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lawyer [7]
3 years ago
15

What is the solution of.... -2k+8<14 or 3k+1< 1

Mathematics
2 answers:
ziro4ka [17]3 years ago
7 0
Work shown:
-2k+8-8<14-8
-2k<6
-2k/-2>6/-2
k>-3

or
3k+1<1
3k+1-1<1-1
3k<0
3k/3<0/3
k<0

{k|k>-3 or k<0}
Alina [70]3 years ago
3 0
I think its -2k+8<14
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$21.95 + $.19x = $18.95 + $.21x

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2 years ago
An easy question all wrong or unhelpful or no-work answers will be reported.
miss Akunina [59]
Elimination:

7x - 3y = 20
5x + 3y = 16
(add)
12x = 36
÷ 12
x = 3

(5 × 3) + 3y = 16
15 + 3y = 16
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3y = 1
÷ 3
y = 1/3

Substitution:

5x + 3y = 16
- 3y
5x = 16 - 3y
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x = 3.2 - 0.6y

5(3.2 - 0.6y) + 3y = 16
16 - 3y + 3y = 16
16  = 16
- 16
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Sorry the substitution messed up for some reason, I'll fix it after I've answered the other question

6 0
3 years ago
I need helppppppp plzzzzzz
Zanzabum
14 x 10^3 = 14,000 (the elephants weight)

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3 0
3 years ago
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The chemistry class was making 300 gallons of 30% isopropyl alcohol. They mixed 12% with 42%. How much of each did they use?
alexgriva [62]

Answer:

<u>The chemistry class mixed 120 gallons of 12% isopropyl alcohol and 180 gallons of 42% isopropyl alcohol.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of isopropyl alcohol made by the chemistry class = 300 of 30%

Amount of 12% isopropyl alcohol mixed by the chemistry class = x

Amount of 42% isopropyl alcohol mixed by the chemistry class = 300 - x

2. How much of each did they use?

Let's write our equation to solve for x, this way:

30% = 0.3, 12% = 0.12, 42% = 0.42

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12x + 126 - 0.42x = 90

-0.3x = 90 - 126

-0.3x = -36

x = -36/-0.3

<u>x = 120 ⇒ 300 - x = 180</u>

<u>Let's prove x = 120 is correct</u>

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12 * 120 + 0.42 (300 - 120) = 0.3 * 300

14.4 + 75.6 = 90

90 = 90

<u>We proved x = 120 is correct</u>

5 0
3 years ago
PLZZ HELP <br> 2/3 divided by 5
melamori03 [73]

Answer:

2/15

Step-by-step explanation:

2/3 divided 5 is really just:

2/3*1/5

that is just 2/15!

7 0
2 years ago
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