All categories

2 years ago

3x−8−12x=42 what is x?

Mathematics

1 answer:

MA_775_DIABLO [31]2 years ago

3 0

Answer:

x = -50/9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

Step 1: Define equation

3x - 8 - 12x = 42

Step 2: Solve for x

Combine like terms: -9x - 8 = 42
Isolate x term: -9x = 50
Isolate x: x = -50/9

You might be interested in

The radius of a circle is 5 inches what is the area of a sector biunded by 180 degrees arc

AURORKA [14]

Step-by-step explanation:

$180 \times 22 \times 5 \times 5 = 9900 \\ 9900 \div 360 \times 7 = 3.929$

3 0

2 years ago

The sample of eight companies in the aerospace industry, referred to in Exercise 36, was surveyed as to their return on investme

Vera_Pavlovna [14]

Answer:

Sample Variance = 6.008

Sample standard deviation = 2.451

Step-by-step explanation:

We are given the following in the question:

10.6, 12.6, 14.8, 18.2, 12.0, 14.8, 12.2, 15.6

Formula:

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{110.8}{8} = 13.85$

Sum of squares of differences = 42.06

$s^2 = \dfrac{42.06}{7} = 6.008$

Standard Deviation =

$s = \sqrt{s^2} = \sqrt{6.008} = 2.451$

6 0

2 years ago

Lauren went to Lee's Nails to get a pedicure. Her pedicure cost $20.00 and she wanted to give a 15% tip. How much would she leav

Slav-nsk [51]

Answer:

$3 is 15% of $20.

10% of $20: $2

5% of $20: 2/2 = 1

2 + 1 = 3 or 10% + 5% = 15%

5 0

2 years ago

1200 meters is less than 1 kilometer ? True or false

Keith_Richards [23]

King Henry Died Unexpectedly Drinking Chocolate Milk
Kilo, Hecto, Decca, The unit (meters), Deci, Centi, Milli
1000 100 10 1 0.1 0.01 0.001

TL;DR - 1000 meters is as much as 1 kilometer, so 1200 meters is more than 1 kilometer

7 0

3 years ago

Read 2 more answers

Please solve for y, with steps. Thank you

Dafna11 [192]

Answer:

We have been given an equation

(1) $x^2+(y-\sqrt[3]{x^2})^2=1$

On simplification by shifting $x^2$ on right hand side of the given equation.

$(y-\sqrt[3]{x^2})^2=1-x^2$

Further simplification removing root from left will lead to whole square on right hand side of the equation.

$y=\sqrt{1-x^2}+\sqrt{3}{x^2}$

(2)Table:

x y

-0.775 1.344

0 1

0.775 1.344

(3) Graph is attached in the attachment.

3 0

3 years ago