Answer:
4 and 15
Step-by-step explanation:
Let the two numbers be a and b.
The sum of the two is 19. Therefore:
One number (let's use a) is 7 <em>more</em> than twice the other. Thus:
Solve for the system of equations. Substitute the second equation into the first:
Subtract 7 from both sides:
Combine like terms:
Divide by 3:
So, b is 4.
And since they add up to 19, this means that a is:
So our numbers are 4 and 15
And we are done :)
Answer:
x=5, y=4. (5, 4).
Step-by-step explanation:
2x-3y=-2
4x+y=24
------------------
-2(2x-3y)=-2(-2)
4x+y=24
----------------------
-4x+6y=4
4x+y=24
--------------
7y=28
y=28/7
y=4
4x+4=24
4x=24-4
4x=20
x=20/4
x=5
Answer:
14 and 6th I think correct me if I'm wrong this is for help not to cheat
Answer (-3,6)
#
f(x)=x ² +6x+15
=(x ² +6x+9)+6
=(x+3) ²+6
the vertex:(-3,6)
The general formula for the lateral surface area of a right prism is
L = ph
where p represents the perimeter of the base and h represents the height of the prism.
In our case, the perimeter is the sum of the bases.
p = 5 + 5.6 + 2.5 = 13.1 cm
now, the height of the prism is 8 cm
then L = 13.1 cm x 8 cm = 104.8cm^2
