3 years ago

1

Mathematics

2 answers:

creativ13 [48]3 years ago

4 0

Answer:

4:5

Step-by-step explanation:

8/10 divided by 2/2 is 4/5

Gnesinka [82]3 years ago

3 0

Answer:

Step-by-step explanation:

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Sin2x=____. a. 2 cos^2 x-1 b. (1-cos 2 x)/2 c. 2 sin x cos x d. sin^2x cos^2 x

Doss [256]

Answer:

C. 2 sin x cos x

7 0

3 years ago

M is directly proportional to r cubed when r = 4, m = 160. Find the value of r when m = 540

Anarel [89]

Answer:

r = 6

Step-by-step explanation:

Given that M is directly proportional to r³ then the equation relating them is

M = kr³ ← k is the constant of proportionality

To find k use the condition r = 4 when M = 160

k = $\frac{M}{r^3}$ = $\frac{160}{64}$ = 2.5, so

M = 2.5r³ ← equation of proportionality

When M = 540, then

540 = 2.5 r³ ( divide both sides by 2.5 )

216 = r³ ( take the cube root of both sides )

r = $\sqrt[3]{216}$ = 6

5 0

3 years ago

What is the square root of 75 to the nearest integer

kodGreya [7K]

<u><em>5√3 is the correct answer.</em></u> First you had to find the prime factorization of 75, and it gave us, $3*5^2=5*5=25*3=75$ , or $=\sqrt{5^2*3}$ . Then you can use apply radical rule, and it gave us, $\sqrt{3} \sqrt{5^2}$ , or $\sqrt{5^2}=5$ , and it gave us the answer is 5√3 is the correct answer. Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie