180 cm goodluck and keep your head up!
The height of the building is 19.02 feet, for a 20-ft ladder to lean against the building at an angle of 72 degrees.
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
Trigonometric ratio is used to show the relationship between the sides and angles of a right angle triangle.
Let h represent the height of the building, hence:
sin(72) = h/20
h = 19.02 feet
The height of the building is 19.02 feet, for a 20-ft ladder to lean against the building at an angle of 72 degrees.
Find out more on equation at: brainly.com/question/13763238
#SPJ1
Make a diagonal line like this / connected to it make the same / but mirrored or backwards underneath make a connecting like this _
<u>HOW CAN HE CHECK HIS ANSWER:</u>
HE CAN CHECK HIS ANSWER BY PLUGGING IN HIS X VALUE, AFTER HE GETS THE CORRECT ANSWER.
<u>SHOW THE CORRECT ANSWER:
</u> <span>3(3x+6) = 4(7x-1)
9x+18 = 28x-4
18 = 19x-4
22 = 19x
22/19 = x
</span><u>
CHECK:
</u><span>3(22/19+6)/8 = 7(22/19-1)/6
45/38 = 45/38 ( Is true)</span><u>
hope this helps!!</u>