674-392=282 so the answer would be 282 girls who participated
3+√x+19-√2x replace x by 6===> 3+√6+19-√2*6 = 3+√6+19-√12
Note that √12 = √2x6 = √2 x √6 ===>3+√6+19-(√2) x (√6)
=√6(1+√2)+22
Answer:
8 hours
Step-by-step explanation:
11 hours = $176
⇒ 1 hour = $176 ÷ 11 = $16
To determine how many hours she would have to work to make $128, divide $128 by $16:
⇒ number of hours = $128 ÷ $16
= 8 hours
Answer:
x=5
Step-by-step explanation:
4x-3=2x+7
subtract 2x from both sides
2x-3=7
add 3 to both sides
2x=10
divide both sides by 2
x=5
Answer:
g = -32
Step-by-step explanation:
3 = g/-4 - 5
Multiply both sides of the equation by -4
-12 = g + 20
Swap sides so that the variable terms are on the left hand side
g + 20 = -12
Subtract 20 from both sides
g = -12 - 20
Subtract 20 from -12 to get -32
g = -32