Step-by-step explanation:
log(7·x + 7) = 1
7·x + 7 = 10^1
7·x = 10 - 7
x = 3/7 = 0.4285714285
No because x=4 and y=-5 and when you plug it in you get 5(4)+2(-5)=8 20+-10=8 and 10= does not work so it is not a possible solution.
Answer:
y = -16
Step-by-step explanation:
Given that,
y varies directly with x. Mathematically, we can write it as follows :
or
Where
k is constant
Put y = 12 and x = -3 to find k. So,
Now put k = -4 and x = 4. So,
So, the required value of y is equal to -16.
Answer:
square so all sides are equal
bc^2+mc^2=bm^2
16x^2+4x^2=20x^2=2root5x
nd^2+dm^2=nm^2
x^2+4x^2=5x2=root5x
then:-
1/2*b*h=1/2*2root5x*root5x
=1/2*10x^2=5x^2