Please help number 42

Mathematics

2 answers:

Ratling [72]3 years ago

7 0

Answer:

All I know

Step-by-step explanation:All I know is that you have to distribute the top so 5{2k - 3} so that would be 10k-15 and then -3{k+4} would be -3k -12 hopefully this helps you out a littble bit so the top completely is 7k-27

cricket20 [7]3 years ago

6 0

Answer:

41/4 = 10.25

Step-by-step explanation:

Put -2 where k is and do the arithmetic.

$\dfrac{5(2k-3)-3(k+4)}{3k+2}=\dfrac{5(2(-2)-3)-3(-2+4)}{3(-2)+2}\\\\=\dfrac{5(-4-3)-3(2)}{-6+2}=\dfrac{5(-7)-6}{-4}=\dfrac{-35-6}{-4}\\\\=\dfrac{41}{4}=10.25$

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What is 2 times 3 times n times n = 54

kolezko [41]

If I'm reading this correctly, it is 2*3*n*n = 6n^2

6n^2 = 54 Divide by 6

n^2 = 54/6

n^2 = 9 Take the square root of both sides.

sqrt(n^2) = sqrt(9)

n = +/- 3

n = + 3 or n = -3. Both will solve the equation above.

Edit

2 * 3 * n * n

Let n = 3

2 * 3 * 3 * 3 = 6 * 9 = 54

The other value is n = - 2

2 * 3 * n * n

2 * 3 * (-3) * (-3) A minus times a minus is a plus.

2 * 3 * 9 = 6 * 9 = 54

both + 3 and - 3 for n will give 54.

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Fofino [41]

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2 years ago

Evaluate.

lys-0071 [83]

Answer:

361/900

Step-by-step explanation:

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