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Lera25 [3.4K]
2 years ago
8

What the power a when 5^a = 1/125

Mathematics
1 answer:
Advocard [28]2 years ago
3 0

Answer:

a = -3

General Formulas and Concepts:

<u>Algebra I</u>

  • Solving Exponential Equations
  • Exponential Property [Rewrite]: \displaystyle b^{-m} = \frac{1}{b^m}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

<em />\displaystyle 5^a = \frac{1}{125}<em />

<em />

<u>Step 2: Solve for </u><em><u>a</u></em>

  1. Rewrite:                                                                                                                \displaystyle 5^a = \frac{1}{5^3}
  2. Rewrite [Exponential Property - Rewrite]:                                                       \displaystyle 5^a = 5^{-3}
  3. Set:                                                                                                                    \displaystyle a = -3
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The lines (m-2)x+y=2 and mx+2y=k intersect at (2,8). Find the values of m and k
Lerok [7]

Step-by-step explanation:

(m - 2)x + y = 2

y = -(m - 2)x + 2

8 = -(m - 2)(2) + 2

6 = -(m - 2)(2)

3 = -(m - 2)

-3 = m - 2

-1 = m

mx + 2y = k

2y = -mx + k

y =  -  \frac{1}{2} mx +  \frac{k}{2}  \\ y =  \frac{1}{2} x +  \frac{k}{2}  \\ 8 =  \frac{1}{2} (2) +  \frac{k}{2}  \\ 7 =  \frac{k}{2}  \\ 14 = k

4 0
3 years ago
A 32-ounce jar of a barbecue sauce costs $8.00, while an 8-ounce jar of the same
GrogVix [38]

Answer:

Jennifer would save $0.25 per ounce.

Step-by-step explanation:

With the 32-ounce jar, the price per ounce is $0.25 per ounce. With the 8-ounce jar, the price is $0.50 per ounce. Jennifer would do better to buy the 32-ounce jar, as she would save $0.25 per ounce with that choice.

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3 years ago
Number two please <br> ASAP
miv72 [106K]

The solutions for -5 +2x^{2} = -6x is option 3. x= \frac{-6 \pm \sqrt{36-4 (2)(-5)}}{4} .

Step-by-step explanation:

Step 1:

First, we must bring the equation to the form of ax^{2} +bx +c =0.

So -5 +2x^{2} = -6x becomes 2x^{2} +6x-5=0.

The value of a is the coefficient of the x^{2} term, the value of b is the coefficient of x term and c is the coefficient of the constant term.

Comparing the above equation to ax^{2} +bx +c =0, we get a = 2, b = 6, and c=-5.

We have the formula x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}.

Step 2:

By substituting the known values, we get

x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a} =\frac{-6 \pm \sqrt{6^{2}-4 (2)(-5)}}{2 (2)}.

\frac{-6 \pm \sqrt{6^{2}-4 (2)(-5)}}{2 (2)} = \frac{-6 \pm \sqrt{36-4 (2)(-5)}}{4} .

This is the third option.

8 0
4 years ago
What is 40x-x because i dont know?
abruzzese [7]

Answer:

39x

Step-by-step explanation:


6 0
3 years ago
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Given:

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Therefore, the total money you will make this month is $600.

3 0
3 years ago
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