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Nikolay [14]
3 years ago
10

Simplify 3j - {2k - [5h - (3j k)]}.

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
4 0
Start with the ()
5h-3j-k since you cant add any further u just multiple the second neg in the []

-5h+3j+k+2k you can add ONLY the K

-5h+3j+3k now multiply the neg again this time tih the {}

3j+5h-3j-3k The 3J is canceled out b/c 3j-3j=0
Giving you a total of 5h+3k
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Which of the following is an irrational number?
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Step-by-step explanation:

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Jeb is the local tennis pro at the country club, and he needs to know at what height the tennis ball needs to be when he hits it
suter [353]

Answer:

The height from ground, at which Jeb needs to hit the ball is 7.8 meters

Step-by-step explanation:

The given parameters are;

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The time it takes the ball to reach the net, tₓ ≈ 1.24 seconds

The height, hₓ the ball falls in 1.24 seconds is given as follows;

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The height the ball falls in the time taken to reach the net from 20 meters = The height, hₓ the ball falls in 1.24 seconds

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4 0
3 years ago
What are the zeros of the function represented by the quadratic expression 2x^2-5x-3
emmasim [6.3K]
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Two solutions were found :

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Step by step solution :

Step  1  :

Equation at the end of step  1  :

(2x2 - 5x) - 3 = 0

Step  2  :

Trying to factor by splitting the middle term

 2.1     Factoring  2x2-5x-3 

The first term is,  2x2  its coefficient is  2 .
The middle term is,  -5x  its coefficient is  -5 .
The last term, "the constant", is  -3 

Step-1 : Multiply the coefficient of the first term by the constant   2 • -3 = -6 

Step-2 : Find two factors of  -6  whose sum equals the coefficient of the middle term, which is   -5 .

3 0
3 years ago
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Natalka [10]
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