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adell [148]
3 years ago
8

Are the expressions -0.5(3x + 5) and -1.5x + 2.5 equivalent? Explain why or why not.

Mathematics
1 answer:
Vikki [24]3 years ago
5 0
No, they are not equivalent because if you distribute the -0.5 in the expression -0.5(3x+5) you will get -1.5x-2.5 which is not the same as -1.5+2.5
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kherson [118]
(9 - 7 × 3 + 4)²
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(-12)²
144
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3 years ago
Write 3/60 as a fraction in its simplest form
mart [117]

Answer:

\frac{1}{20}

Step-by-step explanation:

\frac{3}{60}=\frac{1}{20}

To get \frac{1}{20} you needed to divide the numerator and denominator by 3.

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3 years ago
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Find the slope of the line y = 1/6x + 3/2
AURORKA [14]

Answer: 1/6

Step-by-step explanation:

Slope is the m in y=mx+b

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2 years ago
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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!
I am Lyosha [343]

Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

  • 15%, 25% and 70%

final solution:

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This includes 0.45*52l= 23.4 l acid

Let's assume:

  • amount of 15% solution= x
  • amount of 25% solution= y
  • amount of 70% solution= z
  • and we have z=2y

so there are 2 equation:

  • x+y+z=52
  • 0.15x+0.25y+0.7z=23.4

or

  • x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
  • 0.15x+0.25y+1.4y=23.4
  • 0.15x+1.65y=23.4
  • 0.15*(52-3y)+1.65y=23.4
  • 7.8-0.45y+1.65y=23.4
  • 1.2y=23.4-7.8
  • 1.2y= 15.6
  • y=15.6/1.2
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--------

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6 0
3 years ago
What is the hydronium ion (H3O+) concentration in milk if it has a pH of 8.2?
valkas [14]
The hydronium ion is H₃O⁺ and its concentration is equivalent to the H⁺ ion concentration. The H⁺ ion concentration is given by:

pH = -log[H⁺]
[H⁺] = 10^(-8.2)
[H⁺] = 6.31 x 10⁻⁹ mole/dm³

The hydronium ion concentration is 6.31 x 10⁻⁹ mole/dm³
5 0
3 years ago
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