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Veseljchak [2.6K]
3 years ago
10

What is equivalent to i4?

Mathematics
1 answer:
bezimeni [28]3 years ago
4 0
Hello : 
 <span>i4 = i²× i² =(-1)(-1) = 1  because : i² = -1</span>
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Y = (x + 2)(x − 3)<br> Find the zero of the function
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Answer:

The zeros are {-2, 3}

Step-by-step explanation:

Set each of these factors equal to zero, in turn, set each factor = to 0 and solve the resulting equation for x:

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The zeros are {-2, 3}

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Recall your d = rt.

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So if the whole trip took 14 hours, say it took "t" hours going upstream, then going downstream it took the slack or " 14 - t ".

Also notice, the trip forth and back is the same 45 miles.

\bf \begin{array}{lccclll}&#10;&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\&#10;&------&------&------\\&#10;Upstream&45&b-2&t\\&#10;Downstream&45&b+2&14-t&#10;\end{array}&#10;\\\\\\&#10;\begin{cases}&#10;45=t(b-2)\implies \frac{45}{b-2}=\boxed{t}\\\\&#10;45=(b+2)(14-t)\\&#10;----------\\&#10;45=(b+2)\left( 14- \boxed{\frac{45}{b-2}}\right)&#10;\end{cases}&#10;\\\\\\&#10;\cfrac{45}{b+2}=14- {\cfrac{45}{b-2}}\implies \cfrac{45}{b+2}=\cfrac{14(b-2)~-~45}{b-2}

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6 0
3 years ago
The ratio of sixth grades to seventh grades in the club of science club is 4:7. If there are 20 sixth grades in the club, how ma
Vika [28.1K]

Answer: 35 seventh graders

Step-by-step explanation:

The simplified ratio is 4:7 sixth graders to seventh graders

The number of sixth-graders is 5 times the number shown in the ratio of attendees (20/4 = 5). Thus, the number of 7th graders must also be 5 times greater than the simplified ratio.

7*5 = 35, thus there are 35 seventh graders in the club

3 0
3 years ago
Read 2 more answers
Indicate whether each of the following fractions is proper or improper. a. 4⁄16 b. 75⁄70 c. 2⁄15 d. 6⁄6
Westkost [7]
75/70 is an Improper Fraction
7 0
3 years ago
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