Answer and explanation please?? #6

Mathematics

2 answers:

iren [92.7K]3 years ago

8 0

Since 3 poles is $120 and 4 poles is $160
you can find the difference between the two to find the price of one pole

160-140 = 20

each pole is $20

you can then do the equation

$120 = 20(3)+ y

3 being the amount of poles and y being the fee added to it.

120 = 60 + y

y = 60

so the final answer would be c = 20n + 60

Dafna1 [17]3 years ago

4 0

The answer would be C .

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Which of the following graph represents the equation y-2=3(x-1)

pshichka [43]

Answer with explanation:

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y-a=m (x-b)

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It will cut x axis and y axis at , $(\frac{1}{3},0) \text{and} (0,1)$ respectively.

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Graph B

6 0

3 years ago

Need to show my work

dalvyx [7]

Answer:

$\large\boxed{x=\dfrac{5}{4},\ y=\dfrac{15}{16}}$

Step-by-step explanation:

$\left\{\begin{array}{ccc}y=\dfrac{3}{4}x&(1)\\\dfrac{5}{2}x+2y=5&(2)\end{array}\right\\\\\text{Substitute}\ (1)\ \text{to}\ (2):\\\\\dfrac{5}{2}x+2\left(\dfrac{3}{4}x\right)=5\\\\\dfrac{5}{2}x+\dfrac{3}{2}x=5\\\\\dfrac{5+3}{2}x=5\\\\\dfrac{8}{2}x=5\\\\4x=5\qquad\text{divide both sides by 4}\\\\x=\dfrac{5}{4}$