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
zepelin [54]
3 years ago
8

The students in Mr. Sanchez's class are converting distances measured in miles to kilometers. To estimate the number of kilomete

rs, Abby takes the number of miles, doubles it, then subtracts 20% of the result. Renato first divides the number of miles by 5, then multiplies the result by 8. Write an algebraic expression that shows the process that both students used. Abby's expression: Renato's expression:
Mathematics
1 answer:
BaLLatris [955]3 years ago
6 0

Step-by-step explanation:

Abby’s Expression:

Double m, giving 2m. She then takes 20% of the result, which we can write 0.2(2m). Finally she subtracts this from 2m, giving 2m−(0.2)2m

2m − (0.2)2m

Renato’s Expression:

Divide m by 5, giving m ÷ 5 = m/5, and then multiplies the result by 8, giving:

8(m/5)

You might be interested in
Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance
zzz [600]

Answer:

\frac{\Delta v}{v}=0.426

Step-by-step explanation:

you have that the average sped is given by the following formula:

v(x,t)=\frac{x}{t}

The uncertainty formula for a division is given by:

\frac{\Delta v}{v}=\sqrt{(\frac{\Delta x}{x})^2+(\frac{\Delta t}{t})^2}        (1)

Δv: uncertainty in speed

Δx: uncertainty in the distance = 0.9m

Δt: uncertainty in time = 0.7s

x: distance = 8.1m

t: time = 1.7s

You replace the values of all parameters in the equation (1):

\frac{\Delta v}{v}=\sqrt{(\frac{0.9}{8.1})^2+(\frac{0.7}{1.7})^2}\\\\\frac{\Delta v}{v}=0.426

Hence, the relation between the uncertainty in the average velocity is 0.426

4 0
3 years ago
Solve by the method of your choice, select correct choice below if it is either a solution set, infinitely many solutions the so
mafiozo [28]

Answer: it is a solution set

Step-by-step explanation:

The given system of simultaneous linear equations is expressed as

7x-3y=6 - - - - - - - - - -1

2x+y=11 - - - - - - - - - - - 2

We would eliminate x by multiplying equation 1 by 2 and equation 2 by 7. It becomes

14x - 6y = 12

14x + 7y = 77

Subtracting, it becomes

- 13y = - 65

Dividing the left hand side and the right hand side of the equation by - 13, it becomes

- 13y/13 = - 65/- 13

y = 5

Substituting x = 5 into equation 2, it becomes

2x + 5 = 11

Subtracting 5 from the left hand side and the right hand side of the equation, it becomes

2x + 5 - 5 = 11 - 5

2x = 6

Dividing the left hand side and the right hand side of the equation by 2, it becomes

x = 6/2 = 3

6 0
4 years ago
What is the solution set of x^2-10=30x
ch4aika [34]

x= 1/5

12-10=30x  subtract them

2=30x  switch the sides

30x=2  and you get x=1/5

8 0
4 years ago
Find the 15th term of the geometric sequence 7, -21, 63, ...7,−21,63,
Anastasy [175]

Answer:

not sure

Step-by-step explanation:

7 0
3 years ago
Roll a dice if the dice shows 6 tick the box marked yes.
maksim [4K]
That is a strangely worded question... but I think you're asking how many people said they got a 6 but did not.

So, a dice that has 6 sides has a 1/6 chance of Landing on a 6. so 1/6 of 360 should be that 60 people got a 6. Therefore 119-60 = 59.

The proportion is 59/360 that lied
3 0
3 years ago
Other questions:
  • Please help w/ this question <br><br> image attached
    5·1 answer
  • One fish is 4 feet below sea level. Another fish is 3 feet below sea level. write each position as an integer. Which integer is
    5·2 answers
  • What is the least common multiples of 4,5 and 6?
    9·1 answer
  • Show what you know: Finding sin, cos, and tan AC20 BC16 AB12
    13·1 answer
  • Ben played at a friends house
    14·2 answers
  • How many inches are in 14 feet, 8 inches? Enter only the number. Do not include units
    13·1 answer
  • For ​f(x)=x+2 and ​g(x)=2x+3​, find the following functions. a. (f◦g)(x)​; b. (g◦f)(x)​; c. (f◦g)(0)​; d.
    15·1 answer
  • To complete bookshelves, a? At your store needs to purchase vertical brackets to attach to the wall. The customer wants to shelv
    12·1 answer
  • Timed plz help meeee
    13·1 answer
  • the sum of two numbers is 123. when the larger number is added to 5 times the smaller, the sum is 343. find the numbers.​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!