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Rashid [163]
3 years ago
7

If you spin the spinner 50 times, how many times do you expect it to land on 10?

Mathematics
2 answers:
Eddi Din [679]3 years ago
5 0

supposed the spinner is fair

Step-by-step explanation:

=then the probability of landing on 4 will be 1/4

= number of times spinner will land on 4 1/4×50

= 12.5 times ,which you can round off to 13 times

Tasya [4]3 years ago
4 0
13 times 12.5 but rounded
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Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite
yarga [219]

Answer:

<em>Rajan must use </em><em>0.75</em><em> liters of 5% hydrochloric acid solution and </em><em>0.25</em><em> liters of 45% hydrochloric acid solution.</em>

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

x+y=1

i.e x=1-y --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

0.05x+0.45y=1\times 0.15

i.e 5x+45y=15 -------------2

Putting value of x from equation 1 in equation 2,

\Rightarrow 5(1-y)+45y=15

\Rightarrow 5-5y+45y=15

\Rightarrow 5+40y=15

\Rightarrow 40y=15-5=10

\Rightarrow y=0.25

Putting the value of y in equation 1,

x=1-0.25=0.75

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

5 0
3 years ago
Simplify. (3 + 2) + (4 + 3) =
Gala2k [10]

Answer:

5 + 7

Step-by-step explanation:

3 + 2 = 5, 4 + 3 = 7

5 0
3 years ago
Read 2 more answers
Which are linear and nonlinear?
Nostrana [21]
All but the first should be linear. Im questionable about the last one but the other 2
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It is customary to give a 15% tip for a meal at a restaurant. what is 15% of $64.40
alex41 [277]

Answer:

$9.66 isb15% of $64.40

Step-by-step explanation:

64.40×15%

7 0
1 year ago
Algebra please help(no links)
lesya [120]

Answer:

i can't help with this specific queshtion  but i do have tow say to things 1. when you post something like this make sure to crop out anything that people can see your info or anything like block out the tabs someone could see that and use it for evil be careful with this, second i do aleks to.

 

Step-by-step explanation:

im sorry i could not help you in the way you wanted but i hop you will be safe now!

dont make me brainlyest i dont deserve it i did not give you you answer

Have a nice day!

5 0
3 years ago
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