Answer:
i). x³ + 9x² + yz - 15
ii). -21m³np - 8p⁵q + mnp + 4mn + 100
Step-by-step explanation:
Question (38)
i). Two expressions are -5x² - 4yz + 15 and x³+ 4x²- 3yz
By subtracting expression (1) from expression (2) we can the expression by addition which we can get expression (1).
(x³+ 4x²- 3yz) - (-5x² - 4yz + 15) = x³ + 4x² - 3yz + 5x² + 4yz - 15
= x³ + 9x² + yz - 15
ii). -15m³np + 2p⁵q - 6m³pn + mnp + 4mn - 10qp⁵+ 100
= (-15m³np - 6m³np) + (2p⁵q - 10qp⁵) + mnp + 4mn + 100
= -21m³np - 8p⁵q + mnp + 4mn + 100
Answer:
Step-by-step explanation:
y = 1 - x.....so sub 1 - x in for y back into the other equation and solve for x
5x + 4y = 1
5x + 4(1 - x) = 1
5x + 4 - 4x = 1
x + 4 = 1
x = 1 - 4
x = -3
y = 1 - x
y = 1 - (-3)
y = 1 + 3
y = 4
solution : x = -3 and y = 4 or (-3,4)
The price of the camera after this increase was 140% or 1.4
Answer:
x = 10 months
Step-by-step explanation:
Equal when 10000 - 250x = 8000 - 50 x
2000 = 200x
x = 10
Answer:
-3
Step-by-step explanation:
y - y1 = m(x - x1) m = slope
y - 5 = -3(x - 17) slope = -3
