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marissa [1.9K]
2 years ago
8

−3(2.5−k)+0.5(7+8k) simplified please help

Mathematics
1 answer:
scZoUnD [109]2 years ago
5 0

Answer:

7k−4

Step-by-step explanation:

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3 years ago
I feel like it’s either answer 2 or 4. i just don’t understand the -9 part
harina [27]

Answer:

n < 27

Step-by-step explanation:

let the number be n

\frac{1}{3} n - 3 < 6 \\ add \: 3 \: to \: both \: sides \\  \frac{1}{3}n - 3 + 3  <  6 + 3 \\  \frac{1}{3} n  <  \\  9 \\ multiply \: both \: sides \: by \: 3 \\  \frac{1}{3} n  \times 3< 9 \times 3 \\ n < 27

8 0
3 years ago
Which equation is part of solving the system by substitution?
gayaneshka [121]

Answer:

4(11-y)²-3y²=8

Step-by-step explanation:

x+y=11

x=11-y

5 0
3 years ago
Read 2 more answers
The difference of two numbers is 9 and the sum of the numbers is 55. What are the numbers? Please show procedure.
valentina_108 [34]
X/y=9
x+y=55
x=-y+55
-y+55/y=9
-y+55=9y
-10y=-55
y=5.5
x=49.5
8 0
3 years ago
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