8x + 4y = -20 ⇒ 24x + 12y = -60
6x + 6y = -18 ⇒ 12x + 12y = -36
12x = -24
12 12
x = -2
8x + 4y = -20
8(-2) + 4y = -20
-16 + 4y = -20
+ 16 + 16
4y = -4
4 4
y = -1
(x, y) = (-2, -1)
-7x + 7y = -21 ⇒ -14x + 14y = -42
4x - 2y = 22 ⇒ 28x - 14y = 154
14x = 112
14 14
x = 8
-7x + 7y = -21
-7(8) + 7y = -21
-56 + 7y = -21
+ 56 + 56
7y = 35
7 7
y = 5
(x, y) = (8, 5)
Answer:
a)
Step-by-step explanation:
find a linear function that models these data.
Answer:
solve the problem and round it to the nearest number
Hope This Helps! Have A Nice Day!!
The answer is 5
Change 2.26kg into pounds, you get 4.98244713…….
This rounds up to 5 pounds
Answer:
18.5 in
Step-by-step explanation:
Let x be the length of board.
Actual width of board,b=1.5 in
Height of board,h==5.5 in
Density of wood=0.021lb/cubic in
Weight of wood=3.2 lbs
We know that
Volume=
By using the formula
Volume of wood=
Volume of wood=
Using the formula
Hence, the length of board=18.5 in