What is the value of cd if c=7 and d=6

+42

Step-by-step explanation: In this problem we are going to evaluate cd knowing that c = 7 and d = 6.

So the first thing we want to do is substitute

these numbers into our problem.

Since c = 7, we are going to replace this c with a 7 and as we do that, we are going to put that 7 in parentheses.

Make sure to get into the habit of putting numbers in parentheses when substituting them in for variables.

Now we will replace the d with the 6.

So we now have (7)(6) which simplifies to +42.

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)