All categories

3 years ago

BRAINLEST: Please help :(

Mathematics

2 answers:

Lesechka [4]3 years ago

8 0

Answer:

I think it’s either 1 or 15% out of 100.

Serjik [45]3 years ago

7 0

Answer:

i think it would be 20%

Step-by-step explanation:

You might be interested in

Multiplying in any order results in the same product is called

STatiana [176]

Answer:

C) commutative

Step-by-step explanation:

Example: a x b = b x a

7 0

3 years ago

How do I verify this identity? I know you should write sin2a as sin(a+a).

Kisachek [45]

SOLUTION

Given the question in the image, the following are the solution steps to verify the identity

STEP 1: Write the given identity

$\sin 2\alpha=2\sin \alpha\cos \alpha$

STEP 2: Verify the identity

$\begin{gathered} \sin 2\alpha=2\sin \alpha\cos \alpha \\ \text{Consider the left hand side of the above trigonometry identity.} \\ \text{That is, }\sin 2\alpha\text{.} \\ \text{ Rewrite }\sin 2\alpha\text{ as }\sin (\alpha+a) \\ \text{ It is known that }\sin (a+b)=\sin (a)\cos b+\cos (a)\sin (b) \\ U\sin g\text{ this statement above, we have;} \\ \sin (\alpha+a)=\sin a\cos \alpha+\cos a\sin \alpha \\ \text{It is known that }xy+yx=xy+xy=2\times xy=2xy \\ U\sin g\text{ this statement above, we have;} \\ \sin a\cos \alpha+\cos a\sin \alpha=\sin a\cos \alpha+\sin \alpha\cos \alpha=2\times\sin \alpha\cos \alpha=2\sin \alpha\cos \alpha \\ \text{Hence, }\sin 2\alpha=2\sin \alpha\cos \alpha \end{gathered}$

The verification of the identity is as seen above.

7 0

1 year ago

How many solutions does this system have? y = 3/4x - 5. - 3 x + 4 y = - 20.

dedylja [7]

Answer:

infinite

Step-by-step explanation:

4 0

3 years ago

The total weight of a fully loaded coal truck is 4 tons. The ratio of the weight of the truck to the weight of the coal is 7:5.

Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

total weight is 4 tons.

ratio of weight of truck to weight of coal is 7:5....added = 12

so 7/12 of the total weight is the truck's

and 5/12 of the total weight is the coal

7/12 of 4 tons = 7/12 * 4 = 28/12 = 2 1/3 tons <== weight of truck

5/12 of 4 tons = 5/12 * 4 = 20/12 = 1 2/3 tons <== weight of coal

8 0

3 years ago

How do you write 3/2 as a percentage?

sweet [91]

= 1.5
<span>Move decimal point to right two places, to change into percent </span>
<span>= 150%</span>

4 0

3 years ago