omontlepege37
omontlepege37 omontlepege37
  • 24-06-2021
  • Mathematics
contestada

help me please I'm struggling ​

help me please Im struggling class=

Respuesta :

surjithayer10otahza surjithayer10otahza
  • 26-06-2021

Answer:

Step-by-step explanation:

1.

[tex]-4\leq \frac{x+5}{3} \leq 7\\multiply~each~inequality~by~3\\-12\leq x+5\leq 21\\subtract~5~from~each~inequality\\-17 \leq x\leq 16[/tex]

2.

cosθ+sinθ tan θ

=cosθ+sin θ×(sinθ)/(cosθ)

[tex]=\frac{cos^2 \theta+sin ^2 \theta}{cos \theta} \\=\frac{1}{cos \theta} \\=sec \theta[/tex]

3.

x²+(y-6)²=35

x²+y²-12y+36=35

x²+y²-12y+1=0

put x=r cosθ

y=r sin θ

square and add

x²+y²=r²cos²θ +r² sin²θ=r² (cos² θ+sin² θ)=r²

r²-12rsinθ+1=0

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