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olya-2409 [2.1K]
3 years ago
6

4 years ago a pint of milk

Mathematics
1 answer:
fenix001 [56]3 years ago
5 0

Given-

Cost of milk 4 years ago = £1.05

To find-

Percentage increase in cost

Solution-

Increase in cost = £ ( 1.26 - 1.05 )

→ £ 0.21

Percentage increase :-

\frac{0.21}{1.05} \times 100

→ 20

Therefore, Percentage increase of the cost of milk over 4 years is <u>2</u><u>0</u><u>%</u> .

✍️ <em>By </em><em>Benjemin</em> ☺️

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How many square tiles of side 10cm each will be needed to tile a floor which is 300cm long and 150cm wide?
S_A_V [24]

Step 1

Find the area of one tile

we know that

the area of a square is

A=b^{2}

where b is the length side of the square

In this problem

b=10\ cm

Substitute

A=10^{2}=100\ cm^{2}

Step 2

Find the area of the floor

The area of a rectangle is equal to

A=LW

where

L is the length of the rectangle

h is the width of the rectangle

In this problem

L=300\ cm

W=150\ cm

Substitute

A=300*150=45,000\ cm^{2}

Step 3

Find the number of tiles needed

by proportion

\frac{1}{100} \frac{tile}{\ cm^{2}} =\frac{x}{45,000} \frac{tile}{\ cm^{2}} \\ \\x=45,000/100 \\ \\x=450 \ tiles

therefore

<u>the answer is</u>

450 \ tiles


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True or False?
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HELP MEE ,20 POINTS !!!!
Natali [406]

Celina says true that each of the following expressions is actually a binomial expression.

<h3>What is binomial?</h3>

The binomial is a polynomial of two-term only. For example, x + 5 where x and 5 are the two separate terms.

Celina says that each of the following expressions is actually a binomial in disguise:

a.  5abc - 2a² + 6abc = 11abc - 2a²

The is a binomial expression.

b.  5x³∙2x² - 10x⁴ + 3x⁵ + 3x∙(-2) x⁴ = 7x⁵ - 10x⁴

The is a binomial expression.

c.  (t+2)² - 4t = t² + 4

The is a binomial expression.

d.  5(a - 1) - 10(a - 1) + 100(a - 1) = 95a - 95

The is a binomial expression.

e.  (2πr - πr² )r - (2πr - πr²)∙2r = -2πr² + πr³

The is a binomial expression.

Celina says true that each of the following expressions is actually a binomial expression.

More about the binomial expansion link is given below.

brainly.com/question/12249986

#SPJ1

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