Answer:
r=-10
Step-by-step explanation:
Plug in the value of t into the equation.
r=3t-1; t = -3
r=3(-3)-1
r= -10
Answer:
x=57
Step-by-step explanation:
Answer:
x = 4 and y = - 5
Step-by-step explanation:
note that the product of a complex number and it's conjugate is real
That is
(a + bi)(a - bi) where a, b are real
= a² - abi + abi - b²i²
= a² + b² ← a real number
For (4 + 5i)(x + yi) to be real
we require (x + yi) to be the conjugate of 4 + 5i , that is 4 - 5i
(4 + 5i)(4 - 5i) ⇒ x = 4 and y = - 5
Answer:
yes he can
Step-by-step explanation:
he has to pay total is : 46+46x6%=48.76$
so he can pay that
4*6*8=192
So they can have 192 choices for the pizza