Answer:
The solution is x=4.75 and y = -22
Step-by-step explanation:
To find the solution to the system of equations, we will follow the steps below:
3.2x + 0.5y = 4.2 --------------------------------------------------------------------------(1)
-1.6x -0.5y = 3.4 ----------------------------------------------------------------------------(2)
add equation (1) and equation (2)
1.6x =7.6
Divide both-side of the equation by 1.6 to get the value of x
1.6x /1.6 =7.6/1.6
x =4.75
substitute x = 4.75 into equation (1) and solve for y
3.2(4.75) + 0.5y = 4.2
15.2 + 0.5y = 4.2
subtract 15.2 from both-side of the equation
15.2 - 15.2 + 0.5y = 4.2-15.2
0.5y = -11
Divide both-side of the equation by 0.5
0.5y/0.5 = -11/0.5
y = -22
The solution is x=4.75 and y = -22
Option D
Stratification is the splitting of data into case-specific tables is true.
<u>Explanation:</u>
Stratification is a method or configuration of layers, groups, or sections. Stratification intends to classify data/characters/objects into distinct groups or layers. Stratification consists of splitting the group into subsets (named strata) within individual of which an autonomous sample is chosen.
Stratified sampling in statistics is applied to highlight contrasts within groups in a population, as objected to simple random sampling. Stratification is the part of something, primarily society, into various groups or layers.
9514 1404 393
Answer:
y' = -sin(x)
Step-by-step explanation:
Your table of derivatives of trig functions tells you the derivative of the cosine is the opposite of the sine.
dy/dx = -sin(x)
Answer:
the answer is 2
Step-by-step explanation:
y=-6x+19
-6x+4y=16
-6x+4(-6x+19)=16
-6x-24x+76=16
-30x+76=16
-30x=16-76
-30x=-60
if there is - in both side we should cut them
30x=60
x=60/30
x=2
Hope it is helpful for you
please follow me
Answer:
3/25
Step-by-step explanation:
Rewrite the decimal number as a fraction with 1 in the denominator
0.12=0.121
Multiply to remove 2 decimal places. Here, you multiply top and bottom by 10^2 = 100
0.12/1×100/100=12/100
Find the Greatest Common Factor (GCF) of 12 and 100, if it exists, and reduce the fraction by dividing both numerator and denominator by GCF = 4,
12÷4/100÷4 = 3/25
Therefore
0.12 = 3/25
