Answer:
1350 mm²
Step-by-step explanation:
The area of each square face is the square of the edge length:
... face area = (15 mm)² = 225 mm²
There are 6 square faces on a cube, to the total surface area is 6 times that of one face:
... cube area = 6 × face area = 6×225 mm² = 1350 mm²
Answer:
See below
Step-by-step explanation:
This is a system of equations. That means you are trying to find the point that makes both lines true at the same time.
To do this you have to solve for one variable at a time. Luckily, these equations already have one variable that will cancel. If you add 2x and -2x, you get 0. I'm going to line these up like a vertical math problem to show you how it works.
-2x + 3y = 12
2x +3y = 0 Add together
-------------------
0x + 6y = 12 Simplify by removing the 0x
6y =12 Divide both sides by 6 to solve for y
y = 2
Plug 2 in for y in one of the original equations.
2x + 3(2) = 0
2x + 6 = 0 Subtract 6 from both sides
2x = -6 Divide by 2 to solve for x
x = -3
The point that makes both lines true is (-3,2). This is where the lines intersect.
Answer:
Infinite solutions
Step-by-step explanation:
3(2d-1)-2d=4(d-2)+5 | Given equation
6d - 3 - 2d = 4d - 8 + 5 | Distribute
4d - 3 = 4d - 3 | Combine like-terms
4d = 4d
Infinite solutions, the terms are equal.
Answer:
D
Step-by-step explanation:
just did it on usatestprep
1
25------ this is mixed fraction
5
42/7 ×21/5
=42×3/5
=126/5
when we divied then it come in mixes fraction