R = 8 tan(x) sec(x)

In order to solve this, we are going to use the following:
r = sqrt(x^2 + y^2) //but in this case, we don't need this.
tan(x) = Y / X
X = r cos(x)
Y = r sin(x)

(r cos x)^2 = 8(r sin x)

x^2 = 8y

3 0

3 years ago

20 is what percent of 50? A. 40% B. 10% C. 250% D. 30%

zvonat [6]

A is the correct answer. To find 10% of 50, divide it by 10. This gives you 5. If 5 is 10%, then 20 is 40%, because 20 is 4 x 5 and 40 is 4 x 10.

5 0

2 years ago

Read 2 more answers

a child lies on the ground and looks up at the top of a 14-ft tree nearby. the child is 7 ft away from the tree. what is the ang

iragen [17]

Answer:

63°

Step-by-step explanation:

From the diagram, the angle of elevation from the child to the top of the tree can be calculated using the tangent ratio.

Recall SOH-CAH-TOA from your Trigonometry class.

The tangent is opposite over adjacent.

$\tan(A) = \frac{14}{7}$

$A = \tan^{ - 1} ( 2)$

$A = 63.43 \degree$

The angle of elevation is 63° to the nearest degree.

7 0

3 years ago

Find out what number the X represents 7x -9 = 5​

Find out what number the X represents 7x -9 = 5