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3 years ago

2x+6y=4 X-6y=29 Help

1 answer:

4 0

$\begin{cases}2x + 6y = 4 \\x - 6y = 29 \end{cases} \\ \Leftrightarrow \begin{cases}3x = 33 \\y = \frac{x - 29}{6} \end{cases} \\ \Leftrightarrow \begin{cases}x = 11 \\y = \frac{11 - 29}{6} = - 3 \end{cases}$

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There are 11 students on the tennis team. The coach selects 3 of them to go to atennis clinic. In how many ways can he choose 3

Komok [63]

Answer:

165 ways

Step-by-step explanation:

Selection deals with combination

There are a total of 11 from which 3 are to be selected

11C3 = 11!/3!(11-3)!

= 11!/(3!x8!)

=(11x10x9x8!)/(3x2x8!)

=11x10x9/6

=11x5x3 = 165 ways

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3 years ago

I need help with this

MrRissso [65]

Answer:

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Which of the following would be considered an INDEPENDENT event?

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4 years ago

5. A ball is thrown straight up leaving the player's hands at at 7.5 m/s. If air resistance is ignored, how high can the ball tr

aleksley [76]

The maximum height reached is 2.87 meters

<h3>What is maximum height?</h3>

The maximum height of an object is the highest vertical position along the trajectory of the object.

The given parameters are:

$u = 7.5ms^{-1}$ --- the initial velocity
$v = 0ms^{-1}$ --- the final velocity
$a =-g$ --- the acceleration

To calculate the height (s) of the ball, we make use of the following equation of motion:

$v^2 = u^2 + 2as$

Substitute known values

$0^2 = 7.5^2 - 2gs$

$0 = 56.25 - 2gs$

Collect like terms

$2gs = 56.25$

Substitute 9.8 for g

$2 \times 9.8 s = 56.25$

$19.6 s = 56.25$

Divide both sides by 19.6

$s = 2.87$

Hence, the maximum height reached is 2.87 meters

Read more about acceleration and maximum height at:

brainly.com/question/14638187

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3 years ago