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ratelena [41]
3 years ago
8

Solve the following quadratic equation by rearranging and then factorising x^2 + 7x + 19 = 9

Mathematics
2 answers:
IRISSAK [1]3 years ago
6 0

Answer:

x = -5   & x = -2

Step-by-step explanation:

x^2 + 7x +10 = 0  you takeaway 9 as quadratic equations have to equal 0

(x+5)(x+2) = 0    you find 2 numbers that go into 10 that add to make 7 and multiply to make 10

(x+5) = 0 so x =-5     &   (x+2) = 0 so x =-2

wolverine [178]3 years ago
5 0

Answer:

your lucky you did have a online lessons earlll

Step-by-step explanation:

The following are the temperatures in °C for the first 14 days of January:

-6, -2.5, 2, 2.5, -0.5, 5, 10, -3, -7, 3, -1, 7, 1, 4.5

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pishuonlain [190]

Answer:

59 feet per second

Step-by-step explanation:

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3 years ago
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Please help, I'm trying to finish these
umka2103 [35]

2 x length + 2 x width = perimeter.

2(2s-5) + 2(4s-13) = 108

Simplify:

4s-10 + 8s-26 = 108

Combine like terms:

12s - 36 = 108

Add 36 to both sides:

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Divide both sides by 12:

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s = 12

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8 0
3 years ago
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miss Akunina [59]
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For each sequence, find the first 4 terms and the 10th term<br> 1) 2n-1
Katena32 [7]

Answer:

1st term: 1, 2nd term: 3, 3rd term: 5, 4th term: 7 & 10th term: 19

Step-by-step explanation:

1st term: 2(1) - 1

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2nd term: 2(2) - 1

                4 - 1 = 3

3rd term: 2(3) - 1

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4th term: 2(4) - 1

               8 - 1 = 7

10th term: 2(10) -1

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6 0
3 years ago
Which method is best using this equation 4x-2y=-2,-5x+6y=-15 and why
kipiarov [429]
I think that using the elimination method is the best, because it is the only method that I use when solving these types of equation. For example, for these two equations, you need to multiply one of the equations by a certain number so that you'd be able to find x and y. The elimination method is the method that tells you to do that. It is also the easiest method.

~Hope I helped!~
8 0
4 years ago
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