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2 years ago

Sally is now 10 years older than Suki. 5 years ago, the sum of their age was 40. How old are they now?

Mathematics

2 answers:

Nikitich [7]2 years ago

7 0

Answer:

Sally is 30 and Suki is 20

Step-by-step explanation:

x = Sally's age

y = Suki's age

x = 10 + y

(x - 5) + (y - 5) = 40

x = 30, y = 20

Travka [436]2 years ago

4 0

Sally is 45 and suki is 35

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Robert makes 50 litres of green paint by mixing litres of yellow paint and litres of blue paint in the ratio 2:3.

podryga [215]

Answer:

Explanation:

1. Cost of each liter of yellow paint:

Yellow paint is sold in 5 litre tins and ach tin costs £26, thus the cost of one liter is £26 / 5 liters = £5.2 per liter.

2. Cost of each liter of blue paint:

Blue paint is sold in 10 litre tins and each tin costs £48, thus the cost of one liter of blue paint is £48 / 10 liters = £4.8 per liter

3. Cost of each liter of green paint.

Green paint is made by mixing yellow paint and blue paint in the ratio 2:3

Thus, 5 liters of green paint will cost:

2 liters yellow paint: 2 liter × £5.2 / liter = £10.4

3 liters blue paint: 3 liter × £4.8 / liter = £14.4

========== ========

5 liters green paint: 5 liter £24.8

Cost of one liter of gree paint: £24.8 / 5 liter = £4.96 / liter

4. Profit

Price of each liter of green paint: £66.96 / 10 liters = £6.696 / liter = £6.70 / liter

Profit per liter = price per liter - cost per liter = £6.70/liter - £4.96 / liter = £1.74 / liter

Percentage profit = profit per liter / cost per liter × 100

Percentage profit = (£1.74 / liter) / (£4.96/liter) × 100 = 35.08% = 35%

4 0

3 years ago

Mhanifa please help :( no one has helped me on this yet

VMariaS [17]

Answer:

16)

q / 12 = sin 20
q = 12 sin 20
q = 4.1

p / 12 = cos 20
p = 112 cos 20
p = 11.3

17)

x / 44 = tan 39
x = 44 tan 39
x = 35.6

35.6 / y = sin 39
y = 35.5 / sin 39
y = 56.4

18)

14 / b = sin 57
b = 14 / sin 57
b = 16.7

a / 16.7 = cos 57
a = 16.7 cos 57
a = 9.1

3 0

3 years ago

6 x (36÷12)2 + 8 = =

svp [43]

6*(36/12)2+8

=44

Hope this helped :T

7 0

2 years ago

Read 2 more answers

I need the answers someone helppppp..

Ad libitum [116K]

A. 6 because 30/5= 6
B. She has gotten 35 points because 7*5=35

6 0

3 years ago

Explain how to find the constant rate of change from the verbal description below.

Oksanka [162]

Answer:

62miles/1hr

Step-by-step explanation:

In order to get the rate of change I divided 124 miles by 2 hours to get 62 miles.

3 0

2 years ago

Sally is now 10 years older than Suki. 5 years ago, the sum of their age was 40. How old are they now?​

Sally is now 10 years older than Suki. 5 years ago, the sum of their age was 40. How old are they now?