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jeka57 [31]
4 years ago
11

the sum of a number and 9 is multiplied by -2 and the answer is 8 find the number. I know the answer is -5 i need a expression,

or equation. Any of them both HELP
Mathematics
1 answer:
Aleonysh [2.5K]4 years ago
8 0
-2(X+9)=8
-2X-18=8
-2X-18+18=8+18
-2X=26
-2X/-2=26/-2
X=-13

-2(X+9)=8
(-2(X+9))/-2=8/-2
X+9=-4
X+9-9=-4-9
X=-13
I'm not sure if this helps. This is what I get. Not sure about -5.
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Differentiate: y=152+26−37 <br><br> dy/dx= answer
ozzi

Answer:

\frac{dy}{dx} y=0

General Formulas and Concepts:

<u>Calculus</u>

  • The derivative of a constant is equal to 0

Step-by-step explanation:

<u>Step 1: Define function</u>

y = 152 + 26 - 37

<u>Step 2: Simplify</u>

<em>Combine like terms</em>

y = 141

<u>Step 3: Find derivative</u>

<em>Derivative of any constant will be 0.</em>

<em />\frac{dy}{dx} y=0<em />

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3 years ago
Which values of x and y are solutions to the open sentence?       4y ≥ 3x + 2   A. x = 3, y = 0   B. x = 4, y = 3   C. x = 6, y
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Your answer would be C. x = 6, y = 5
This is because if you plug the numbers in to the inequality, we get:
(4 × 5) ≥ (3 × 6) + 2
20 ≥ 18 + 2
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I hope this helps!
5 0
3 years ago
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yawa3891 [41]
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Aleksandr-060686 [28]
Here, the equation of parabola is: (-36y)=x^2
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Sladkaya [172]

Answer:

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Step-by-step explanation:

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According to this m∠AOB = 2· m∠ADB = 2· 43 = 86°

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According to this m∠BDC = m∠BOC/2 = 43°

Good luck!!!

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