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earnstyle [38]
3 years ago
5

Work out the value of 4(2x+3y) when x=8 and y=-3

Mathematics
1 answer:
meriva3 years ago
8 0
4(2 x 8 + 3 x (-3))
4(16 + (-9))
4(7)
=28

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3x+6/x^2-x-6+2x/x^2+x-12
Tanzania [10]
\dfrac{3x+6}{x^2-x-6} +  \dfrac{2x}{x^2+x-12}

= \dfrac{3(x+2)}{(x + 2)(x - 3)} +  \dfrac{2x}{ (x - 3)(x + 4)}

= \dfrac{3}{(x - 3)} +  \dfrac{2x}{ (x -3)(x + 4)}

= \dfrac{3(x+4)}{(x - 3)(x + 4)} +  \dfrac{2x}{ (x -3 )(x + 4)}

= \dfrac{3(x+4) + 2x }{(x - 3)(x + 4)}

= \dfrac{3x+12 + 2x }{(x - 3)(x + 4)}

= \dfrac{5x+12}{(x - 3)(x + 4)}



6 0
3 years ago
Y = -12 when<br> x = -3 ,<br> find y when<br> x = -1 .
Juliette [100K]

Answer:

y=-4

Step-by-step explanation:

If y=4x

and y=-1

y=-1×4

y=-4

7 0
3 years ago
Simplify this ratio 10 feet/30 inches
Deffense [45]

Answer:

1 feet/3 inches

7 0
2 years ago
Reasoning Kareem cannot decide which of two washing machines to buy. The selling price of each is $720. The first is marked down
Marina CMI [18]

Answer:

store one

Step-by-step explanation:

Store One:

$720(0.50)=$360

$720-$360=$360

Store Two:

$720(0.30)=$216

$720-$216=$504

$504(0.20)=$100.8

$504-$100.8=$403.2

5 0
3 years ago
125. Albert surveyed a class of 25 students on sports. 5 kids love baseball. 7 kids love basketball. 10 kids
MAXImum [283]

Answer:

3 students

Step-by-step explanation:

since the<em> </em>total number of students is 25,when you add those that like baseball, basketball and football the total number must be 25 but in this case it's 22 meaning 2 student liked neither.

7+5+10+x=25

x=25-22

=3

I hope this helps

4 0
3 years ago
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