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nignag [31]
3 years ago
8

30 children are going on a trip. It costs £5 including lunch. Some children take their own packed lunch. They pay only £3.the 30

children pay a total of £110.
How many children are taking their own packed lunch?
(please show your working)
Mathematics
1 answer:
myrzilka [38]3 years ago
7 0
110 = 5x + 3y     (yet x + y = 30)
Therefore the only explanation would 10 kids bought lunch and 20 packed because....
10 + 20 = 30       AND     5 * 10 = 50     3 * 20 = 60       60 + 50 = 110
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JulsSmile [24]

The first thing we need to do is find the rate of parts for 15 minutes.

So, we divide 114 parts per 6 minutes and get 19 parts per minute


Then we multiply this rate per minute by 15 minutes

The answer is 285


Attached Work Below:

Part1\\114\div6=19\\\\Part 2\\19\times15=285

7 0
3 years ago
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A trader had 30,500 eggs . He sold 12,680 of them to John and 16,570 to Peter. How many eggs he had left
zlopas [31]

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C. 17,820

Step-by-step explanation:

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4 0
2 years ago
8. For circle A, the circumference is 31.4 ft. What is the area? Use 3.14 for pi
telo118 [61]

Answer:

\huge\boxed{\sf A = 78.5\ ft\²}

Step-by-step explanation:

Circumference = C = 31.4 ft

We know that,

<h3>C = 2πr</h3>

Where, r is the radius

31.4 = 2(3.14)r

31.4 = 6.28(r)

Divide 6.28 to both sides

31.4/6.28 = r

5 ft. = r

<h3>r = 5 ft.</h3>

Now,

<h3><u>Finding area:</u></h3>

A = πr²

A = (3.14)(5)²

A = (3.14)(25)

<h3>A = 78.5 ft²</h3>

\rule[225]{225}{2}

7 0
2 years ago
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Please Help!!
neonofarm [45]
The anwser is 3/5 hope it helps
7 0
3 years ago
Problem Page A principal of $2100 is invested at 7.75% interest, compounded annually. How much will the investment be worth afte
just olya [345]

Answer:

After 12 years the investment will be worth $5145.

Step-by-step explanation:

The formula used for compounded interest is:

A = P(1+r/n)^nt

where,

A = future value

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r = interest rate

n = no of times interest is compounded

t = time

In the question given:

A=?

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n = 1

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A= 2100*(1+0.0775/1)^1*12

A= 2100 *(1+0.0775)^12

A= 2100 *(1.0775)^12

A= 2100 * 2.45

A= 5145

So, after 12 years the investment will be worth $5145.

6 0
3 years ago
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