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A square has sides of length x cm. The length of a rectangle is equal to the perimeter of this square. The perimeter of this rectangle is 14x cm. Find an expression for the width of this rectangle. Give your answer in terms of x.

l(s) = xl(r) = 4xp(r) = 14xP(r) = 8x + 2w = 14xw = 3x
MZ
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Find 16% of £435

16% of £435 is equal to 10% of £435 + 6% of £435. 10% of £435 = 435 = £43.56% of £435 is 6 x 1% of £4351% of £435 = 435/100 = £4.35£4.35 x 6 = £26.1 16% of £435 = £43.5 + £4.35 = £47.85
MA
Answered by Minnie A. • Maths tutor
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Describe two ways the body prevents the entry of microorganisms.

Acid in stomach kills pathogens in food.Skin creates a barrier that microorganisms cannot enter through.Hairs in nose and ears that trap microorganisms.Mucus and cilia in the trachea and bronchi that trap mi...
MA
Answered by Minnie A. • Biology tutor
13847 Views

Minnie and Helen are playing in the same hockey match. The probability of Minnie scoring a goal is 0.3. The probability of Helen scoring a goal is 0.4. What is the probability of both Minnie and Helen scoring a goal.

The probability of two events happening is equal to the probability of event 1 times the probability of event 2. Therefore, the probability of both Minnie and Helen scoring a goal is equal to the probability...
MA
Answered by Minnie A. • Maths tutor
3398 Views

Why does iodine have a higher boiling point than chlorine?

Neither iodine or chlorine have permanent dipoles because there is no difference in electronegativity between the atoms, so there are no permanent dipole : permanent dipole interactions. There are also no hy...
EE
Answered by Ellie E. • Chemistry tutor
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