Answer:
Step-by-step explanation:
Add the above equations we get
6x=12
x=2
2+3y=-4
3y=-6
y=-2
<span>7 Indian Rupee equals </span><span>0.115 <span>US Dollar that is your answer</span></span> hope im right
<span>75 miles per hour
miles under miles and hours and hours
</span><span>75 miles -------------->1 hour
</span>30 miles ---------------->?? nhours
cross multiplication
n = 30*1/75 = 0.4 hours = 0.4 x 60= 24 minutes
b. It depends on the value you assume for the power line voltage. If you assume it is 120 volts, then the ratio to battery voltage is
... (120 volts)/(1.2 volts) = 100
Power line voltage is 100 times as large as battery voltage.
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Please be aware of some difficulties in this question.
1. Power line voltage, even if it is "120 volts" varies over time from -170 V to +170 V, so is not really comparable to a battery's voltage, which is steady at 1.2 V.
2. The terminology "times larger" is ambiguous. When we answer the question, "how much larger is <em>a</em> than <em>b</em>," we give the response in terms of the difference a-b. Thus, if <em>a</em> is 2 times <em>larger</em> than <em>b</em>, we might be talking about the <em>difference</em> being twice the value of <em>b</em>. It is preferable to say "times as large as."
