Elliot buy 1 tea and 2 coffees for £3. Elise buy 2 teas and 1 coffee for £2.25.
Work out the cost of one tea and one coffee.
tea: £
O coffee: £

tea: £0.5

              coffee: £1.25

Step-by-step explanation: Let's represent the cost of tea as t and the cost of coffee as c.

Elliot bought two coffees and one tea and paid £3, i.e.,

t + 2c = 3

Elise paid £2.25 for two teas and one coffee, or:

2t + c = 2.25

The system of equations to solve are

t + 2c = 3 (1)

2t + c = 2.25 (2)

One way to solve this system is by substitution:

t = 3 - 2c (3)

Using (3) to substitute in (2):

2(3 - 2c) + c = 2.25

6 - 4c + c = 2.25

- 3c = - 3.75

c = 1.25

Now, to determine t, we can use (1) or (3).

As it is easier, we use (3):

t = 3 - 2(1.25)

t = 0.5

The cost of 1 coffee and 1 tea is £1.25 and £0.5, respectively.

7

step-by-step explanation:

yuo ned the activity or vertical angle of the form of 1,7 but 2,2 has a c4,2 as it verticie so i not have a car

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3