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2 years ago

Could someone help here, thankyou!

Mathematics

1 answer:

ludmilkaskok [199]2 years ago

3 0

Answer:

x = 6 cm

Step-by-step explanation:

Given ratio of sides of similar figures = a : b , then

ratio of areas = a² : b²

Here ratio of areas = 5 : 45 = 1 : 9 , so

ratio of sides = $\sqrt{1}$ : $\sqrt{9}$ = 1 : 3

Thus side of B is 3 times side of A

x = 3 × 2 = 6 cm

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Two semicircles are attached to the sides of a rectangle as shown.

melomori [17]

Answer:

$157\ in^{2}$

Step-by-step explanation:

we know that

The area of the figure is equal to the area of rectangle plus the area of two semicircles

The area of rectangle is equal to

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The area of the small semicircle is equal to

$A=\pi r^{2} /2$

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substitute

$A=(3.14)(2.5^{2})/2=9.8125 in^{2}$

The area of the larger semicircle is equal to

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8 0

2 years ago

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Values of k for which the quadratic equation 2x - kx + k 0 has equal roots is

WARRIOR [948]

Answer:

The answer is D.

Step-by-step explanation:

We have to apply Discriminant Law. When a quadratic equation, ax² + bx + c = 0 has equal roots so the discriminant will be 0. Then, you have to substitute the values into the formula :

$D = {b}^{2} - 4ac$

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$k(k - 8) = 0$

$k = 0$

$k - 8 = 0$

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4 0

3 years ago

I NEED THIS ANSWER ASAP(1000-???)=487

lakkis [162]

Answer:

The answer is 513

Step-by-step explanation:

To get this answer you can subtract 487 from 1000 and then put the answer in the missing place!

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2 years ago

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marta [7]

Answer:

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Step-by-step explanation:

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2 years ago

A land is in the shape of a semicircle with radius 10m.How much wire is needed to fence the plot

Tamiku [17]

Answer:

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