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jeka57 [31]
3 years ago
11

Julias text messaging plan costs $8 for the first 400 messages and 20e for each additional text message. If she owes $24.00 for

text messaging in the month of
September, how many text messages did she send that month?
Mathematics
1 answer:
Makovka662 [10]3 years ago
4 0

Answer:

160 is the answer because 8x20 is 160 also 20÷400 is 20 so that made pretty good sense

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M(x)=−(x−5) 2 +25m, left parenthesis, x, right parenthesis, equals, minus, left parenthesis, x, minus, 5, right parenthesis, squ
Aleksandr [31]

Answer:

25

Step-by-step explanation:

Given the function that represents the amount of mosquitoes as;

M(x) = -(x-5)² + 25

To get the maximum mosquitoes possible, we need to first find x;

At the maximum dM/dx = 0

dM//dx = -2(x-5)

0 = -2(x-5)

-2(x-5) = 0

-2x + 10 = 0

-2x = -10

x = 10/2

x = 5

Substitute x = 5 into the function;

M(5) = −(5−5)² +25

M(5) = 0+25

M(5) = 25

Hence the maximum number of mosquitoes is 25

8 0
3 years ago
What os the domain of the given function
kramer
I need to see the function In order to do this
6 0
3 years ago
2. An online bookstore sells both print books and e-books (books in an electronic format). Customers can pay with either a gift
Fudgin [204]

Answer:

a.0.12

b. Dependent

Step-by-step explanation:

a. The two events mentioned here are " print book is purchases" and "customer using gift card". P(P)=0.6 and P(C)=0.2. we have to calculate the probability of print book selection for purchase and payment is made through gift card i.e. P(P∩C). P(P∩C)=P(P)*P(C)=0.6*0.2=0.12.

b. If P(A∩B)=P(A)*P(B), then the two events are independent. Here in the given situation two independent variables are "purchase of e-book" and  "payment made using gift card"

P(E)=0.4

P(G)=0.2

P(E and G)=P(E∩G)=0.1

P(E)*P(G)=0.4*0.2=0.08 that is not equal to 0.1. So, the two events "e-book is purchased" and "Payment made by customer using gift card" are not independent.

5 0
3 years ago
Tom knows that in his school 10 out of every 80 students are left-handed. There are 384 students in toms school. How many studen
Vika [28.1K]
Answer:

C (48)

explanation:

firstly, divide 384 by 80. This gives you 4.8. So, since 10 out of every 80 students are left handed we have to times 4.8 by 10 which gives you 48.
4 0
3 years ago
Given: The
gtnhenbr [62]

Answer:

a=8.2

Step-by-step explanation:

3 0
2 years ago
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