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My name is Ann [436]
2 years ago
14

9x+2+5=15x-8 explain how to solve it

Mathematics
1 answer:
Lelu [443]2 years ago
3 0

Answer:

x = 5/2

Step-by-step explanation:

9x+2+5=15x-8

Combine like terms

9x +7 = 15x -8

Subtract 9x from each side

9x+7 -9x=15x-8-9x

7 = 6x -8

Add 8 to each side

7+8 = 6x-8+8

15 = 6x

Divide by each side

15/6 = 6x/6

5/2 = x

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The following graph shows a proportional relationship.
LenKa [72]

Answer:

2

Step-by-step explanation:

If we look at the graph this is an increasing graph where y increases with respect to x so in other words we can say that y is directly proportional to x.

y\ \alpha\ x\\

and when we remove the proportionality sign we replace it with an equal to sign and a constant. So it becomes ,

y = kx\\

now to find the Constant of proportionality which is k we can use any ordered pair(coordinate/point) from the graph,

Lets take ( 2 , 4) where 2 represents the value of x on the x-axis and 4 represents the value of y on the y-axis so now,

y=kx\\(4)=k(2)\\4=2k\\4/2=k\\k=2\\

so the constant of proportionality is 2

4 0
2 years ago
A pack of 6 batteries of the same type costs £2.79. By caculating the price, per battery, determine if this is better value. You
Fittoniya [83]

Answer:

£0.465. It is a better value.

Step-by-step explanation:

If a pack of 6 batteries costs £2.79, price of a battery can be calculated as shown;

6batteries = £2.79

1 battery = x

x = cost of a battery

6x = £2.79

x = £2.79/6

x = £0.465

Price per battery will be £0.465. This price is a better value since the price is lesser than the cost of the 6batteries (£2.79) in a pack.

6 0
3 years ago
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