Answer: 18.5
Step-by-step explanation:
range is where you aff all of the numbers and then divide by how many numbers their are. so all of numbers added is 148 and divide that by 8
if the number is x, then
the positive number, when added to its square (remember, its=posessive and it's is a constraction), equals 42
this can be writen as
perfect, we need to solve by making one side 0 and then factoring since if ab=0, we can assume and solve for a and b by saying that a=0 and b=0
minus 42 from both sides
now, either use the quadratic formula or complete the square or factor
I will factor
find what 2 numbers multiply to get -42 and add to get 1 (since the linear coefient is 1 and the constant is -42)
those numbers are -6 and 7
factor
set each to 0
x-6=0
x=6
x+7=0
x=-7, false since we wanted a positive number
the number is 6
Answer:
88 cm²
Step-by-step explanation:
The perimeter of each square is 22 cm
we should divide by 4 to get the length of the square
22/4=5.5 cm
so we should multiply by 2 to get the length of the rectangle
5.5*2= 11
the perimeter is :
P= 5.5+5.5+5.5+11+11+5.5+5.5+11+11+5.5+5.5+5.5 = 88 cm²
Answer:
x/7+13=32
Step-by-step explanation:
work backward so subtract 13 from 32 and get 19 multiply it by 7 and get 133, to make sure your answers right just substitute 133 back into the equation