Cheddar cheese costs £7.50 per 1kg marie buys 200 grams of cheddar cheese how much does she pay?

1 answer:

8 0

£. 15 or $. 19 because €7.5 is 1,000 grams so I divided 7.5 by 100 then multiply it by 2 which is €. 15 euro or $. 19 usd

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A store sells almonds for $7 per pound, cashews for $10 per pound, and walnuts for $12 per pound. A customer buys 12 pounds of m

pshichka [43]

The complete question in the attached figure

Let
x-------------> pounds of almonds-------> ($7 per pound)
y-------------> pounds of cashews-------> ($10 per pound)
z-------------> pounds of walnuts-------> ($12 per pound)

we know that
x+y+z=12---------------> equation 1
7x+10y+12z=118---------> equation 2
z=2+y--------------------> equation 3

replacing equation 3 in 1 and 2
x+y+(2+y)=12----------> x+2y=10--------> equation 4
7x+10y+12*(2+y)=118--> 7x+10y+24+12y=118--> 7x+22y=94 --> equation 5

using a graph tool-----> to resolve the system of equations
see the attached figure

the solution is the point (4,3)
x=4
y=3
z=2+y-----> z=2+3-------->z=5

pounds of almonds are 4
pounds of cashews are 3
pounds of walnuts are 5

therefore

the answer is the option
a. The customer buys 1 more pound of walnuts than almonds and 1 more pound of almonds than cashews