Answer:
(6, - 1 )
Step-by-step explanation:
Given the 2 equations
x + 7y = - 1 → (1)
- 4x - 2y = - 22 → (2)
Rearrange (1) expressing x in terms of y by subtracting 7y from both sides
x = - 1 - 7y → (3)
Substitute x = - 1 - 7y into (2)
- 4(- 1 - 7y) - 2y = - 22 ← distribute and simplify left side
4 + 28y - 2y = - 22
4 + 26y = - 22 ( subtract 4 from both sides )
26y = - 26 ( divide both sides by 26 )
y = - 1
Substitute y = - 1 into (3) for corresponding value of x
x = - 1 - 7(- 1) = - 1 + 7 = 6
Solution is (6, - 1 )
Step-by-step explanation:
Area of Traingle=1/2×b×h
192cm²=1/2×24×h
192cm²=12×h
h=192/12
h=16cm
Hypotenuse ²=Base²+Altitude ²
Hypotenuse ²=12²+16²
Hypotenuse ²=144+256
Hypotenuse ²=400
Hypotenuse =20cm
Perimeter=20+20+24
=64cm
Answer:
x^2+17x+91=0
a = 1; b = 17; c = +91;
Δ = b2-4ac
Δ = 172-4·1·91
Δ = -75
Delta is less than zero, so there is no solution for the equation
Step-by-step explanation:
The elapsed time is B, 2 hours and 25 minutes.
Answer:
D
Step-by-step explanation:
2 terms
