Mathematics: Please help ASAP I don’t understand this and only answer if you know just don’t answer with random letters please

Please help ASAP I don’t understand this and only

niki209

12.02.2022

x + y + 90 = 180

x = 67

y = 23

Step-by-step explanation:

x + y + 90 = 180

x + 2 = 3y

x + y = 90

x - 3y = -2

x + y = 90

(+) -x + 3y = 2

4y = 92

y = 23

x + y = 90

x + 23 = 90

x = 67

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RioQNA

02.03.2023

See explanation below.

Step-by-step explanation:

Part A:

(i). They both correct because they could have a third degree polynomial that crosses the x-axis 3 times.

(ii). To find the zero's of the first one, set function equal to zero and use zero factor principle given as:

$\mathrm{Zero\:Factor\:Principle:\quad \:If}\:ab=0\:\mathrm{then}\:a=0\:\mathrm{or}\:b=0\:\left(\mathrm{or\:both}\:a=0\:\mathrm{and}\:b=0\right)$

So, we have:

$\mathrm{Solve\:}\:x+2=0:\quad x=-2\\\\\mathrm{Solve\:}\:x-1=0:\quad x=1\\\\\mathrm{Solve\:}\:x-2=0:\quad x=2$

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