Answer:
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try! A variable doesn't have to be "x", it could be "y", "w" or any letter, name or symbol.
Step-by-step explanation:
Answer:
- perimeter: 56 units
- area: 192 square units
Step-by-step explanation:
We assume you're interested in the convex polygon, so the given vertices are <em>not</em> listed in order around the figure.
The figure is 12 units by 16 units, so has a perimeter of ...
P = 2(L +W)
P = 2(16 +12) = 56 . . . . units
and an area of ...
A = LW
A = (16)(12) = 192 . . . . square units
.36 × 12 = 4.32
Given this result, of the answers given, we must say that at least 4 people will say cashews are their favorite nut.
Answer:
x = 1
y = 2
Step-by-step explanation:
3y + x = 7 first equation
-2y + 4x = 0 second equation
multiplying by -4 the first equatión
-4(3y + x = 7)
-4*3y -4*x = -4*7
-12y -4x = - 28
and sum the second equation:
-12y - 4x = -28
- 2y - 4x = 0
-14y - 0 = -28
-14y = -28
y = -28/-14
y = 2
from the first equation:
3y + x = 7
3*2 + x = 7
6 + x = 7
x = 7 - 6
x = 1
Check:
from the second equation:
4x - 2y = 0
4*1 - 2*2 = 0
4 - 4 = 0
