13 were tested
today 3 times as much as yesterday was tested
3 times 13=39
how many tested total
13 today
yesterday 39
total=today+yesterday
total=13+39
total=52
52 were tested
Answer:
No solution
Step-by-step explanation:
we have
-----> equation C
-----> equation D
Comparing equation C and equation D
The two lines are parallel because the slope is equal ( m=2)
The y-intercept are different
so
The lines are different parallel lines
therefore
The system of equations has no solution
Answer:
Assign an identifying variable to the quantity to be found. Write a sentence stating conditions placed on the quantity. Solve the sentence for the variable.
Step-by-step explanation:
can you mark me as brainlist
Answer:
-2
Step-by-step explanation:
Let's plug your functions f(x)=x^2-2x and g(x)=6x+4 into (f+g)(x)=0 and then solve your equation for x.
So (f+g)(x) means f(x)+g(x).
So (f+g)(x)=x^2+4x+4
Now we are solving (f+g)(x)=0 which means we are solve x^2+4x+4=0.
x^2+4x+4 is actually a perfect square and is equal to (x+2)^2.
So our equation is equivalent to solving (x+2)^2=0.
(x+2)^2=0 when x+2=0.
Subtracting 2 on both sides gives us x=-2.
