Solve the equation n/6=12 Is I’m correct?????

An advertisement claims that a 5-pound box of detergent will wash 20 loads of laundry. A 5-pound box costs $3.50. A 15-pound box

djyliett [7]

10.00 / 10 = .66

3.50 / 5 = .70

.70 - .66 = .4

you saved .4 per load

5 0

3 years ago

For a store contest, 4 out of every 65 people who vist the store will receive a free DVD. If 455 people vist the store, how many

stealth61 [152]

I used cross multiplication and got 28

4 0

3 years ago

Helppppp meeeeeeeeeeeeeeeeee

kati45 [8]

Answer:

The length of the shortest piece is $1\textrm{ ft}$ .

The length of the medium-sized piece is $3\textrm{ ft}$ .

The length of the longest piece is $7\textrm{ ft}$ .

Step-by-step explanation:

The five-step method is GUESS method.

Given:

Length of copper wire, $L=11\textrm{ ft}$

Length of longest piece is 6 feet longer than the shortest one.

Length of the medium-sized piece is 3 times the shortest one.

Unknown:

Length of longest, medium-sized and shortest pieces of wire.

Let the length of shortest piece be $x$ feet.

Therefore, the length of longest piece is equal to $6+x$ .

And, length of the medium-sized piece is equal to $3x$ .

Evaluate:

Sum of lengths of longest, medium-sized and shortest pieces of wire is equal to the total length of wire. So,

$6+x+x+3x=11\\5x+6=11\\5x=11-6\\5x=5\\x=\frac{5}{5}=1$

Substitute and Solve:

Now, we have, $x=1$ .

Substitute 1 for $x$ and solve for each sizes of wire pieces. This gives,

Length of shortest piece = $x=1\textrm{ ft}$

Length of medium-sized piece = $3x=3(1)=3\textrm{ ft}$

Length of longest piece = $6+x=6+1=7\textrm{ ft}$

Therefore, the lengths of shortest, medium-sized, and longest pieces are $1\textrm{ ft}$ , $3\textrm{ ft}$ and $7\textrm{ ft}$ respectively.

5 0

3 years ago

Solve for X -2(5x-5.5) + 8= -9x+2-(-5)

yuradex [85]

Answer:

x = 12

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Equality Properties
Combining Like Terms

Step-by-step explanation:

Step 1: Define

-2(5x - 5.5) + 8 = -9x + 2 - (-5)

Step 2: Solve for x

Distribute: -10x + 11 + 8 = -9x + 2 + 5
Combine like terms: -10x + 19 = -9x + 7
Add 10x to both sides: 19 = x + 7
Subtract 7 on both sides: 12 = x
Rewrite: x = 12

7 0

3 years ago

I need help with math homework

kobusy [5.1K]

Answer:

A. (0, 1) and (2, -2)

B. Slope (m) = -³/2

C. y + 2 = -³/2(x - 2)

D. $y = -\frac{3}{2}x + 1$

E. $\frac{3}{2}x + y = 1$

Step-by-step explanation:

A. Two points on the line from the graph are: (0, 1) and (2, -2)

B. The slope can be calculated using two points, (0, 1) and (2, -2):

$slope (m) = \frac{y_2 - y_1}{x_2 - x_1} = \frac{-2 - 1}{2 - 0} = \frac{-3}{2} = -\frac{3}{2}$

Slope (m) = -³/2

C. Equation in point-slope form is represented as y - b = m(x - a). Where,

(a, b) = any point on the graph.

m = slope.

Substitute (a, b) = (2, -2), and m = -³/2 into the point-slope equation, y - b = m(x - a).

Thus:

y - (-2) = -³/2(x - 2)

y + 2 = -³/2(x - 2)

D. Equation in slope-intercept form, can be written as y = mx + b.

Thus, using the equation in (C), rewrite to get the equation in slope-intercept form.

y + 2 = -³/2(x - 2)

2(y + 2) = -3(x - 2)

2y + 4 = -3x + 6

2y = -3x + 6 - 4

2y = -3x + 2

y = -3x/2 + 2/2

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

E. Convert the equation in (D) to standard form:

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

$\frac{3}{2}x + y = 1$

8 0

3 years ago