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2 years ago

Pls help me with all 3 questions! correct answer will get brainliest and a kiss...

Mathematics

2 answers:

WINSTONCH [101]2 years ago

8 0

A. {22, 25, 27, 29}

B. {20, 21, 22, 23}

Answer: A∪B = {22, 25, 27, 29, 20, 21, 23}

A. {1, 5, 10, 14, 22}

B. {5, 14, 20, 22, 27}

Answer: A∩B = {5, 14, 22}

A. {1, 5, 10, 14, 22}

B. {5, 14, 20, 22, 27}

Answer: The three items that are intersecting each have a <em>1/3</em> chance of being chosen.

anygoal [31]2 years ago

6 0

Answer:

1.union = {20 21 22 23 25 27 29}

2. intersection = {5 14 22}

3.1/3

Step-by-step explanation:

1. union U of sets a nd b ={20 21 22 23 25 27 29}

2. intersection n of sets a nd b = {5 14 22}

3. probability = one item / total

= 1/3

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4 months ago

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2 years ago

150g of roquefort cheese cost £1.68<br> work out the cost of 250g of roquefort

mafiozo [28]

ANSWER

250g of Roquefort cheese will cost

£2.8

EXPLANATION

If 150g of roquefort cheese cost £1.68, we can write the ratio,

$150: 1.68$

Let 250g of Roquefort cheese cost £x.

Then we can again write the ratio,

$250:x$

We can equate the two ratios and solve for x.

$150: 1.68 = 250:x$

We rewrite the ratios as fractions to obtain,

$\frac{150}{1.68} = \frac{250}{x}$

We cross multiply to get,

$150x = 250 \times 1.68$
This implies that,

$150x = 420$

Divide both sides by 150 to get,

$x = \frac{420}{150}$
$x = 2.8$

Therefore 250g of Roquefort cheese will cost

£2.8

6 0

3 years ago

5p-14=8p+4=. show work please

Ainat [17]

No Problem!
5p-14=8p+4
I assume this is the whole problem set up properly, so now, lets subtract the left side by 5p, and then the right side.
-14=3p+4
As you can see, the 5p cancels out on the left side, and the p leftover is what 8p-5p equals.

Now, subtract both sides by 4.
-18=3p
Now, simply divide both sides by 3 to equal
p= -6
The reason we do the divide and multiplying last is because doing it first would only make it much harder.
This is the simplest way I know of to do it. If you don't understand, just ask me.
Hope it helped!

7 0

3 years ago

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