Answer:
a=3
Step-by-step explanation:
Three or more lines in a plane are said to be concurrent if they intersect at a single point.
First find the point of intersection of lines y=x+4 and 2y+x=2. Substitute y=x+4 into the second equation:
2(x+4)+x=2
2x+8+x=2
2x+x=2-8
3x=-6
x=-2
Then
y=-2+4=2
So, the point of intersection is (-2,2). The coordinates of this point must satisfy the equation of the third line, thus
2=a·(-2)+8
2=-2a+8
2a=8-2
2a=6
a=3
Answer:
y=0x-1
Step-by-step explanation:
mx is our slope, while our b is always going to be our y intercepts
Answer:
The percentage is k = 2.3%
Step-by-step explanation:
From the question we are told that
The population mean is
The standard deviation is
Given that the sales are normally distributed and that students at a certain school who sell at least 75 magazine subscriptions win a prize then the percent of the fourth grade students receive a prize is mathematically represented as
Generally
So
From the standardized normal distribution table
=>
The percentage of the fourth grade students receive a prize is
k = 0.023 * 100
k = 2.3%
Answer:
D.
Step-by-step explanation:
6 times 10 is 60
7 times 10 is 70