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artcher [175]
3 years ago
10

Smith drives his car and covers 450 miles in 10 hours.

Mathematics
2 answers:
Natali [406]3 years ago
8 0
450/10=540/x and than do cross multiply, 450x=5400 divide both side by 450 = 12 hours
ASHA 777 [7]3 years ago
7 0
450\ miles\ in\ 10\ hours\\\\
540\ miles\ in\ x\ hour\\\\making\ proportion:\\
450-10\\540-x\\\\cross\ multiplication\\\\
450=540*10\\\\
450x=5400\ \ \ \ \ | divide\ by\ 450\\\\
x=12\\\\
It\ will\ take\ 12\ hours.
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According to a recent? study, 8.6?% of high school dropouts are? 16- to? 17-year-olds. In? addition, 5.7?% of high school dropou
Natalija [7]

Answer:

0.6628 or 66.28%

Step-by-step explanation:

The probability that a randomly selected dropout is white, given that he or she is 16 to 17 years old is determined by the probability of them being a white 16 to 17 years old dropout (5.7%), divided by the probability of them being a 16 to 17 years old dropout of any ethnicity (8.6%):

P(W|16\ to\ 17)=\frac{P(W\ and\ 16\ to\ 17)}{P(16\ to\ 17)} =\frac{0.057}{0.086}\\P(W|16\ to\ 17)=0.6628=66.28\%

There is a 0.6628 or 66.28% chance that a randomly selected dropout is white, given that he or she is 16 to 17 years old.

8 0
3 years ago
Read 2 more answers
Write the 5th term in the expansion of (5x-y/2)^7
Nezavi [6.7K]

Answer:

65625/4(x^5)(y²)

Step-by-step explanation:

Using binomial expansion

Formula: (n k) (a^k)(b ^(n-k))

Where (n k) represents n combination of k (nCk)

From the question k = 5 (i.e. 5th term)

n = 7 (power of expression)

a = 5x

b = -y/2

....................

Solving nCk

n = 7

k = 5

nCk = 7C5

= 7!/(5!2!) ------ Expand Expression

=7 * 6 * 5! /(5! * 2*1)

= 7*6/2

= 21 ------

.........................

Solving (a^k) (b^(n-k))

a = 5x

b = -y/2

k = 5

n = 7

Substituting these values in the expression

(5x)^5 * (-y/2)^(7-5)

= (3125x^5) * (-y/2)²

= 3125x^5 * y²/4

= (3125x^5)(y²)/4

------------------------------------

Multiplying the two expression above

21 * (3125x^5)(y²)/4

= 65625/4(x^5)(y²)

5 0
3 years ago
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Answer:

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Step-by-step explanation:

if you split the shape in half vertically you won't get a circle, oval, and triangle isn't even anywhere in that picture.

so using the process of elimination it would have to be the first option. Rectangle.

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Alex_Xolod [135]

Answer:

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