800 will be divided by 360)

x= 5 minutes

Therefore, it will take 5 minutes to type 225 words

Well, it cant be option B because then it wuld be half the time (180 mins.)

It cant be option D becasue then it would be over 360 mins, seeing that it only took 8 mins to type 360

And it cant be option C beacuse it would be too small, if 4 mins is to small then 3 mins is worse

Your answer would be A 5 minutes it's just a little bit above 4 mins(half)

Other Questions

Name the property that the equation illustrates. Explain. –0.3 + 0.3 = 0 A. Identity Property of Addition; 0 is part of the equation. B. Inverse Property of Multiplication; a number and its inverse are multiplied. C. Inverse Property of Addition; a number and its inverse are added.

Can somebody please help me

Mr.Rivera teaches 6 classes per day. Each class has 15 students. After school , he coaches the baseball team. There are 12 students on the baseball team that do not have his class with him. How many students does Mr.Rivera work with each day.

Alguém sabe como faz essas duas questões ?