Answer:
x= - 3.5
y= - 6.5
Step-by-step explanation:
-3x+y = 4 equation 1
-9x + 5y = -1 equation 2
and
equation 1 can be written as
y = 4+ 3x
so put this in equation 2
-9x + 5 ( 4+ 3x) = -1
-9x +20 +15x = -1
6x = -21
X= -21 ÷ 6
X = - 3.5
so put this value of x in equation 1 to find value of y
-3 ( -3.5) + y = 4
10.5 + y = 4
y = 4 - 10.5
Y = - 6.5
Answer:
D
Step-by-step explanation:
The area (A) of an equilateral triangle is calculated as
A = 
← s is length of a side
Here s = 12, thus
A = 
= 
= 36
→ D
Answer:
-20
Step-by-step explanation:
Answer:
C. 400
Step-by-step explanation:
You have to multiply 10 x 10 (the base length and width) by 12 (the height) and divide it by 3.
