Answer:
Step-by-step explanation:
Answer:
(2,9)
Step-by-step explanation:
To do this you have to solve one of the equations for a variable.
-x+y=7
2x+3y=31
Because the first equation doesn't have any numbers attached to the variables I decided to solve for the y in that equation.
-x+y=7
y=x+7
With this now one would have to plug this into the second equations:
2x+3(x+7)=31
Use the distributive property.
2x+3x+21=31
simplify.
5x+21=31
Isolate the x.
-21 -21
5x=10
solve for the x.
x=2
Plug the x into one of the equations and solve for y.
-x+y=7
-2+y=7
isolate the y.
+2 +2
y=9
This is the point of solution.
Answer: C, 420
Step-by-step explanation:
The first positive even numbers are from 2 to 40, so the sum is equal to the number of terms, times the number of terms plus one (20*21 = 420)
the sum is 420
Answer:
B
Step-by-step explanation:
8 times 8 = 64
17 times 8 = 136
64 + 136 = 200
Answer: infinitely many
Step-by-step explanation:
In geometry , A line is a straight (one dimensional ) undefined figure which has no thickness. It extends infinitely in each direction (no-endpoint).
A point is also a undefined geometric figure that has no dimension , it helps to get the exact location of any figure on plane.
Since a line extends infinitely in both directions, so there are infinite number of points contained by it.
Thus , the number of points are contained on a line = Infinitely many
