well, let's keep in mind that the SAS postulate, so if one Side and the Angle next to it and the following Side after the angle are equal on both triangles, both triangles are congruent. Now, we have the angle 30° with sides and 9 and 2x and sides 9 and x + 4, well, the 9's are equal, dohh, you know, if only the 2x = x + 4, we'd be golden

$2x = x + 4\implies 2x - x = 4\implies \boxed{x = 4}$

7 0

3 years ago

How do you solve this?

oksian1 [2.3K]

Answer:

X=73/7

Step-by-step explanation:

7 0

3 years ago

What is the reason for each step in the solution of the inequality?<br><br> −2(x+3)−4>4x+30

DochEvi [55]

You would have to first distribute the -2 to the x+3 which gives you -2x-6. Then you would subtract the 4 which gives you -2x-10 on the left side. Now you have the equation -2x-10>4x+30. Move the 4x to the other side giving you -6x-10>30. Now add the 10 from the other side which leaves you with -6x>40. Now remember when you divide by a negative in an inequality, you HAVE TO flip the sign giving you the answer of x<-20/3.

5 0

3 years ago

Read 2 more answers

HELP !!!!!!!!!!!!!!!!!!!!!!!

Lelu [443]

Answer:

25 $\pi$ Or 78.5 units³

Step-by-step explanation:

1/3πr²h

1/3xπx25x3=25π or 78.5

7 0

3 years ago

Read 2 more answers