Evaluate 6x ÷ 3y - 4, if x = 20 and y = 2
2 answers:
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Answer:
x = 15
Step-by-step explanation:
Consider the right triangle on the left with hypotenuse h₁ , then
Using Pythagoras' identity
h₁² = x² + 9²
Consider the right triangle on the right with hypotenuse h₂ , then
h₂² = x² + 25²
Now consider the large right triangle with legs h₁ and h₂ , then
h₁² + h₂² = (9 + 25)² , substitute values
x² + 9² + x² + 25² = 34² , that is
2x² + 81 + 625 = 1156
2x² + 706 = 1156 ( subtract 706 from both sides )
2x² = 450 ( divide both sides by 2 )
x² = 225 ( take the square root of both sides )
x = = 15
Answer:
C.) The number of people infected is increasing at a very fast rate.
Step-by-step explanation:
Given the data:
Number of months (X):
0
1
2
3
4
5
Number of people infected (Y) :
1
5
13
33
78
180
y = 32.4x - 39.33
From the attached picture which shows the graphical relationship between months and number of people infected, we could see a positive relationship between the two variables and a slope value of 32.4 obtiamed from the plotted model shows that the rate of increase in the number of infected people is high
