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3 years ago

Help me on this someone please I need it done now

Mathematics

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

1. yes, yes

2. yes, yes

3. (bottom of 1) no, no

4. no, yes

Might be right

Step-by-step explanation:

DedPeter [7]3 years ago

6 0

Answer:

first graph (with the traingles) is congruent

second graph (with L-shapes) is congruent

third graph with circles is similar

fourth graph with rectangles is similar

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in a new clothing store, she charges 21.75 for each sweatshirt she sells. what was the revenue if she sold 51 sweatshirts last m

finlep [7]

Answer:

Step-by-step explanation:

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3 years ago

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Find the derivative of f(x) = -2x2 + 11x at x = 9.<br>a) -25<br>b) -243<br>c) 63<br>d) 19

MissTica

$\bf f(x)=-2x^2+11x\implies \left. \cfrac{df}{dx}=-4x+11 \right|_{x=9}\implies -4(9)+11\implies -25$

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4 years ago

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For the current reaction, 2NO2 ↔ N2O4, we have:

vivado [14]

<h3>Answer:</h3>

$\displaystyle K_c \approx 0.0424$

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Equilibrium</u>

Equilibrium Constant K
Concentrations - Denoted in [Brackets]

<h3>Step-by-step explanation:</h3>

<u>Step 1: Define</u>

[RxN] 2NO₂ ⇆ N₂O₄

[Equilibrium Rate Law] $\displaystyle K_c = \frac{[N_2O_4]}{[NO_2]^2}$

NO₂ = 11.95 M

N₂O₄ = 6.05 M

Substitute [ERL]: $\displaystyle K_c = \frac{[6.05]}{[11.95]^2}$
Exponents: $\displaystyle K_c = \frac{[6.05]}{[142.803]}$
Divide: $\displaystyle K_c = 0.042366$
Round (Sig Figs): $\displaystyle K_c \approx 0.0424$

This value of K tells us that the reactants are favored in the equilibrium reaction (K < 0.1).

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3 years ago

What is the answer to this 3a^2-9a

olchik [2.2K]

If i'm correct, the answer should be

-3a

hope this helped! 8)

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3 years ago

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What is the value of the expression (2 1/4 - 7 1/2) - (-1 1/4)

JulsSmile [24]

Answer:

-4

Step-by-step explanation:

2 1/4 - 7 1/2 = -5.25

-5.25 - (-1 1/4) = -4

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3 years ago

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