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KiRa [710]
3 years ago
13

1. solve the following pair of simultaneous equations.

Mathematics
2 answers:
ruslelena [56]3 years ago
6 0
From equation 1 e=23-6f
sub 1 into 2. 2(23-6f)-f=7
46-12f-f=7
46-7-12f-f=0
39-11f=0
39=11f
then u divide both side by 11
therefore f=3.55
subtitude f in 1
6(3.55)+e=23
21.3+e=23
e=23-21.3
e=1.7
Arisa [49]3 years ago
4 0
1.7 is the correct answer.
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Step-by-step explanation:

The center of a circle with 2 end points of a di diameter is the midpoint of the two endpoints.

The formula needed to find the minpoints is

(x,y) = (x2 + x1)/2, (y2 + y1)/2

x2 = 3

x1 = 3

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y1 = -7

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The midpoint is the center of the circle. Observe that the signs get changed when entering the values for (x,y)

So far what you have is (x - 3)^2 + (y + 3.5)^2 = r^2

To determine r^2 you need only take the distance from the center to oneof the endpoints.

r^2 = (3 - 3)^2 + (3.5 - 0)^2

r^2 = 3.5^2

r^2 = 12.25

Answer: (x - 3)^2 + (y + 3.5)^2 = 12.25

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3 years ago
Solve for c: a=7b+8c+9d-10
polet [3.4K]
<span>a=7b+8c+9d-10
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lapo4ka [179]
I'm gonna say A. It makes the most sense to me.
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Step-by-step explanation:

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steposvetlana [31]

Answer: x = 11

Step-by-step explanation:

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<em>Hope it helps <3</em>

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