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user100 [1]
3 years ago
8

I need help. please show your work!

Mathematics
2 answers:
vodomira [7]3 years ago
8 0
X =  10 * 3^n
*************************************************************





tresset_1 [31]3 years ago
4 0
Exponential function has form y = a(b)^x

we see that when x = 0, then y = 10. Substitute those values to solve for an unknown

10 = a(b)^0

since b^0 is 1 we are left with a = 10.

we have y = 10(b)^x

to find b, use another point on the table. when x = 1, y = 30 so

30 = 10(b)^1
30 = 10b
b = 30/10
b = 3

function: y = 10 · (3)^x

(can also notice that y-values are all being mutliplied by 3)
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The line 2x + 3y = -6 intersects the x axis at (a,0) and the y axis at (0,b) what is a + b ?
USPshnik [31]
2x + 3y = -6 (Subtract 2x from both sides)
3y = -2x - 6 (Divide both sides by 3 to isolate x) which will give you y = -2/3x - 2 and this graphed would cross the x-axis at (-3,0) and the y-axis at (0, -2). So a + b = -5
3 0
3 years ago
Element X is a radioactive isotope such that every 90 years, its mass decreases by half. Given that the initial mass of a sample
steposvetlana [31]

Answer:

approximately 27 grams

Work Shown:

Half life formula

y = A*(0.5)^(x/H)

where,

A = starting amount = 30 grams

H = half life period = 90 years

x = number of years that pass by = 12

y = amount left over after x years

Let's plug the values for x, A and H into the formula to find y

y = A*(0.5)^(x/H)

y = 30*(0.5)^(12/90)

y = 27.3516746567466

y = 27 .... rounding to the nearest whole number

4 0
3 years ago
You have 12 CDs and choose 4 of them to play one evening. How many
e-lub [12.9K]

Answer:

3 orders of CDs

Step-by-step explanation:

So if you have 12 CDs and you are choosing 4 for one evening you get 8 more CDs for 3 evening.So what i did is 12 - 4 and it is equal to 8 CDs and  You divide 4 in to 12 and it gives you 3.Your answer is 3 order of CDs because the question is asking how many order of CDs are possible for playing 4 CDs?

4 0
3 years ago
Select the correct answer. A company employs 48 people in various departments. The average annual salary of each employee is $25
Anna35 [415]

Answer:

A. $1,056,000 ≤ x ≤ $1,344,000

Step-by-step explanation:

The average annual salary of each of the 48 employees is given as;

$25,000

The total salary that the company pays to its employees annually is thus;

$25,000 * 48 = $1,200,000

Now, the total annual maximum variance  of the employees salaries would be;

$3,000 * 48 = $144,000

The lower limit of the total salary that the company pays to its employees annually is calculated as;

$1,200,000 - $144,000 = $1056000

The upper limit of the total salary that the company pays to its employees annually is calculated as;

$1,200,000 + $144,000 = $1344000

Therefore, the range of the total salary that the company pays to its employees annually is;

$1,056,000 ≤ x ≤ $1,344,000

8 0
3 years ago
What is 18 8/16 rounded to the nearest whole number?
Angelina_Jolie [31]
18 8/16 = 18.5....rounded to the nearest whole number = 19
4 0
3 years ago
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