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bazaltina [42]
3 years ago
7

3x+y=4 write the equation in slope intercept form​

Mathematics
1 answer:
LekaFEV [45]3 years ago
6 0

Answer:

y = -3x + 4

Step-by-step explanation:

sorry im late

but all you have to do is isolate the y

so to do that we have to get rid of the 3x

3x + y = 4

in order to do that we have to subtract 3x from both sides of the equal sign since it is positive and being added to the y

3x + y = 4

-3x          -3x

y = -3x + 4

and now y is isolated

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A country's population in 1993 was 116 million.
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Given that 8 bolts and 6 nuts weigh 138grams and 3 bolts and 5 nuts weigh 71 grams. Find the weight of;(a)one bolt and one nut (
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Step-by-step explanation:

This problem relates to solution of 2 unknowns using simultaneous equations.

Let B be the weight of a single bolt and N be the weight of a single nut

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8B + 6N = 138    (1)

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To solve, we eliminate one of the unknowns by making its coefficients the same and subtracting one from the other

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Multiplying (2) by 6 ===>  18B + 30N = 426    (4)

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So the weight of a single bolt is 12 grams

We can find the weight of a single nut by substituting this value of B into any of the equations (1), (2), (3) or (4) and solving for N. Let's use equation (2)

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So the weight of a single nut is 7 grams

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