2 years ago

PLEASE HELP FAST 15 POINTS ANDWER IF YOU ONLY KNOW!

Mathematics

1 answer:

DochEvi [55]2 years ago

5 0

Answer:

i can see the question in ascending order

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I’m super confused can anyone solve this

Ronch [10]

Answer:

x=5°, angle A=50°

Step-by-step explanation:

8x+11x-5+90=180

19x=95

x=5°

-->A= 11x-5

= 11*5-5

=50°

4 0

2 years ago

How would I start to solve number 15? Would I use distributive property?

natita [175]

$-5-x=2x-(4x+6)$

Using the distributive property is the correct first step. $(4x+6)$ is being multiplied by -1, so distributing gives

$-5-x=2x+(-4x-6)$
$-5-x=2x+((-4x)+(-6))$

Now, using the associative property of addition, you get

$-5-x=(2x+(-4x))+(-6)$
$-5-x=(2x-4x)-6$

Simplify the right hand side:

$-5-x=-2x-6$

Add 5 and $2x$ to both sides.

$(2x+5)-5-x=(2x+5)-2x-6$

On the left side, use the associative property. On the right, commutativity and associativity:

$2x+(5-5)-x=5+(2x-2x)-6$

Simplify.

$2x-x=-1$
$x=-1$