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Jobisdone [24]
3 years ago
5

When 18 is subtracted from six times a certain number,the result is -42. what is the number?

Mathematics
2 answers:
vredina [299]3 years ago
7 0
Let x be the number.

Then; 

6x-18=-42 (solve for x now) 
6x=-42+18 
6x=-24 
x=-4 

Therefore, this number would be -4. 

Hope I helped :) 
Vlad [161]3 years ago
6 0
To start off, you want to create an equation. 18 subtracted six times from a certain number (let's use a variable 'x') would look like: 6x - 18.
6x - 18 = -42

Next, isolate the variable by adding 18 to both sides.
6x - 18 = -42
    + 18   + 18
       6x = -24

Lastly, solve for x.
6x/6 = -24/6
x = -4
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Glad I could help, Have a great day!
5 0
3 years ago
Read 2 more answers
A credit card company charges 18.6% percent per year interest. Compute the effective annual rate if they compound, (a) annualy,
Darina [25.2K]

Answer:

a) Effective annual rate: 18.6%

b) Effective annual rate: 20.27%

c) Effective annual rate: 20.43%

d) Effective annual rate: 20.44%

Step-by-step explanation:

The effective annual interest rate, if it is not compounded continuously, is given by the formula

I=C(1+\frac{r}{n})^{nt}-C

where

<em>C = Amount of the credit granted </em>

<em>r = nominal interest per year </em>

<em>n = compounding frequency </em>

<em>t = the length of time the interest is applied. In this case, 1 year. </em>

In the special case the interest rate is compounded continuously, the interest is given by

I=Ce^{rt}-C

(a)  Annually

I=C(1+\frac{0.186}{1})-C=C(1.186)-C=C(1.186-1)=C(0.186)

The effective annual rate is 18.6%

(b) Monthly

<em>There are 12 months in a year </em>

I=C(1+\frac{0.186}{12})^{12}-C=C(1.2027)-C=C(0.2027)

The effective annual rate is 20.27%

(c) Daily

<em>There are 365 days in a year </em>

I=C(1+\frac{0.186}{365})^{365}-C=C(1.2043)-C=C(0.2043)

The effective annual rate is 20.43%

(d)  Continuously

I=Ce^{0.186}-C=C(1.2044)-C=C(0.2044)

The effective annual rate is 20.44%

3 0
3 years ago
7. You lose three points each time you answer
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Answer:

ur down 24 pts.

Step-by-step explanation:

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...............

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serg [7]

Answer:

c. 3 / 13

d. 2 / 13

Step-by-step explanation:

c.

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So, there are 52/4= 13 cards of each suit.

Among these 13 cards, there are 3 picture cards or face cards as they are called. These are the Jack, Queen and King cards.

So, the number of total picture cards = 4*3 = 12

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theoretical probability formula: P =  favorable events/  possible events

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P = 3 / 13

d.

there are four aces and four sevens in the deck

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