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mixas84 [53]
3 years ago
10

Solve the following simultaneous equations using an appropriate method.

Mathematics
2 answers:
Dimas [21]3 years ago
7 0

Good evening ,

Look at the photo below for the answer.

:)

Reika [66]3 years ago
6 0

Answer:

a) x = 1 , y = 3

Step-by-step explanation:

a) 7x + 3y = 16

y = 4x - 1

or

3y + 7x = 16 ... (i)

y - 4x = -1 ... (ii)

Solving the simultaneous equation by substitution;

Equation (ii) tells us that y = 4x - 1

Substituting that in (i) gives;

3(4x - 1) + 7x = 16

12x - 3 + 7x = 16

19x = 16 + 3 = 19

x = \frac{19}{19} = 1

y = 4(1) - 1 = 3

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Given the domain {-2, 1, 5}, what is the range for the relation 4x + y = 3?
steposvetlana [31]

Answer:

Step-by-step explanation:

Domain is the set of all possible inputs (x) for the function f(x)

The range is the set of all possible values for that domain

This function is 4x + y = 3 which can be re-written as y = 3-4x

Plug in each of the domain values and you will get the range

For -2 : y = 3-4(-2) = 3 + 8 = 11

For 1:  y = 3-4(1) = -1

For 5: y = 3-4(5) = -17

So range is {-17, -1, 11}  

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2 years ago
Which of these expressions is equivalent to log (20 27)
maria [59]
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3 years ago
A line passes through (2,8) and (4,12) which equation best represents the line
Dmitry [639]

Answer:

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4 0
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Read 2 more answers
Find the measures of the angles a-k.
denis-greek [22]
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b = 72 because 54+54=108 and 180-108=72

c = 108 because b and c are supplemental angles

d = 72 because b and d are corresponding angles

e = 162 because 72+90=162 and definition of a straight line

f = 18 because definition of a straight line

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h = 49.5 because vertical angles and definition of an isosceles triangle

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bcegk = 540
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3 years ago
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