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ra1l [238]
3 years ago
5

Plz helpppp I need these questions in 3 min

Mathematics
1 answer:
vesna_86 [32]3 years ago
5 0
Yes, what are your questions?
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Plz help me no link there is a screenshot
shepuryov [24]
55*10/2=275
The area of his roof is 275
7 0
3 years ago
Write the expression in simplest form.<br><br> (-11/2x + 3) -2 (-11/4x - 5/2) = ?
mina [271]

(-\frac{11}{2}x + 3) - 2(- \frac{11}{4}x - \frac{5}{2}) = ?

in simplest form-

(-5\frac{1}{2}x + 3) -2( 2\frac{3}{4} x -2\frac{1}{2})

6 0
3 years ago
An acid is a substance that increases the concentration of H3O+ ions in solution. Look at the reaction below of phenol (C6H5OH)
Law Incorporation [45]

Answer:

The reactant that acts as an acid, by contributing an H⁺ ion to create H3O+ in the chemical equation is C₆H₅OH.

Step-by-step explanation:

According to Brønstend-Lowry, an acid is a substance that transfer a proton (hydrogen cation, H⁺) to a base, forming a base conjugate for the first and an acid conjugate for the second.      

From the following reaction:

C₆H₅OH(aq) + H₂O(l)  →  C₆H₅O⁻(aq) + H₃O⁺(aq)

   

We have that the C₆H₅OH transfer a proton to the water to form its conjugate base C₆H₅O⁻ and the conjugate acid of water H₃O⁺. Hence, the C₆H₅OH is the acid and the water is the base.

Therefore, the reactant that acts as an acid, by contributing an H⁺ ion to create H3O+ in the chemical equation is C₆H₅OH.

I hope it helps you!

8 0
3 years ago
Read 2 more answers
I need help ASAP, all help is appreciated
navik [9.2K]

Answer:

55 degrees

Step-by-step explanation:

Looking you can see these two angles are parallel. Knowing that, since angle GHE is 55 DEC must be 55 also.

- Hope that helps! Please let me know if you need further explanation.

6 0
3 years ago
Can u help me with number 1
Snezhnost [94]
The answer is 2.07 I hope this helps. can I have brainliest
7 0
3 years ago
Read 2 more answers
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