Answer:
Third number is 12
Step-by-step explanation:
Let 
be common difference & 
be the third number. Set up the following equations:
Solve the simultaneous equation for x-term:
Let’s make sure that we get accurately answer. Substitute x = 12 in any equations which I’ll choose (1):
Now add each terms with common difference as 7:
-2+7 = 5
5+7 = 12
12+7 = 19
19+7 = 26
So our pattern is -2, <u>5</u>, <u>12</u>, <u>19</u>, 26. Since the question only asks for third number then the answer is 12
Area=1/2 times height times base
base=2.5
area=3.75
subsitute
3.75=1/2 times height times 2.5
multiply both sides by 2 to get rid of fraction
7.5=height itmes 2.5
divide both sides by 2.5
3=height
sail is 3 meters tall
x = 3y - 1
2y + x = x + 18
2y + 3y - 1 = 3y - 1 + 18
5y - 1 = 3y + 17
2y = 18
y = 9
x = 3(9) - 1
x = 27 - 1
x = 26
Answer:
2,-2
Step-by-step explanation:
Its pretty simple, all you have to do is find opposite of y and put it.
