Answer:
Step-by-step explanation:
27x - 72 = 9
27x = 81
x = 3
answer is C
Answer:
Down below
Step-by-step explanation:
1. 3/4x-7-16, combine -7 and -16, 3/4x-23
2. -8+2y+4, combine -8 and 4, 2y+4
3. -4x+11x+3y, combine -4x and 11x, 7x+3y
4. 41+b-25b, combine b and -25b, 41-24b
5. -1/2(8x-2), distribute: -1/2*8x and -1/2*-2, -4x+1
6. $40, 15% off: 40(1.00-0.15)= $34
So simplifying expressions means to just combine like terms (e.g. 2 and 4, 5x and -18x, 7y and y, etc.)
Distribution means to apply the multiplication to the terms inside the parentheses (e.g. a(x+y) -> ax+ay)
Sales is just: original price * (1 - percent off by)
I hope this helps!
Answer:
D: y = 5x
Step-by-step explanation:
According to Google, a proportional relationship is one in which two quantities vary directly with each other. We say the variable y varies directly as x if: y=kx. for some constant k , called the constant of proportionality. So the only one in that form would be the y = kx.
The constant k = 5
Answer:
can't see the equation sorry
<span>f(x) =-(x+9)(x-21)
Manipulating algebrically,
We get,
</span>f(x) =-(x+9)(x-21)
= -(x^2 -21x + 9x - 189)
= -(x^2 -12x - 189)
= -x^2 + 12x + 189
Axis of symmetry = -b/2a
plugging the values,
x = -12/-2
= 6
