5n + (-6) = -2
add 6 to -2
5n = -2 + 6
5n = 4
divide both sides by 5
n = 4/5
We are given
v = 18 m/hr west
θ1 = 285°
θ2 = 340°
After 1 hours, the distance traveled by the ship is
dv = 18 mi
The distance between the ship and the lighthouse is
d = 18 / cos 340
Solve for d<span />
Translating that problem into an equation with x as a variable we get 3x + x +10 = 22. Combine like terms to get 4x + 10 = 22. Subtract 10 on both sides to get 4x = 12. Divide by 4 on both sides to get x = 3.
Now to plug in. The first number was represented by 3x. So substituting 3 for the x we get 3(3) = 9. And again for the second number represented by x+10, 3+10 = 13.
Your numbers are 9 and 13. To check just add them together. 13 + 9 is 22, I'll save ya the effort.
Answer:
Expression A & Expression C are equivalent
Step-by-step explanation:
●In Expression A :-
9x - 3x - 4
=> 6x - 4 ( Substracting the like terms )
● In Expression C :-
5x + x - 4
=> 6x - 4 ( Adding like terms )
● In Expression B
12x - 4
Comparing all the expressions , we find both expression A & C have 5x - 4 as eqn. So they are equivalent.
Eqns are known as equivalent only when the final result will be equal after putting 'n' number of values in place of the variable. For example ,
expression A & C are equivalent. If we gonna take x = 1 , then the final result will be 6×1 - 4 = 2. Here we find that after putting x=1 in the expressions , the final result is equal in both the expressions & that is 2.
So the mistake of Brianna was her wrong assumption about equivalent expression.
