3 years ago

If x=6 and y=−2, evaluate the following expression:x+y

Mathematics

1 answer:

Triss [41]3 years ago

7 0

Answer:

Step-by-step explanation:

x + y = 6 + (-2) = 4

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What is the solution of this equation? -1/2n2+18=0

SashulF [63]

Answer:

$n=-6\text{ or } n=6$

Step-by-step explanation:

So we have the equation:

$-\frac{1}{2}n^2+18=0$

Subtract 18 from both sides. The left cancels:

$-\frac{1}{2}n^2=-18$

Multiply both sides by -2. The left cancels again:

$n^2=36$

Take the square root of both sides:

$n=\pm\sqrt{36}$

Since we're taking the square root, we need to use plus-minus.

Evaluate:

$n=\pm 6$

So, the solutions are -6 or 6.

5 0

3 years ago

Which is greater 16/12 or 9/3

zavuch27 [327]

Answer:

$\frac{16}{12} \: \: < \frac{9}{3}$

9/3 is greater

Step-by-step explanation:

$\frac{16}{12} \: \: \: \: \: \: \: \: \: \: \frac{9}{3} \\ \frac{16}{12} \: \: \: \: \: \: \: \: \: \: \frac{9 \times 4}{3 \times 4} \\ \frac{16}{12} \: \: \: \: \: \: \: \: \: \: \frac{36}{12} \\ \frac{16}{12} \: < \: \frac{36}{12} \\ \\ so \\ \frac{16}{12} < \frac{9}{3}$