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Radda [10]
4 years ago
8

I NEED HELP ASAP I DONT UNDERSTAND THIS!!

Mathematics
1 answer:
zheka24 [161]4 years ago
3 0

Let the cost of the hair dryer equal x.

The net cost plus a 40% markup equals 42, set up an equation and solve forex.

1.4x = 42

Divide both sides by 1.4

X = 42 / 1.4

X = 30

The net cost was £30

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Wesley ran of a mile on saturday and of a mile on sunday how many miles did wesley run in all
Afina-wow [57]
Wesley ran a total of 2 miles.
4 0
3 years ago
Write a function that will display the correlation of two discrete time sequence as a function of timeshift index k. g
forsale [732]

Answer:

1. Discrete-time signals are represented mathematically as sequences of numbers. A sequence of numbers x, in which the nth number in the sequence is denoted x[n],

1 is

formally written as

x = {x[n]}, −∞ <n< ∞, (2.1)

2. where n is an integer. In a practical setting, such sequences can often arise from periodic

sampling of an analog (i.e., continuous-time) signal xa(t). In that case, the numeric value

of the nth number in the sequence is equal to the value of the analog signal, xa(t), at

time nT : i.e.,

x[n] = xa(nT ), −∞ <n< ∞. (2.2)

Step-by-step explanation:

5 0
3 years ago
Evaluate the expression for the given value of the variable 39 +1/8n=?<br> n= -1/2
pochemuha

Answer:

<em><u>38  15/16</u></em>

Step-by-step explanation:

39 + 1/8n

Since the n = -1/2, replace the 'n' in the original equation with that number

39 + 1/8 (-1/2)

Multiply numerator-to-numerator and denominator-to-denominator

1/8 times -1/2 equals -1/16

(Because a positive times a negative equals a negative)

Now your complete equation is:

39 + -1/16

Add those numbers together to get <u>38  15/16</u>

7 0
3 years ago
Bags of sugar come in 3 sizes:
Mrrafil [7]

Answer:

Medium

Step-by-step explanation:

The computation is shown below:

The cost for the small and medium bag is shown below:

As we know that

1kg = 1000g

So 3kg = 3000g

Now for small bags

= 0.95 ÷ 250 × 3000

= £11.40

For medium bags

= £1.80 ÷ 500 × 3000

= £10.80

So here the medium bag would represent the better value

5 0
3 years ago
The expression x^2 + x + b is a perfect square trinomial. What is the value of b?
lisabon 2012 [21]

Answer:

1/4

Step-by-step explanation:

x^2+x+b= x^2+2*x+1/2+(1/2)^2= (x+1/2)^2

b= 1/4

3 0
3 years ago
Read 2 more answers
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