5(x + 30)
x + 30 represents the number of minutes per day he practices
5 is the number of days he practices
so 5(x+30) = the total number of minutes he practices in 5 days
For example, if he practices the piano for 20 minutes per day and the violin for 30 minutes per day, he practices a total of 50 minutes per day. For 5 days that would be 5 x 50 = 250 minutes in 5 days.
Plug that into the equation
5(x+30) = 5(20+30) = 5(50) = 250
She has 4 groups all together. 3 groups with ten rocks each and 1 group with 8 rocks(8/10).
Answer:
8x+1
Step-by-step explanation:
4(x-1) + (x+2) + 3(x+1)
4x-4 + x+2 + 3x+3
combine all x
4x+x+3x= 8x
combine all numbers without variables
(-4) + 2+3=1
8x+1
The answer is D. C ÷ d = π, where C is circumference and d is diameter.
4.5*10^-1 =0.45
2*10^-2 = <span>=<span>150 </span></span><span>(Decimal: 0.02)</span>
