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LekaFEV [45]
3 years ago
8

3x+2y=1 x+y=8 Solve for x and y. the equations correspond

Mathematics
1 answer:
sukhopar [10]3 years ago
4 0

3x + 2y = 1 -----1

x+y=8--------2

x=8 - y ------3

subs 3 into 1

3(8-y) + 2y=1

24-3y + 2y = 1

24-y = 1

-y= 1-24

-y= -23

y= 23

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John works Monday to Friday. He buys his lunch on his way to work. Each day John buys a sandwich, a bottle of water and a bag of
kipiarov [429]

Complete question

Shop A _________________ shop B £3

Any sandwich - £2.85 ___ sandwich, water crisp

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A bag of crisp - 85p

Answer:

£6.50, John is incorrect

Step-by-step explanation:

Number of working days = 5 = number of days meal is purchased

Total cost per meal, shop A :

£(2.85 + 0.60 + 0.85) = £4.3

Total cost for the week = 4.3 * 5 = £21.50

Total cost per meal cost Shop B = £3

Total cost for the week = 3 * 5 = £15

Difference :

£21.50 - £15 = £6.50

Hence, Amount John saves by buying from shop B is £6.50

Numbe

4 0
3 years ago
Alexander makes a model of the Great Pyramid of Giza with the dimensions shown.
Leviafan [203]

Answer:

The area of the square base is 100 in.2.

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Step-by-step explanation:

I dan't have an explanation I just guessed.

7 0
4 years ago
0 0
morpeh [17]

Answer:

a) slope / m = 3

b) y-intercept / b = 0

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Step-by-step explanation:

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3

b)

y = mx + b

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c)

Proportional is when it crosses origin ( 0, 0 ).

Not proportional is when it does not cross origin.

Hopefully this helps!

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3 years ago
5x − 3y = −11<br> 2x − 6y = −14
Digiron [165]
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3 years ago
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Andreas93 [3]

Step-by-step explanation:

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3 years ago
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