X= -4y let this be equation 1
x+5y=2 let this be equation 2
substitute equation 1 in 2
-4y + 5y = 2
y=2
substitute the value of y in equation 1
x= -4y
x= -4(2)
x= -8
Answer:
Step-by-step explanation:
1）22
2）40
3）44
4）62
5）26
6）55
7）29
8）45
9)The picture is not clear
10) 52
Answer:
Option C is correct.
The value of r=0.2 represents the weakest correlation.
Step-by-step explanation:
Strongest correlation states that a linear relationship is indicated by a correlation coefficient of -1 or 1.
Weakest correlation states that a linear relationship is indicated by a correlation coefficient equal to 0 or if the value is nearest to 0, then it also represents the weakest correlation.
From the options, the only r-value that is very close to 0 is 0.2.
Therefore, the r-value represents the weakest correlation is, 0.2
Answer:
dC/dt = 2 mg*cm³/s
Step-by-step explanation:
Given
C(t)= (1/2)*(4t+ 4)- (1/2)
we apply dC/dt as follows
dC/dt = d((1/2)*(4t+ 4)- (1/2))/dt = (1/2)*(4) = 2
⇒ dC/dt = 2 mg*cm³/s
First you need to simplify the left side of the equation to get
Then you add by two on both sides to get
Finally you divide by 2 on both sides to get
