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zmey [24]
3 years ago
7

Seven weightlifters are competing in the dead-lift competition. In how many ways can the weightlifters finish first, second, and

third ( no ties)?
Mathematics
1 answer:
Airida [17]3 years ago
7 0
I think the answer is 21 you just multiply the number of weightlifters by the number of places so 7 x 3.
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For every 6 boys in the class there are 4 girls. If there are 42 more boys than girls, how many girls are there in the class?
Mandarinka [93]

Answer:

28

Step-by-step explanation:

you would divide 42 by 6 which is 7 and than multiply 7 by 4 which would get you 28

4 0
3 years ago
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An assembly line worker at rob bicycle factory adds a seat to a bicycle at a rate of 2 seats every 12 minutes write and solve a
Arturiano [62]

Answer:

6N = T

They will take 96 minutes to add 16 seats.

Step-by-step explanation:

In the factory, the workers add bicycle seats at a rate of 2 seats every 12 minutes.

If the number of seats they add is N and the number of minutes it takes is T, then they are proportional i.e. N ∝ T.

⇒ N = kT ........... (1)

Now, N = 2 for T = 12 minutes.

So, from equation (1), 2 = 12k

⇒ k = \frac{1}{6}

Therefore, the equation (1) becomes N = \frac{1}{6}T

⇒ 6N = T ......... (2)

Now, for N = 16, from equation (2) we get,

T = 16 × 6 = 96 minutes.

Therefore, they will take 96 minutes to add 16 seats. (Answer)

5 0
3 years ago
The gradient of the curve
AleksAgata [21]

Answer:

<u>Coordinate</u><u> </u><u>of</u><u> </u><u>P</u><u> </u><u>is</u><u> </u><u>(</u><u>-</u><u>2</u><u>,</u><u> </u><u>-</u><u>3</u><u>)</u>

Step-by-step explanation:

Gradient is the derivative of the curve:

y = {3x}^{2} + 11x + 7 \\  \\  \frac{dy}{dx}  = 6x + 11

but dy/dx is -1 :

6x + 11 =  -  1 \\ 6x =  - 12 \\ x =  - 2

substitute for x :

y = 3( - 2) {}^{2}  + 11( - 2) + 7 \\ y =   - 3

3 0
3 years ago
At the end of the month, Bill had overdrawn his checking account and had a balance of -$163.22 . He deposited his paycheck of $9
MissTica

Answer:

$825.34

Step-by-step explanation:

$988.56 - $163.22

$825.34

4 0
3 years ago
What is the product 6* [4, -2, 1, 7, 3, 0]
almond37 [142]

Answer:

[24, -12, 6, 42, 18, 0]

Step-by-step explanation:

Multiply each term in this 1 by 6 row matrix by 6:

[24, -12, 6, 42, 18, 0]

7 0
3 years ago
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