Answer:
x ≈ 3.7 m
Step-by-step explanation:
Use the right triangle on the left to find the height h , using the sine ratio
sin39° = 
= 
( multiply both sides by 7 )
7 × sin39° = h , then
h = 4.4
Using the tangent ration on the right side right triangle, then
tan50° = 
= 
= 
( multiply both sides by x )
x × tan50° = 4.4 ( divide both sides by tan50° )
x = 
≈ 3.7 m ( to 1 dec. place )
Answer: 
Step-by-step explanation:
n(gold colored coins) = 10
n(silver colored coins) = 6
Total number of coins = 16
since there is replacement , the probability she selects 2 silver colored coins will be :
x
= 
x
=
Therefore : the probability she selects 2 silver colored coins is
Answer:
17, 18, 19, 20
Explanation:
Let the numbers be x, x + 1, x + 2, x + 3
Their sum is equals to 74
x + x + 1 + x + 2 + x + 3 = 74 (group the variables)
x + x + x + x + 1 + 2 + 3 = 74 (simplify)
4(x) + 6 = 74 (subtract both sides by 6)
4x = 68 (divide both sides by 4)
x = 17
Other numbers:
x + 1 = 17 + 1 = 18
x + 2 = 17 + 2 = 19
x + 3 = 17 + 3 = 20
