Answer:
90
Step-by-step explanation:
Order of operations are known as PEMDAS:
P - Parenthesis
E - Exponents
M - Multiplication
D - Division
A - Addition
S - Subtraction
For the most part you have to follow these rules in order to get the correct answer. For this question you first have to multiply 19 by 4 to get 76. Next you add 35 to the number. The sum of 76 and 35 is 111. You final step is to subtract 21. Your final answer is 90. I hope this helps!
(x,y) = (0,-2) is the third option hope i helped :)
Answer:
y=3 x= -5/2
Step-by-step explanation:
simultaneous equations
2x + 4y = 7 ------ eq 1
-2x + 3y = 14 --------eq2
(different signs add)
(eq 2 + eq 1)
-2x +(-2x) = 0
4y+3y = 7y
7+14 = 21
7y= 21
(divide both sides by 7)
y= 21/7= 3
2x + 4(3) = 7
2x+ 12=7
2x = 7-12
2x = -5
x= -5/2
The domain is ur x values....so going along the line on ur x axis.....open circle means no equal sign....closed circle means there is an equal sign...
-2 < x < = 3
Decrease in population from 1990 to 2000 was 14.2 - 12.4 = 1.8
Number of years = 2000 - 1990 = 10
Since the population is decreasing, decreasing factor = - 0.18.
Hence, the linear model of the situation is P = 14.2 - 0.18t.
Check:
If t = 10, then
P = 14.2 - 0.18(10)
= 14.2 - 1.8
= 12.4