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densk [106]
2 years ago
6

Sebastian buys a gift which costs £18.20 He pays with a £20 note. (a) How much change does he receive?​

Mathematics
1 answer:
Triss [41]2 years ago
5 0

Answer:

1.80

Step-by-step explanation:

i think

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If y varies directly as x and y = 24 when<br> x= 16, what is y when x = 50?
mars1129 [50]

Answer:

y = 75

Step-by-step explanation:

Given

y\ \alpha\ \ x

y=24; x =16

Required

Find y when x = 50

We have:

y\ \alpha\ \ x

Express as equation

y = kx

Solve for k

k = \frac{y}{x}

When y=24; x =16

k = \frac{24}{16}

k = \frac{3}{2}

When x = 50, we have:

y = kx

y = \frac{3}{2} * 50

y = 75

3 0
3 years ago
Zak takes 3 steps for every 2 steps Rich takes. How many steps will zak take if rich takes 18 steps? Explain how you found the a
vodka [1.7K]
To solve this problem we can think of a rule of three.
 Writing the rule of three we have:
 3 ---> 2
 x ----> 18
 Clearing the value of x
 x = ((18) / (2)) * (3) = 27
 answer
 zak will take 27 steps if rich takes 18 steps
7 0
3 years ago
Help me out plz.........<br>​
Aleks [24]

Answer: try 5/6 hope this helps you out

Step-by-step explanation:

8 0
3 years ago
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Tom determines the system of equations below has two solutions, one of which is located at the vertex of the parabola.
Rus_ich [418]

Answer:

b must equal 7 and a second solution to the system must be located at (2, 5).

Step-by-step explanation:

Rearranging the first equation:

y = (x - 3)^2 + 4

From this we see that the vertex is at the point (3,4).

So one solution of equation 2 is (3 ,4).

Substituting in equation 2:

4 = -3 + b

b = 7.

So equation 2 is y = - x + 7.

Now we check if  (2, 5) is on this line:

5 = -2 + 7 = 5 , therefore  (2, 5) is on this line.

Verifying if (2, 5)  is also on y = (x - 3)^2 + 4:

5 = (2 - 3)^2 + 4 =  1 + 4 = 5

- so it is. and a second solution to the system is (2, 5).

5 0
2 years ago
16) Which of the following best represents the
Nostrana [21]
I think it is B because it has a continuous line soy it couldn’t be a. It has negative numbers so it couldn’t be D. And it has negative numbers so couldn’t be C
4 0
3 years ago
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