Answer:
150
Step-by-step explanation:
Say: centimetre=u
---------------------
3u*7u
=3*7*u*u
=3*7*u²
=21u²
=21cm²
Answer:
2x-5y-20=0
Step-by-step explanation:
2y=-8+4/5x
2y+8-4/5x=0
10y+40-4x=0
5y+20-2x=0
-2x+5y+20=0
2x-5y-20=0
2x - 5y = 11. (4, a). x = 4, y = a
Substituting into 2x - 5y = 11
2(4) - 5(a) = 11
8 - 5a = 11
-5a = 11 - 8
-5a = 3
a = 3/-5 = -3/5 =- 0.6
Other coordinate = -3/5 = -0.6
Answer:
b. (3,0)
e. (5,-6)
f. (2,1)
Are solutions to the system of inequalities
Step-by-step explanation:
b. (3,0)
0 ≤ -2(3) + 6
0 ≤ 0 is true
3 > 1 is true
e. (5,-6)
-6 ≤ -2(5)+6
-6 ≤ -4 is true
5 > 1 is true
f. (2,1)
1 ≤ -2(2)+6
1 ≤ 2 is true
2 > 1 is true
