1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LiRa [457]
3 years ago
8

Please help I dont understand ​

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0

Step-by-step explanation:

When it says y varies directly with x it just means that y and x are proportional/equal to each other. The constant of variation and the constant of proportionality are the same thing just different way of saying it so they can confuse you and make your life miserable. Since y and x are proportional to each other and the constant of proportionalty is -5 to make an equation that represents a line you use the formula y=mx+b. That is the slope of the line. With that formula let's first plus in the x so we have y=m2+b. The formula for direct variation is y=kx as well that's good to know and it's good to memorize all these formulas. Math becaomes easier when you have the process down pat and you just need to plug numbers into different equations, expressions, and scenarios. Do m = [y1 - y2] / [x1 - x2] and you'll get the answer.

You might be interested in
Least common multiple of 11,39,35,8
scoundrel [369]
Factor each out:
11: 1*11
39: 3*13
35: 5*7
8: 2*2*2
since you can see no common factor just multiply them all to get 120120
5 0
3 years ago
Read 2 more answers
A bacteria culture starts with 1000 bacteria and the number doubles every 40 minutes. (a) find a formula for the number of bacte
vfiekz [6]

The formula for the number of bacteria at time t is 1000 x (2^t).

The number of bacteria after one hour is 2828

The number of minutes for there to be 50,000 bacteria is 324 minutes.

<h3>What is the number of bacteria after 1 hour?
</h3>

The exponential function that can be used to determine the number of bacteria with the passage of time is:

initial population x (rate of increase)^t

1000 x (2^t).

Population after 1 hour : 1000 x 2^(60/40) = 2828

Time when there would be 50,000 bacteria : In(FV / PV) / r

Where:

  • FV = future bacteria population = 50,000
  • PV = present bacteria population = 1000
  • r = rate of increase = 100%

In (50,000 / 1000)

In 50 / 1  = 3.91 hours x 60 = 324 minutes

To learn more about exponential functions, please check: brainly.com/question/26331578

#SPJ1

5 0
2 years ago
The table gives the vertices of a preimage and its image under what transformation? (x, y) (?, ?)
ankoles [38]
The first one is 8 and the second one is 6
3 0
2 years ago
Sarah Worker is making a presentation. She has 81 people in a workshop. She selects 64. The average budget expense for groceries
Komok [63]
True is the answer hope i help
6 0
3 years ago
Read 2 more answers
PLEASE HEALPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP PPPPPPPPPPPP (−18)×4
zepelin [54]

Answer:

-18 x 4 = -72

Step-by-step explanation:

a negative times a positive is a negative number.

4 0
3 years ago
Other questions:
  • Jacks Car averages 31.5 miles on the highway per gallon. If his fuel tank holds 13.2 gallons and it is 3/4 full then how far can
    14·1 answer
  • Stacy and Travis are rock climbing. Stacy's rope is 4 feet shorter than 3 times the length of Travis' rope. Stacy's rope is 23 f
    7·1 answer
  • Which is the equation of a circle that has a center of (-1, 3) and passes through the point (3, 6)?
    13·2 answers
  • Could anyone help me with this? I will mark you as brainliest!
    13·2 answers
  • Determine the points for the graph of the relation y = -5x -3 using the x-values given in the table
    5·1 answer
  • A box of chocolates contains, on average, 12 pieces of chocolate. If the number of chocolates in each box never varies from the
    9·1 answer
  • 7/10 divided by -2/5
    5·2 answers
  • A) Use the method of cylindrical shells to find the volume of the solid obtained by rotating the region bounded by the given cur
    10·1 answer
  • Solve for x. x = [?] = 5x - 73x + 27 Enter​
    5·1 answer
  • 3. A 5 ft tall person casts an 8 ft shadow, and stands next to a tree that casts a 65
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!