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3 years ago

Solve for k: A=5k/7y

Mathematics

1 answer:

Mashutka [201]3 years ago

4 0

Answer:

7/5 * A *y =k

Step-by-step explanation:

A=5k/7y

Multiply each side by 7y

A* 7y = 5k/7y * 7y

7Ay = 5k

Divide by 5

7Ay/5 = 5k/5

7/5 * A *y =k

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Maria has a portfolio consisting of 7 shares of stock A (purchased for $70 per share) and 4 shares of stock B (purchased for $10

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Hence, the expected rate of return after 1 year for Mary's portfolio is $0.17751$

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Purchase 7 shares of stock A for $70 per share and 4 shares of stock B for $100 per share then The expected rate of return after 1 year for Mary's portfolio.

Weight invested in stock A is $W_x=\frac{7\times 70}{7\times 70+4\times 100}$

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3 years ago

Question 9 - (3 marks available)

navik [9.2K]

Image of the triangle is attached

Answer:

24 cm

Step-by-step explanation:

If two triangles are similar, the corresponding sides must be in the same ratio.

From the diagram, the height of the triangle is 36cm.

But the height of triangle ABE = h,

To find the height of triangle BCD, let's subtract the height of triangle ABE from 36cm.

Therefore.

Height of BCD = 36 - h.

Since the triangles are similar and their corresponding sides have the same ratio, we have the expression:

$\frac{b}{h} = \frac{b}{h}$

Substituting figures, we have:

$\frac{20}{h} = \frac{10}{36-h}$

Cross multiplying, we have:

20(36-h) = 10 * h

720 - 20h = 10h

720 = 10h + 20h

720 = 30h

$h = \frac{720}{30}$

h = 24 cm

Therefore, the height of triangle ABE is 24cm

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