Step-by-step explanation:
Use formula a^2+b^2=c^2 to find your answer.
Answer:
A.
Step-by-step explanation:
if x≠-4, then the correct answer is
Answer: (7, 0)
Step-by-step explanation:
We have the system of equations:
9*x - y = 63
x = y + 7
We can see that the "x" is isolated in the second equation, then we can replace it in the first equation to get:
9*x - y = 63
9*(y + 7) - y = 63
Now we have an equation that only depends on one variable, so we can solve it:
9*y + 63 - y = 63
8*y + 63 = 63
8*y = 63 - 63 = 0
y = 0/8 = 0.
Now we know the value of y, we can replace this in one of the initial equations to find the value of x, i will replace this in the second equation:
x = y + 7 = 0 + 7 = 7
Then the point that is a solution for the system of equations is (7, 0)
Answer:
Step-by-step explanation:
Answer:
74 cm would a ribbon need to be to go all the way around the edge of the top of the box .
Step-by-step explanation:
Formula
Perimeter of a rectangle = 2 (Length + Breadth)
As given
The rectangular top of a small box has dimensions of 140 mm by 230 mm.
Perimeter of the rectangle box top = 2 × (140 + 230)
= 2 × 370
= 740 mm
As
1 mm = 0.1 cm
Now change into 740 mm into cm.
740 mm = 0.1 × 740
= 74 cm
Perimeter of the rectangle box top = 74 cm
Therefore 74 cm would a ribbon need to be to go all the way around the edge of the top of the box .