Question

please help me in this question please ​

Answer 1

Answer:

x = 18

Step-by-step explanation:

the square on the angle means the angle is 90 degrees

4x + x = 90

5x = 90

x = 18

Answer 2

Answer:

$\boxed{\bf x = 1 {8}^{o} }$

Step-by-step explanation:

In the given figure....

$\boxed{\bf m\angle BOA = 9 {0}^{o}}$

$\bf m\angle BOA + m\angle COA = 9 {0}^{o}$

• $\bf 4x + x = 9 {0}^{o}$

Combine like terms. 4x + x = 5x

• $\bf 5x=90$

Divide both sides by 5.

• $\bf \cfrac{5x}{5} = \cfrac{90}{5}$
• $\boxed{\bf x = 1 {8}^{o} }$