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emmasim [6.3K]
2 years ago
10

5. 2x+y=8 ly=X-7 plz help plzzz​

Mathematics
2 answers:
ELEN [110]2 years ago
6 0

Answer:

x=5,y=-2 or (5,-2)

Step-by-step explanation:

Here is the system of equations:

2x+y=8

y=x-7

Since we have y isolated by itself in the second equation, let's use substitution.

Substitute x-7 as y into the first equation

2x+x-7=8

combine like terms

3x-7=8

add 7 to both sides

3x=15

divide by 3

x=5

now substitute 5 as x into one of the equations to find the value of y

for example let's use y=x-7

y=5-7

y=-2

so x=5, y=-2

as a point it's (5,-2)

Hope this helps! :)

Grace [21]2 years ago
5 0

Answer:

x=5 y=-2 (5,-2)

Step-by-step explanation:

2x+x-7+8

3x-7=8

3x=15

x=5

for y

y=-2x+8

y=-2(5)+8

y=-10=8

y=-2

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The amount he should sell for one bottle of the fizzy juice to make the 60% profit is 22 Penny.

<h3>Cost of each juice</h3>

Orange :  Lemonade

  3  :  5

After buying 2 liters of orange juice and 3 liters of lemonade, cost of each;

Increase the ratio to form divisible by 2 and 3; (L.C.M of 2 and 3 = 6)

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total fizzy juice = 18L + 30L = 48 liters

bottle of orange = (18 L ÷ 2 L) = 9 bottles

bottle of lemonade = (30 L ÷ 3L ) = 10 bottles

cost of orange = 9 x £1.20 = £10.8

cost of lemonade = 10 x £1.50 = £150

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<h3>Total bottles that will make 48 liters fizzy juice</h3>

250 mL = 0.25 L

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<h3>Amount each bottle should be sold to make a profit of 60%</h3>

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If $10,000 is invested at a rate of 2.5 percent for 5 years, how much money is in the account at
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Answer:

$8,750

Step-by-step explanation:

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