X/2.1 < or equal to 4
Hope this helps!
2x+6=x+3 this is the answer
Answer:
x = y = 15
Step-by-step explanation:
Using the sine ratio and the exact value
sin45° = 
, then
sin45° = 
= 
= ( cross- multiply )
2x = 30 ( divide both sides by 2 )
x = 15
The triangle is isosceles (45- 45- 90) , then 2 legs are congruent, so
y = x = 15
Answer:
458
Step-by-step explanation:
Margin of error = critical value × standard error
At 99% confidence, the critical value is z = 2.576.
The standard error is σ/√n = 5.4/√n.
Given the desired margin of error is 0.65:
0.65 = 2.576 × 5.4/√n
n = 458
