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2 years ago

10

Which of the graphs below represents the equation 4x+y=7?

1 answer:

Goryan [66]2 years ago

4 0

Graphs number 2 or c

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Given that Triangle ABC such that<br>a=8cm, b=7cm and c=9cm<br>tem and c= 9cm find Cos B

charle [14.2K]

Answer:

We use cosine rule also called cosine law which states

c^2=a^2+b^2-2abcosC

given

a=8cm, b=7cm, c=9cm cos C?

9^2=8^+7^2-2*8*7 cos C

expand

81=64+49-112 cos C

like terms together

81-113=-112 cos C

-32=-112cos C

multiply both sides by -1

32=112cos C

divide both sides by 112

32/112=cos C

cosC=0.2857

find cos inverse of 0.2857

angle C= 73.40

4 0

3 years ago

A fruit seller purchased 20 kg of apples at Rs 80 per kg and sold them at Rs 85 per kg. find profit and profit percent

viktelen [127]

Answer:

Profit = Rs 100

Profit %age = 6.25%

Step-by-step explanation:

Cost Price = Rs 80

Cost Price for 20 kg = Rs 1600

Selling Price = Rs 85

<u><em>Profit for 1 kg</em></u> = Rs 85 - Rs 80

=> Rs 5 (For 1 Kg)

<u><em>Profit for 20 kg:</em></u>

=> Rs 5*20

=> Rs 100

<u><em>Now Profit %age:</em></u>

=> $\frac{100}{1600}* 100$

=> 0.0625 * 100

=> 6.25%

7 0

3 years ago

Read 2 more answers

Which of these functions has a y-intercept of (0, 7)? Select all that apply

Anton [14]

Answer:

(0,7)

Step-by-step explanation:

there is no problem work shown.

6 0

2 years ago

The radius of a circle is 5 inches what ia the area

Crank

Answer:

A = pi * r^2 = pi * 5^2 = 25*pi = 78.54 in²

4 0

2 years ago

Read 2 more answers

Justine correctly multipled the decials shown. How can the product be correct without three decial places 8.5 x 2.34 = 19.89

Sloan [31]

Answer:

The answer is "19.89".

Step-by-step explanation:

Given:

$\to 8.5 \times 2.34$

Solution:

$8.5 \times 2.34 \\-----\\$

$340 \\$

$255 \times$

$\\ 17 0\times \times$

$-------\\$

$19.890$

$\to 19.890 \approx 19.89$

that's why the answer is correct.

6 0

3 years ago