Each as a fraction 42/100 35/100 18/100 100/100
Answer:
Disagree
Step-by-step explanation:
Remember rotating 90 degrees means (y,-x)
A= (1,2)
A'= (2,-1)
So it is disagreed.
Hope this help :)
Answer:
11. 78
12. 4x² - 3x - 1
Step-by-step explanation:
11. Sum of n whole numbers = ½(n² + n)
Multiply
½*n² + ½*n
= n²/2 + n/2
To find the sum of the first 12 whole number, substitute 12 for n into the equation.
= 12²/2 + 12/2
= 144/2 + 12/2
= 72 + 6
= 78
12. Area of trapezoid = ½(a + b)*h
Where,
a = 5x - 4
b = 3x + 2
h = x + 1
Area = ½(5x - 4 + 3x + 2)*(x + 1)
Area = ½(8x - 2)*(x + 1)
Area = ½[8x(x + 1) -2(x + 1)]
= ½[8x² + 8x - 2x - 2]
Add like terms
= ½(8x² - 6x - 2)
= ½(8x²) - ½(6x) - ½(2)
= 4x² - 3x - 1
Answer:
68
Step-by-step explanation:
12 + 5 = 17
17 x 4 = 68
Andrea's monthly allowance is $68.
Answer:
range=14
mode=9
median =9
mean =12
Step-by-step explanation:
range is B-S=20-6
mode is most common
median put in order find middle value 6,9,9,9,9,11,13,16,18,20
mean is add all divide by how many 9+9+9+9+6+11+13+16=120/10
If i get one wrong i am sorry
