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Norma-Jean [14]
3 years ago
9

Denzel is comparing websites for downloading music. One charges a $5 membership fee plus $0.50 per song. Another charges $1.00 p

er song, but has no
membership fee. Write and solve an equation to find how many songs Denzel would have to buy to spend the same amount at both websites.
Mathematics
1 answer:
myrzilka [38]3 years ago
6 0
It would cost 6.50 dollars because ur adding $1.00 , $0.50 , and $5
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Jennifer went to the post office for stamps. She bought the same number of 8-cent stamps and 10-cent stamps. She also bought as
mamaluj [8]
Write it out as a set of equation:
Let x be number of 8 cent stamps, y be 10 cent stamps, and z be 2 cent stamps.
x=y
z=x+y
8x+10y+2z=440
Lets first solve for x:
from x=y and z=2x(from first equation) the last equation is
8x+10x+4x=440
22x=440
x=20
know that x=20, you also know that y=20 as well, since z=x+y, z=40.
So 20 8-cent stamps, 20 10-cent stamps, and 40 2-cent stamps.
5 0
4 years ago
Read 2 more answers
Find the solution of 3 times the square root of the quantity of x plus 6 equals negative 12, and determine if it is an extraneou
Anna35 [415]
For this case we have the following equation:
 3 \sqrt{x+6}=-12
 Rewriting we have:
 \sqrt{x+6}= \frac{-12}{3}
 \sqrt{x+6}=-4
 We raise both members of the equation to the square:
 (\sqrt{x+6})^2=(-4)^2
 Rewriting we have:
 x+6=16
 x=16-6
 x=10
 It's a extraneous solution because equality is not met by substituting x = 10 in the original equation:
 3 \sqrt{10+6}=-12
 3 \sqrt{16}=-12
 3(4)=-12
 12=-12
 Answer:
 
The solution is:
 
x=10
 It's a extraneous solution

6 0
3 years ago
What equation can represent 3 increased by a numbwr x is 9
Ksivusya [100]

Answer:

fa

Step-by-step explanation:

4 0
3 years ago
Please help ASAP !!!!!
zloy xaker [14]

Answer:

i need points im really sorry

Step-by-step explanation:

7 0
3 years ago
Helppp I just need it to be explained. #7
IceJOKER [234]
#7 is the easiest one.

a + bi = -9 + 4i

see the expression on either side matches up so..
 a = -9 and b = 4
5 0
3 years ago
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