Answer:
c
Step-by-step explanation:
3a + 2 = 2a + 7
a +2 = 7
a = 5
Answer:
45 meters
Step-by-step explanation:
I hope this helps.
Answer:
y = -2x - 6
Step-by-step explanation:
Use slope-intercept form to start the equation. y2 - y1 / x2 -x1
-6 - 0 / 0 - (-3) = -6 / 3 = m = -2
Then plug m (-2) into your y=mx+b equation.
y = -2x + b
substitute -6 for y value and 0 for x value to find value of b.
-6 = -2(0) + b
simplify
-6 = 0 +b
subtract 0 from both sides
-6 = b
plug b value back into the equation
final equation of line is: y = -2x -6
Answer:
Step-by-step explanation:
We know that when X is normal
X-mu/sigma is std normal
Here the scores X is normal with mean =140 and sd =40
a) X=172
gives Z = 32/40 = 0.80
P(Z<0.8) = 0.5+0.2881
=0.7881
Hence 79th percentile
b) X =200 then x-mu = 60
So z=60/40 = 1.5
c) 100<x<160 means
1.5<z<0.5
d) X>190 means Z>1.25 hence proportion = P(Z>1.25) =0.5-0.3944
=0.1056
e) For 67th percentile z value = 0.0675
Hence x score = 140+0.0675(40) = 142.7
Answer:
Step-by-step explanation:
3x + y = 7
-2x - y = 9
x = 16
answer is B
3(16) + y = 7
48 + y = 7
y = -41
