3 years ago

What is 20% of $3,500 ?

Mathematics

1 answer:

stealth61 [152]3 years ago

4 0

Answer:

700

Step-by-step explanation:

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7 out of 10 doctors If there are 4200 doctors that prefer Cough-Up brand syrup, how many total doctors are there? * A)6000 B)294

RoseWind [281]

Answer: a) 6000

reason:

if 7 out of 10 doctors prefer cough up syrup, then that means 4200 is 7/10ths of the doctors
divide 4200 by 7 to get 600
then, multiply 600 by 10 to get 6000, the total number of doctors

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3 years ago

Prove that: sin8A/1-cos8A=cot4A

nikitadnepr [17]

Step-by-step explanation:

Recall the identity

$\tan \frac{A}{2}= \dfrac{1 - \cos A}{\sin A}$

We can see that

$\dfrac{\sin 8A}{1 - \cos 8A} = \dfrac{1}{\tan 4A}= \cot 4A$

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3 years ago

Which points are reflections of each other across both the y-axis

ser-zykov [4K]

Answer:

Reflect over the y-axis

Step-by-step explanation:

When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed).

Notice that B is 5 horizontal units to the right of the y-axis, and B' is 5 horizontal units to the left of the y-axis.

The reflection of the point (x,y) across

the y-axis is the point (-x,y).