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kondaur [170]
3 years ago
8

1.solve the following equation for y 3x- 2y= 6

Mathematics
1 answer:
harkovskaia [24]3 years ago
5 0
So,

For number one, there will be an infinite number of solutions, as there are two placeholders.
3x - 2y = 6
It seems we can use the intercept method.
3x - 2(0) = 6
3x = 6

Divide both sides by 3
x = 2

This is one solution: (2,0)

3(0) - 2y = 6
-2y = 6

Divide both sidees by -2
y = -3

This is another solution: (0,-3)
You should now be able to draw the line.
If you want intercept form for this equation, just manipulate the equation in order to get the y = mx + b form.

Subtract 3x from both sides
-2y = -3x + 6

Divide both sides by -2
y =  \frac{3}{2} x + 6


For the second problem, simply manipulate the equation.
\frac{1}{3} (6x - 9) =  \frac{3}{4} (4x - 8)

Distribute
2x - 3 = 3x - 6

Subtract 2x from both sides
-3 = x - 6

Add 6 to both sides
3 = x


For the third problem, do the same thing.
\frac{3(2x-1)}{4} = x +  \frac{7}{2}

We must first multiply both sides by 4.
3(2x-1) = 4x + 14

Distribute
6x - 3 = 4x + 14

Subtract 4x from both sides
2x - 3 = 14

Add 3 to both sides
2x = 17

Divide both sides by 2
x =  \frac{17}{2} \ or\ 8 \frac{1}{2}
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This week Zara earned AED 25 less than twice the amount she earned last week, x.She earned AED 2875 this week. How much did she
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7 0
3 years ago
Problem number 7 trigonometry
Natasha_Volkova [10]
7) - 1

tan <BAD = BD / AD

BC = √(64 + 36)
BC = √100
BC = 10

now you can solve BD
BD/6 = 6/10
BD = 6*6 / 10
BD = 36/10
BD = 3.6

AD = √36 - 12.96
AD =  √23.04
AD = 4.8

tan <BAD = BD / AD
tan <BAD = 3.6 / 4.8
tan <BAD = 0.75

7) - 2

cos <DAC + cos <DAB

as you know cos = Adj / Hypo

cos <DAC = AD/AC
cos <DAC = 4.8 / 8
cos <DAC = 0.6

cos <DAB = AD / AB
cos <DAB = 4.8/6
cos <DAB = 0.8

so
cos <DAC + cos <DAB = 0.6 + 0.8
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hope it helps


8 0
3 years ago
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