Answer:
3) D
4) B
5) A
6) 2 (x + 7)
Step-by-step explanation:
3)
D. Distributive Property
The distributive property of multiplication over addition can be used when you multiply a number by a sum.
4)
B. 2 + 8 = 8 + 2
The word "commutative" comes from "commute" or "move around", so the Commutative Property is the one that refers to moving stuff around.
5)
A. 4 x 1 = 4
The "Multiplicative Identity" is 1, because multiplying a number by 1 leaves it unchanged: a × 1 = 1 × a = a.
6)
3 ( x + 3) - X + 5
3x + 9 - x + 5
2x + 14
2 (x + 7)
Answer:
x = - 3 / 2 ( in decimal form = - 1.5)
Step-by-step explanation:
9(x - 1) - 8x = -3(x + 5)
left side: 9(x - 1) - 8x
Expand... 9x - 9 - 8x
= (9x - 8x) - 9
= 1x - 9 or <em>x - 9</em>
right side: -3(x + 5)
Expand... <em>-3x - 15</em>
combine :
x - 9 = -3x - 15
Add 9 to both sides to get x alone
x - 9 + 9 = -3x - 15 + 9
x = -3x - 15 + 9
x = -3x - 6
Add 3x to both sides
x + 3x = -3x - 6 + 3x
simplified, 4x = -6
Now divided 4 from both sides
4x / 4 = -6 / 4
simplify, x = -6 / 4
You can reduce the fraction by dividing it by 2
(-6 / 2) / (4 / 2) = -3 / 2
Hope this helps, Let me know if you have any questions !
Have a nice day :)
Answer:
Using the Slope-intercept form, the slope is - 2.
Answer:
The answer to your questions are:
15.- 45 mg
16.- 25 kg
17.- 185 pounds
18.- 6 mg
Step-by-step explanation:
D = (a M) / (a + 12)
15.-
a = 4 years
M = 180
D = (4 x 180) / (4 + 12) = 720 / 16
D = 45 mg
16.- 1 pound --------------- 0.4535 kg
55 pounds ------------ x
x = 55 x 0.4535 / 1
x = 24.94 ≈25 kg
17.- 1 pound --------------- 0.4535 kg
x --------------- 84.09 kg
x = 84.09x 1 /0.4535
x = 185.42 pounds
18.- M = 18 mg what is 1/3 of the adult dose?
M = 18/3 = 6 mg
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