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chubhunter [2.5K]
3 years ago
12

Kelly practiced her flute for 30 minutes a day for 9 days. How many total minutes did she practice?

Mathematics
2 answers:
Lesechka [4]3 years ago
7 0
she practice 270 minutes
Whitepunk [10]3 years ago
6 0
If you multiply 30 times 9, the answer would result in 270 minutes. (does it say hours?)
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Alessandro currently has $2,400 in his savings account. He saves $250 per month. Bea currently has $1,750 in her account. She sa
dusya [7]
Bea will have $540 more than Alassandro after 12 months
5 0
3 years ago
Read 2 more answers
A container holds 9 red markers, 13 blue markers, and 17 green markers. You will randomly select two markers without replacement
IRISSAK [1]

Answer:

a.

                         R-------8/38--------RR

R------9/39--------B-------13/38-------RB

                          G------17/38--------RG

                          R-------9/38--------BR

B--------13/39------B-------12/38-------BB

                           G-------17/38-------BG

                             R-----9/38--------GR

G---------17/39-------B------13/38-------GB

                              G------16/38-------GG

b).

  • 9 ways
  • ways you can select 1 blue are; RB,BR,BG,GB

RB=9/39 × 13/38=3/38

BR= 13/39 × 9/38 =3/38

BG= 13/39 × 17/38=17/114

GB= 17/39 × 13/38=17/114

=3/38 +3/38+17/114+ 17/114 =26/57

  • Probability of selecting 2 red markers= RR = 9/39 × 8/38 =12/247

  • Probability of selecting a green marker and then a red marker= GR= 17/39×9/38 =51/494

8 0
4 years ago
Pls help i will give brainliest
Novosadov [1.4K]
<h3>Answer:   -a > -b</h3>

Explanation:

Let's go over an example.

We'll have a = 1 and b = 7 which makes a < b true. Feel free to pick your own favorite pair of numbers such that b is larger than 'a'.

The corresponding opposites are:  -a = -1 and -b = -7

The relationship flips because the opposites of each number are flipped. So instead of saying -a < -b, we have -a > -b

Sure enough, -1 > -7 is a true statement. Use a number line to see this. I recommend a vertical number line.

In short, going from a < b to -a > -b means we flip the signs of each term, and we flip the inequality sign as well.

4 0
2 years ago
Help pleasee!!!!!!!!
Whitepunk [10]

Answer:

14.2 ounce bottle

Step-by-step explanation:

the 14.2 ounce bottle Is 2 cents cheaper per ounce

5 0
3 years ago
Read 2 more answers
A manufacturer of cereal has a machine that, when working properly, puts 20 ounces of cereal on average into a box with a standa
IceJOKER [234]

Answer:

Step-by-step explanation:

Given

mean \mu =20\ ounces

standard deviation \sigma =1\ ounce

The no of sample boxes weigh Every morning is 25

Average weight is 1 % more than average

i.e. 20+20\times 0.1=20.2 ounce

The company re-calibrates the machine

P\left ( \bar{x}> 20.2\right )=P\left ( z-\frac{20.2-20}{\frac{1}{\sqrt{25}}}\right )

=P\left ( z> 1\right )=1-P\left ( z\leq 1\right )

=1-0.8413

=0.1587

Therefore the Probability that the average weight of box is more than 20.2 ounce is 0.1587

No of days the machine is expected to re-calibrate is 100\times 0.1587=16\ days

8 0
4 years ago
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