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Ede4ka [16]
4 years ago
9

What does y equal in 8x+y=15

Mathematics
1 answer:
Vinil7 [7]4 years ago
8 0

You need two equation to solve for two variables exactly.

Using this one equation alone y=15-8x.

Do you have another equation?

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it took a submarine 30 seconds to sink 225 feet, moving at a constant speed. The captain wants to know how much feet does he the
icang [17]

Answer:

Dont count me if I'm wrong but if you divide 225 by 30 you get 7.5

So your answer should be 7.5

4 0
3 years ago
HURRY PLEASE<br> Which term is like -4k?<br> A. -4<br> B. -2<br> C. 12k
Igoryamba

Answer:

A.-4

Step-by-step explanation:

6 0
3 years ago
Sheila, janice, and katen, working together at the same rate, can complete a job in 3 1/3 days. Working at the same rate, how mu
pychu [463]

Answer:

Janice and Karen could do in 1 day:

  • <u>20% of the job</u>.

Step-by-step explanation:

To identify how much of the job could janice and caren do in 1 day, first, we must find how much of the job make just 1 person at the same rate:

If three persons make a job in 3 1/3 days, 1 person make the job in x:

  • 3 persons ⇒ 3 1/3 days or 10/3 days
  • 1 person ⇒ x

Then:

  • x=\frac{1 person*\frac{10}{3}days }{3 persons} (we cancel the unit "persons")
  • x=\frac{\frac{10}{3}days }{3}
  • x = 10 days

Just a person would need 10 days to complete a job, now, we're gonna divide this value in 2 to obtain the time that need two persons to complete a job:

  • Time to complete a job between 2 persons = \frac{10}{2}days
  • Time to complete a job between 2 persons = 5 days

How two persons need 5 days to complete a job (in this case, the two persons are Janice and Karen), we can make a simple rule of three to obtain the percentage made in 1 day:

  • 5 days ⇒ 100% of a job
  • 1 day ⇒ x

Then:

  • x=\frac{1*100}{5} (you can use the % if you want, the result is the same)
  • x=\frac{100}{5}
  • x=20

As you can see, <u><em>Janice and Karen just in a day could do 20% of the job</em></u>.

3 0
3 years ago
The length of AC⎯⎯⎯⎯⎯ is 10 inches.
Maru [420]

Answer:

5 in

Step-by-step explanation:

AC = the diameter

FA = the radius

diameter=2*radius

10=2*FA

FA=10/2

FA=5 in

3 0
3 years ago
Read 2 more answers
Which expression represents the perimeter of the rectangle above?
Arisa [49]

Answer:

12x-8

Step-by-step explanation:

Added both equations and used PEMDAS to combine all equations

7 0
3 years ago
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