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3 years ago

Alex has $8.75 in dimes and quarters in a jar. If he has 65 coins, how many quarters are in his jar?

Mathematics

1 answer:

Ksju [112]3 years ago

7 0

He has 15 quarters because
3.75 ÷ 0.25 = 15 = 15 quarters
10 × 10 = 50 dimes = 5

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Find the probability that when a couple has three children, at least one of themis a girl. (Assume that boys and girls are equal

kvv77 [185]

Answer: $\bold{\dfrac{7}{8}=87.5\%}$

<u>Step-by-step explanation:</u>

"At least one girl" means P(1 girl) + P(2 girls) + P(3 girls) or 1 - P(all boys)

I will use the latter: 1 - P(all boys)

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3 years ago

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dmitriy555 [2]

D
Divide the whole thing by 2
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3 years ago

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3. A kite is aloft at the end of a 1500 foot string. The string make an angle of 43° with the

sineoko [7]

Answer:

$h= 1500\,*\,sin(43^o)$

Step-by-step explanation:

Notice that there is a right angle triangle formed with sides as follows:

hypotenuse is the actual 1500 ft string. The acute angle 43 degrees is opposite to the segment that represents the height of the kite from the ground. Therefore, the trigonometric ratio that we can use to find that opposite side to the given angle, is the sine function as shown below:

$sin(43^o) = \frac{opposite}{hypotenuse} \\sin(43^o) = \frac{opposite}{1500}\\opposite = 1500\,*\,sin(43^o)\\h= 1500\,*\,sin(43^o)$

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3 years ago

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frutty [35]

Answer:

(-2,2)

Step-by-step explanation:

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