Answer:
The answer is
-148.576
{-2x + 7y = -5
{-2x - 4y = 6 | · (-1)
{2x + 4y = -6 (+)
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-2x + 2x + 7y + 4y = -5 + (-6)
11y = -11 | : 11
y = -1
{y = -1
{2x + 4y = -6
{2x + 4 · (-1) = -6
{2x - 4 = -6 | + 4
{2x = -2 | : 2
{x = -1
2.1 * 10 ^3
Step-by-step explanation:
5.67 * 10 ^7 ÷2.7 x 10^4
Divide the numbers
5.67 / 2.7 =2.1
Divide the exponents
10^7 / 10 ^4
Remember when dividing power, we subtract the exponents
10 ^(7-4) = 10^3
Put this back together
Verify that this is in scientific notation
Since this is in scientific notation, we are done
this is hard
so just try
