A packet of candles and a box of matches cost ₦420. The candles cost 6 times as much as the matches. Find the cost of the matches.Please show the workings.
Thanks

Answers

Answer 1

Answer: Let's say
cost of packet of candles = a

cost of box of matches = b

Total cost = 420
a + b = 420

cost of candles = 6 times of cost of box of matches
a = 6 * b
a = 6b

a + b = 420
6b + b = 420
7b = 420
b = 60

so cost of matches = 60

Answer 2

Answer: x - price of candles
y - price of matches

x+y=420
x=6y

6y+y=420
7y=420
y=60

Matches cost ₦60.

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Amanda and Katie are twins. At birth, Amanda was 6 3/10 pounds and Katie was 5 9/10 pounds. What is their combined birth weight?

Answers

Answer:

10 2/10

Step-by-step explanation:

because together it equals 9 12/10 but that cant happen so you add 1 to the 9 and get 10 so you have 2 left over

Mark me as brainliest

12.2 or 12 1/5

6 + 5 = 11
3/10 + 9/10 = 12/10
11 + 1 = 12 + 2/10
simplified is 1/5

12 1/5

An engineer scale model shows a building that is 3 inches tall. If the scale is 1 inch = 600 feet, how tall is the actual building in feet ?

Answers

The actual height of building is 1800 feet.

Step-by-step explanation:

Given,

Height of building in model = 3 inches

Scale used by engineer;

1 inch = 600 feet

Therefore;

Actual height of building = Height in model * Scale used

Actual height of building = 3 * 600

Actual height of building = 1800 feet

The actual height of building is 1800 feet.

Rational number between 5.2 and 5.5

Answers

Answer: 5.252525...

Step-by-step explanation: Since this decimal does not terminate, it could be an irrational number. However notice that the 25 after the decimal point repeats and remember that repeating decimals are rational numbers.

Therefore, 5.252525... is an example of a rational number.

5.3

or

5.4

or

5.48

Any of these is a rational number between 5.2 and 5.5.

The exchange rate is : £1 = $1.54 how many £ would you get for $77

Answers

77 / 1.54 = £ 53.8461538

Check = 53.85 x 1.54 = 77

Compare simplifying before multiplying fractions with simplifying after multiplying the fractions

Answers

Answer:

We can compare this using example:

Suppose the two fractions are $(20)/(25)$ and $(12)/(36)$

When we simplify before multiplying:

$(20)/(25)$ (dividing both numerator and denominator by 5) in simplified form becomes $(4)/(5)$

Similarly $(12)/(36)$ becomes $(1)/(3)$

Now multiplying:

$(4)/(5) *(1)/(3)$ = $(4)/(15)$

When we simplify after multiplying:

$(20)/(25) *(12)/(36)$ = $(240)/(900)$

Now simplifying this:

Dividing both numerator and denominator by 10; we get

$(24)/(90)$

Now dividing by 2:

$(12)/(45)$

Now dividing by 3:

$(4)/(15)$

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Now, we can see and compare that when we multiply after simplifying, the result is simplified and calculation is easier.

When we do not simplify and multiply at first, the results are bigger numbers and it is difficult to simplify bigger numbers.

We will start using a new way to indicate simplifying fractions. When a numerator or
a denominator gets simplified, we will cross it out with a slash and write the new
numerator or denominator next to it (either above it or below it).The number you divide by (the 4) does not get indicated in any way! You only
think about it in your mind: “I divide 12 by 4, and get 3. I divide 20 by 4, and get 5.”You may not see any advantage over the “old” method yet, but this shortcut will
come in handy soon.

write a word problem that can be solved by ordering three decimals to thousandths. include a solution

Answers

Mary, Anne, and Rose decided to race their three pet snails, Anthony, James, and Thomas to see which was fastest. Anthony finished in 23.38 minutes. James finished in 23.65 minutes. Thomas finished in 23.13 minutes. Order the finish times from least amount of time to greatest to see which snail was the winner of this very intense and serious race.
23.12, 23.38, 23.65

Final answer:

An example of a word problem that can be solved by ordering three decimals to thousandths is determining the order in which three items were purchased based on their prices.

Explanation:

An example of a word problem that can be solved by ordering three decimals to thousandths is:

John bought 3 different items from a store. The prices of the items were $2.345, $2.450, and $2.400 respectively. In what order did John purchase the items from least expensive to most expensive?

To solve this problem, we can order the decimals from least to greatest by looking at the thousandths place. The correct order is $2.350, $2.400, and $2.450.