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Leya [2.2K]
3 years ago
13

QUESTION ATTACHED PLZ HELP NEEDED

Mathematics
1 answer:
saw5 [17]3 years ago
4 0
Y = a (x + 3)² - 1

Let's take the point (-1;3)

3 = a ( -1 + 3)² - 1
3 = 4a - 1
4a = 4

Therefore a = 4/4 = 1

(x+3)² - 1
= x² + 6x + 9 - 1
= x² + 6x + 8

The answer would be y = x² + 6x + 8.

Hope this helps !

Photon
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Estimate an 18% tip for a $63.30 meal
andrey2020 [161]

Answer:

The tip is $11.39

Step-by-step explanation:

3 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
With a detailed explanation from the internet<br> 1/(x-5)+3/(x+2)=4
irga5000 [103]

Answer:

\boxed{ \sf x=\dfrac{4\pm\sqrt{43}}{2}}

Explanation:

\rightarrow \sf \dfrac{1}{x-5}+\dfrac{3}{x+2}=4

<u>make the denominators same</u>

\rightarrow \sf \dfrac{1(x+2)}{(x-5)(x+2)}+\dfrac{3(x-5)}{(x+2)(x-5)}=4

<u>join the fractions together</u>

\rightarrow \sf \dfrac{x+2+3x-15}{(x-5)(x+2)}=4

<u>cross multiply</u>

\rightarrow \sf x+2+3x-15=4(x-5)(x+2)

<u>simplify</u>

\rightarrow \sf 4x-13=4x^2-12x-40

<u>group the variables</u>

\rightarrow \sf 4x^2-16x-27 = 0

<u>use quadratic formula</u>

\rightarrow \sf x = \dfrac{-\left(-16\right)\pm \sqrt{\left(-16\right)^2-4\cdot \:4\left(-27\right)}}{2\cdot \:4}

<u>simplify the following</u>

\rightarrow \sf x=\dfrac{4\pm\sqrt{43}}{2}

7 0
2 years ago
Read 2 more answers
Samantha brings $34 to the county fair. First, she pays the admission fee of $8.50. Next she buys a corn dog for
gladu [14]

Answer:

12 rides

Step-by-step explanation:

First, get the total and subtract it from the expenses.

34 - 8.50 - 4.50 = 21

Then divide the answer by how much each ride costs to find the answer

21 ➗1.75 = 12

So Sam can ride 12 rides.

4 0
3 years ago
Given f(x) = x4 – 3x3 + x – 3. What is Limit of f (x) as x approaches negative 2?
leonid [27]

Answer:

35

Step-by-step explanation:

Given f(x) = x⁴ – 3x³ + x – 3. What is Limit of f (x) as x approaches negative 2?

=> f(-2) = (-2)⁴-3(-2)³+(-2)-3

= 16+24-2-3

= 35

7 0
3 years ago
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