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Naddik [55]
3 years ago
6

4-9 ik this is probably easy but I’m stuck so ue

Mathematics
2 answers:
docker41 [41]3 years ago
7 0
4) square
5) trapezoid
6) rhombus
7) kite
8) parallelogram
9) rectangle
Lady bird [3.3K]3 years ago
4 0
4-9= -5 that is the answer
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The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes)
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Answer: $19.6

Step-by-step explanation:

Linear function: f(x)=mx+c

, where  m= rate of change in f(x) with respect to x.

c = Initial value.

Let c = Initial value of card , m= Charge per minute

x= Number of minutes calling time.

Then, 25.06= 38m+c   (i)

21.03=69m+c (ii)

Eliminate (ii) from (i)

4.03=-31m\\\\\Rightarrow\ m=\dfrac{4.03}{-31}\\\\\Rightarrow\ m=-0.13

Put m in (i) , we get

25.06= 38(-0.13)+c\\\\\Rightarrow\ 25.06=-4.94+c\\\\\Rightarrow\ c=25.06+4.94\\\\\Rightarrow\ c=30

i.e. f(x)=-0.13x+30

if x=80 then

f(80)= -0.13(80)+30

=-10.4+30

=19.6

Hence, the remaining credit after 80 minutes of calls = $19.6

7 0
3 years ago
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Basile [38]

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Step-by-step explanation:

the 5y and the negative one cancel each other out. add the rest together you end up with 5x=-15. and divide each side by 5. you'll end up with x=-3

6 0
3 years ago
The sum of the ages of two siblings is 29. The brother is eleven more than half the age of his sister. How old is each sibling
mina [271]

Answer: the brother is 20 and the sister is 9

Step-by-step explanation:

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Jamal will cut a piece of wood that is 3 1/2 feet long into 1/4 foot sections. How many sections will result? plz help
Ray Of Light [21]

Answer:

Hi there the answer is 10

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Step-by-step explanation:

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