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3 years ago

Please help me, i need the answers ASAP! (With proper steps please)

Mathematics

1 answer:

docker41 [41]3 years ago

4 0

a) 35 x 13 + 3.14 x $\frac{13}{2}$ ²

= 455 + 3.14 x 42.25

= 455 + 132.665

= 587.665 m²

∴ The area is 587.665 m².

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3 years ago

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Viefleur [7K]

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75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

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$Average = \frac{x + y}{2}$

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Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

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$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

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$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

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$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

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$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

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2 years ago