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Fantom [35]
3 years ago
15

How to know if you got a one solution

Mathematics
1 answer:
uysha [10]3 years ago
6 0

Answer:

You know you got one solution if when you solve your equation its not for example 5=5 because that's infinite solutions or 5=6 because that's no solution so one solution would be like y=5

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The sum of 8th term of an A.P is 160 while to sum of the 20th term is 880. Find the 43rd term​
marshall27 [118]
Let a and d be the first term and common difference, respectively. Then

the 8th term is a+7d
the 20th term is a+19d

The sum of the first 8 terms is
(a)+(a+d)+(a+2d)+...+(a+7d) = 8a+28d

The sum of the first 20 terms is
(a)+(a+d)+(a+2d)+...+(a+19d) = 20a+190d

So

8a + 28d = 160
20a+ 190d = 880

40a + 140d = 800
40a + 380d = 1760
240d = 960
d = 4

8a + 112 = 160
8a=48
a =
6

The first term is 6 and the common difference is 4.

The 43rd term is a+42d = 6+42(4) = 6+168 = 174

The sum of the first 12 terms is
(a)+(a+d)+(a+2d)+...+(a+11d) = 12a+66d = 12(6)+66(4) = 72+264 = 336
8 0
3 years ago
This set of points is on the graph of a function.
BaLLatris [955]

Answer: (9, -3), (1, -1), (0, 0), and (4, 2)

<u>Step-by-step explanation:</u>

Inverse is when the x's and y's are swapped:

The given points are: {(-3, 9), (-1, 1), (0, 0), (2, 4)}

The inverse points are: {(9, -3), (1, -1), (0, 0), (4, 2)}

3 0
3 years ago
Read 2 more answers
What is the value of i20^i+1?<br><br> A.1<br> B.-1<br> C.-I<br> D.i
Setler79 [48]

Answer:

Step-by-step explanation:

H

6 0
3 years ago
Hello can u please help
Andrei [34K]

y = mx + b

-3 = -2(-5) + b

-3 = 10 + b

-13 = b

y = -2m - 13

The line would pass through -13 on the y-axis and it would go down 2 and move to the right 1 for every new point.

Hope this helps! ;)

6 0
3 years ago
Read 2 more answers
Correct answers only please!
Zina [86]

Answer:

C. 56.2 is correct

Step-by-step explanation:

24.5x = 1378

x =56.24 mph

3 0
3 years ago
Read 2 more answers
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