Answer
let the first number be x
second number be y
5*(x)+y=-21---------->equation 1
2*(x)+y=-9------------->equation2
<h2>
eq1 * 2:</h2>
2(5x+y)=2*-21
10x+2y=-42
<h2>
eq2 * 5:</h2>
10x+5y=-45
10x+2y=-42
-(10x+5y=-45)
-----------------
0 - 3y=3
y=3/-3
<h2>
y=-1</h2><h3>
sub y=-1 in eq1;</h3><h3>
5x+y=-21</h3><h3>
5x+ -1=-21</h3><h3>
5x-1=-21</h3><h3>
5x=-21+1</h3><h3>
5x=20</h3><h3>
x=20/5</h3><h2>
x=4</h2><h2>
y=-1</h2>
Answer:
Step-by-step explanation:
Anything going from lower left to upper right is a positive slope.
The lines are not easily seen. My best estimate is that one point is (2,5)
Use the two points you are sure of.
(0,-1) and (1,2)
Givens
- x1 = 0
- x2 = 1
- y1 = - 1
- y2 = 2
Formula
m = (y2 - y1)/(x2 - x1)
Solution
m = (2 - - 1) / (1 - 0)
m = 3/1
m = 3
Answer:
v= -2
Step-by-step explanation:
subtract 7 from both sides and then divide by 2
Answer:
cout << setprecision(3) << fixed << x;
Step-by-step explanation:
Answer:
V = (12π√3)/4
SA = 12π
Step-by-step explanation:
I am going to assume your ball is a sphere and not like a football or rugby ball
Volume of a sphere:
Surface area of a sphere: 4πr², derived from Fundamental Theorem of Calculus and the equation for volume of a sphere.
plug r = √3 into these equation
V = (12π√3)/4
SA = 12π
multiply these out in your calculator if you need decimal answers