Add or subtract as indicated and write the result in standard form. 5i - (-5 - i)
1 answer:
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Answer:
2/45
Step-by-step explanation:
0.04... is the same as 0.1 * 0.4... because we are moving it up a decimal place, it's the same as multiplying by ten: we needed to multiply by a tenth to cancel that out. 0.4... is the same as 4/9 and 0.1 is the same as 1/10. We can rewrite the expression above as: . Multiplying the two fractions results in 4/90 which can be simplified to 2/45.
The equations above are all in the format 
, where 
= the gradient, or slope.
So, in the first question,
, the gradient would be 4, because 4 is in this equation (the number before the 
).
The gradient of a line perpendicular to this line is equal to the negative reciprocal of the gradient of the line. A better way to explain it is if = the gradient of the line and <u />
= the gradient of the perpendicular line then:
So in the first question, the gradient of the perpendicular line is
.
So, in the first question,
The gradient of a line perpendicular to this line is equal to the negative reciprocal of the gradient of the line. A better way to explain it is if
So in the first question, the gradient of the perpendicular line is