I'd start by writing an equation for each of the right triangles. (Pythagorean theorem)
y² + 9² = z²
x² + z² = (4+9)²
4² + y² = x²
we want to find z so combine the equations by substituting the other variables x,y out.
substitute y² for (x² - 4²) in 1st equation.
(x² - 4²) + 9² = z²
now by rearranging the 2nd equation we can substitute x² for (13² - z²)
(13² - z²) - 4² + 9² = z²
169 - z² - 16 + 81 = z²
234 - z² = z²
234 = 2z²
234/2 = z²
117 = z²
√(117) = z
√(9*13) = z
3√(13) = z
13 goes in the box
Answer:
C
Step-by-step explanation:
Using the rule of radicals
× 
⇔ 
Simplify 
= 
= 
× 
= 3
Then
4 - 3
= → C
25 degrees is the answer. CBE is supplementary to ABC. That means those two angles add up to 180 degrees.
Answer:
16
Step-by-step explanation:
12 pounds: 4 weeks
48 pounds: 16 weeks
Answer:
X <u><</u> 5
Step-by-step explanation:
So when they say 'no more than' its basically like 'less than or equal to' which means that it could be less than 5 or equal to 5 but just be careful when the question says 'at least' because that means 'greater than or equal' so here you could write a number that's greater than (number) or equal to (number)
