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3 years ago

5

Mary has 3 red marbles and 7 yellow marbles in a bag. What is the probability of she draw 3 marbles at the same time, all of the

m are red marbles?

1 answer:

LenaWriter [7]3 years ago

3 0

The probability would be 3/10 or 30%

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I need help with this problem

Arada [10]

Answer:

65.56°

Step-by-step explanation:

We know that if we take dot product of two vectors then it is equal to the product of magnitudes of the vectors and cosine of the angle between them

That is let p and q be any two vectors and A be the angle between them

So, p·q=|p|*|q|*cosA

⇒ $cosA=\frac{u.v}{|u||v|}$

Given u=-8i-3j and v=-8i+8j

$|u|=\sqrt{(-8)^{2}+ (-3)^{2}} =8.544$

$|v|=\sqrt{(-8)^{2}+ (8)^{2}} =11.3137$

let A be angle before u and v

therefore, $cosA=\frac{u.v}{|u||v|}=\frac{(-8)*(-8)+(-3)*(8)}{8.544*11.3137} =\frac{40}{96.664}$

⇒ $A=arccos(\frac{40}{96.664} )=arccos(0.4138 )=65.56$

Therefore angle between u and v is 65.56°

5 0

2 years ago

Which is the sum of two or more different monomials?

Ne4ueva [31]

Answer: Polynomial

Step-by-step explanation:

8 0

2 years ago

Tulio will invest $1,000,000 at 5% annual interest. Determine how much money will Tulio have after 10 years if the interest is

balu736 [363]

Answer:

$1,500,000

Step-by-step explanation:

Given

Principal = $1,000,000

Rate = 5%

Time = 10years

Interest = PRT/100

Interest = 1000000*5*10/100

Interest = 100000*5

Interest = $500,000

Amount after 10years = $1,000,000+ $500,000

Amount after 10years = $1,500,000

5 0

3 years ago

3) Rita has 3/4 m of Ifugao cloth. She used 2/3 m for placement. What part

enot [183]

Answer:

$Unused = \frac{1}{12}m$

Step-by-step explanation:

Given

$Total= \frac{3}{4}m$

$Used= \frac{2}{3}m$

Required

Determine the part left

The part left is calculated using:

$Used + Unused = Total$

$Unused = Total - Used$

$Unused = \frac{3}{4}m - \frac{2}{3}m$

Take LCM

$Unused = \frac{9m - 8m}{12}$

$Unused = \frac{1m}{12}$

$Unused = \frac{1}{12}m$

6 0

2 years ago

Jo Bob’s gyro truck sold 114 gyros for lunch on Wednesday. The driver sold 98 gyros at the first stop. At the next stop, the Jon

bazaltina [42]

Answer:

they pay $17.92

Step-by-step explanation:

114-98=16

16÷2=8

8×2.24=17.92

7 0

3 years ago