4/5x - 4/10 = 2/20...multiply everything by common denominator 20
16x - 8 = 2
16x = 2 + 8
16x = 10
x = 10/16 which reduces to 5/8 <=
Answer:
Cross-sectional
Step-by-step explanation:
Cross sectional study is a type of observational study that analyzes data from a population of a representative subset at a particular point in time.
Answer:
y-intercept = (0, -2)
x-intercept = (2, 0)
Step-by-step explanation:
The y-intercept is the value of y when x = 0. Therefore, Given the linear equation, y = x - 2:
Let x = 0:
y = 0 - 2
y = -2.
Therefore, the y-intercept of the linear equation, y = x - 2 is (0, -2).
The x-intercept is the value of x when y = 0.
Therefore, let y = 0:
y = x - 2
0 = x - 2
Isolate x by adding 2 to both sides of the equation:
0 + 2 = x - 2 + 2
2 = x
Therefore, the x-intercept is (2, 0).
Step-by-step explanation:
a = age of Alex
l = age of Lucy
m = age of Megan
a + l + m = 126
l = 3a
l = m + 7
=>
a = l/3
m = l - 7
we are using that in the first equation :
l/3 + l + l - 7 = 126
l + 3l + 3l - 21 = 378
7l = 357
l = 357/7 = 51
a = l/3 = 51/3 = 17
m = l - 7 = 51 - 7 = 44
the ratio of the age of Lucy to Alex to Megan is
51 : 17 : 44
