3 years ago

URGENT!!! PLEASE HELP! I will mark brainlist! May someone please just help me with this?

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

8 0

D= 140° because you take 180 minus the opposite angle

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6 + 4/5b = 9/10b???????

Papessa [141]

6+ 4/5b= 9/10b
⇒ 6= 9/10b -4/5b
⇒ 6= 1/10b
⇒ 6/(1/10)= b
⇒ 6*(10/1)= b
⇒ 60= b

Final answer: b= 60~

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4 years ago

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Find x if f(x) = 2x + 7 and f(x) = -1.<br> A.5<br> B.-4<br> C.-4

faltersainse [42]

Answer:

x = - 4

Step-by-step explanation:

Hi there !

if f(x) = 2x + 7 and f(x) = -1 =>

2x + 7 = - 1

2x = - 1 - 7

2x = - 8

x = - 8 ÷ 2

x = - 4

Good luck !

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3 years ago

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4 years ago

3y2+5y-(4y2+5)-8y2-(-7-3y2)

Goshia [24]

Answer:

$-6y^2+5y+2$

Step-by-step explanation:

I'm assuming you want to simplify:

$3y^2+5y-(4y^2+5)-8y^2-(-7-3y^2)$

Distribute to get rid of the ( ):

$3y^2+5y-4y^2-5-8y^2+7+3y^2$

Put like terms together:

$3y^2-4y^2-8y^2+3y^2+5y-5+7$

Combine the like terms:

$-6y^2+5y+2$

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3 years ago