Answer:
x = -1 and y = -1
Step-by-step explanation:
to solve this equation we say
let
2x-5y=3.......................................... equation 1
4y-x=-3............................................equation 2
from equation 2
4y-x=-3............................................equation 2
4y + 3 = x
i.e
x = 4y + 3 ............................................. equation 3
put x = 4y + 3 in equation 1
2(4y +3) - 5y = 3
8y + 6 -5y = 3
3y +6 = 3
3y= 3-6
3y -3
divide both sides by the coefficient of y which is 3
3y/3 = -3/3
y = -1
put y = -1 into equation 3
x = 4y + 3 ............................................. equation 3
x = 4(-1) + 3
x = -4 + 3
x = -1
therefore the value of x = -1 and y = -1 respectively
Answer:
-3
Step-by-step explanation:
f(x)= x²+3x-1
f(-1)= (-1)²+3(-1)-1
= 1-3-1
= -2-1
= -3
3. 5x5x5. i am not sure if i am correct but i am assuming it is that.
Answer:
BC=QR
Step-by-step explanation:
conditions to be congruent, SSS, SAS, or ASA
Here, one side and one angle are already congruent, so another side including the angle should be same, to satisfy SAS
thus, BC=QR
Answer:
91 feet
Step-by-step explanation:
Substitute s = 2 into 155 - 16s^2.
155 - 16 * (2)^2
155 - 16 * 4
155 - 64
91 feet.