The answer is C.) -x^2-2x+3
Answer:
The commutative property lets you group like terms together:
... 5x +3x +9x +20 +7
Step-by-step explanation:
If we divide the expression into 4 groups:
...[5x] +(20) +(3x +9x) +[7]
according to the commutative property of addition, we can swap the groups in curved parentheses.
... [5x] +(3x +9x) +(20) +[7]
_____
The distributive property lets you combine x terms:
... (5 +3 +9)x +27
... 17x +27 . . . . . . the simplified form of the expression
4x + 5y = -13
2(4x + 5y) = 2(-13)
8x + 10y = -26 (equation 1)
5x - 2y = -8
5(5x - 2y) = 5(-8)
25x - 10y = -40 (equation 2)
equation 1 + equation 2,
(8x + 10y) + (25x - 10y) = (-26) + (-40)
8x + 10y + 25x - 10y = -26 + -40
33x = -66
x = -2
substitute x = -2 into equation 1,
8x + 10y = -26
8(-2) + 10y = -26
-16 + 10y = -26
10y = -10
y = -1
The values of x and y are -2 and -1 respectively.
Answer:
Least: 1
Greatest: 9
1Q: 2.25
Median: 5.5
3Q: 6.75
Ascending order: 1,3,4,5,6,7,9,12
Answer:
B. 0.635
Step-by-step explanation:
Having a percent means its out of 100 so we can turn the percent into a fraction. 63.5/100
We cant have a decimal in our fraction, so we can multiply by 10 to get rid of it. (63.5*10)/(100*10)=635/1000
Since the denominator is a multiply of 10, we can convert the numerator into a decimal. .635
So your answer would be B. 0.635