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GuDViN [60]
3 years ago
7

Janet has $120. If she saves$20 per week, in how many days will she have $500?

Mathematics
1 answer:
maxonik [38]3 years ago
8 0
She will have $500 in 5 days because when she takes out the 20 every week she will have had $100 so to make $500 she will have to have made 5 $100
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A spherical weather balloon is being inflated. The radius of the balloon is increasing at the rate of 9 cm/s. Express the surfac
Zolol [24]
Since a sphere's surface area is 4πr², we then need to find r as a function of time t, which is 9t (since it increases by 9 every second)+0 (the initial value)=9t. Plugging it in, we get 4π(9t)²=4π*36t²=144πt²
8 0
3 years ago
P(x)=x^6-11x^5+30x^4<br><br> Number 15
MA_775_DIABLO [31]

Answer:

what do we need to do with number 15

Step-by-step explanation:

8 0
3 years ago
Evaluate the expression when c= -4.<br> c² – 5c+2
Fiesta28 [93]

Answer:

The answer is 38.

Step-by-step explanation:

You have to substitue c = -4 into the expression :

Let c = -4,

{( - 4)}^{2}  - 5( - 4) + 2

= 16 + 20 + 2

= 38

4 0
3 years ago
A red die, a blue die, and a yellow die (all six sided) are rolled. we are interested in the probability that the number appeari
NISA [10]

5/54 or approximately 0.092592593  
There are 6^3 = 216 possible outcomes of rolling these 3 dice. Let's count the number of possible rolls that meet the criteria b < y < r, manually.
 r = 1 or 2 is obviously impossible. So let's look at r = 3 through 6.
 r = 3, y = 2, b = 1 is the only possibility for r=3. So n = 1
 r = 4, y = 3, b = {1,2}, so n = 1 + 2 = 3
 r = 4, y = 2, b = 1, so n = 3 + 1 = 4
 r = 5, y = 4, b = {1,2,3}, so n = 4 + 3 = 7
 r = 5, y = 3, b = {1,2}, so n = 7 + 2 = 9
 r = 5, y = 2, b = 1, so n = 9 + 1 = 10
 
 And I see a pattern, for the most restrictive r, there is 1 possibility. For the next most restrictive, there's 2+1 = 3 possibilities. Then the next one is 3+2+1
= 6 possibilities. So for r = 6, there should be 4+3+2+1 = 10 possibilities.
Let's see
 r = 6, y = 5, b = {4,3,2,1}, so n = 10 + 4 = 14
 r = 6, y = 4, b = {3,2,1}, so n = 14 + 3 = 17
 r = 6, y = 3, b = {2,1}, so n = 17 + 2 = 19
 r = 6, y = 2, b = 1, so n = 19 + 1 = 20 
 And the pattern holds. So there are 20 possible rolls that meet the desired criteria out of 216 possible rolls. So 20/216 = 5/54.
6 0
3 years ago
Use the GCF of the terms to write the expression as the product of two factors with integer coefficients.
Alchen [17]
The greatest common factor (GCF) is determined by finding the greatest factor that would simplify all the terms of the equation the most. 

For the equation -2x³ - 4x² + 4x
The common factor for the coefficients -2, -4 and 4 is -2, since all of them are divisible by -2.
The common factor for the variables x³, x² and x is x, since all of them are divisible by x.

Then, the GCF would be -2x. We use this to simplify the equation:

-2x(x² + 2x -2)
7 0
3 years ago
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