Twice the difference of a number n and seven is equal to four less than the product of five and the number n. what is that value of n?
n=-10/3n= -1n= 1n= 10/7

n=-10/3

Step-by-step explanation:

"Twice the difference of a number n and seven is equal to four less than the product of five and the number n" translates into 2(n-7) = 5n - 4. To solve, isolate the variable n.

2(n-7) = 5n - 4

2n - 14 = 5n - 4

2n - 10 = 5n

-10 = 3n

-10/3 = n

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,

the answer is y = 11.54

hope this : )