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harkovskaia [24]
3 years ago
11

−4(x−7)=36what is x.

Mathematics
2 answers:
prohojiy [21]3 years ago
7 0
-4x + 28 = 36
28 = 36 + 4x / - 36
-8 = 4x 
-2 = x
Harrizon [31]3 years ago
6 0
You would distribute the -4. Then minus the 28 from both sides, divide by -4 on both sides to get your answer. Your answer is -2.
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A 6 cm long spring extends to 9 cm when a 1 kg load is suspended from it. What would be its length if a 2 kg load were suspended
vampirchik [111]

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Step-by-step explanation:

To calculate the length of a spring with a 2 kg load, compare the displacement of a 1 kg load and adjust accordingly.

When a 1 kg load is suspended from the spring, the spring which is 6 cm stretches to 9 cm. This is 3 cm longer due to the weight. If you attach a weight which is twice as much then the displacement will be twice as much. Instead of stretching an additional 3 cm, it will stretch 2*3 = 6 cm. Add this to the length of the spring and it stretches in total 6 + 6 = 12 cm.

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3 years ago
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4 0
3 years ago
Find the difference (4ab-9a-8)-(7ab-1)
OLga [1]
(4ab - 9a - 8) - (7ab - 1)
distribute (multiply) the negative through the parenthesis
<span>(4ab - 9a - 8) - 7ab + 1
No need for other parenthesis because nothing in front or to combine inside. </span>
<span>4ab - 9a - 8 - 7ab + 1 </span>
Combine like terms
- 3ab - 9a - 7


7 0
3 years ago
Jan spent 3 3/4 hours doing homework last week. She spent
olchik [2.2K]

Answer:

6/4

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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