Lauren is saving money for a new tablet. The tablet costs $80. She has $17 so gar. What percent of her goal has she saved so far?

Answers

Answer 1

Answer: You have to set up a proportion:
17/80 = x/100
17 x 100 = 1700
1700/80 = 21.25
21.25%

Answer 2

Answer: If Lauren has to get $80 and only has $17 she has 17/80. 17 divided by 80 is 0.2125. To convert decimals to percents, you move the decimal over to the right 2 times. Your answer is 21.25

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Please help with mathematics

Dave drives 15 miles to work the journey takes 20 minutes what is Dave's average speed in miles per hour?

Answers

The correct answer is 75 miles per hour. Set it up as a proportion.

what is the constant of proportionality (in miles per hour) based on the table? (can you please help me)

Answers

Answer:

45 ( please label me brainliest)

Step-by-step explanation:

Final answer:

The constant of proportionality is a factor that describes a linear relationship between two variables. In the context of a car's speed, it can be found by dividing the distance covered by the time taken, giving a result in miles per hour.

Explanation:

The constant of proportionality is a factor used to describe quantities that have a linear relationship. It is the ratio between two directly proportional variables. For example, if the speed of a car increases proportionally with the time spent driving, the constant of proportionality would be the rate the car is moving in miles per hour (mph). It can be found in simple linear equations with the form y = mx + b, where m is the constant of proportionality.

In your case, if you are given a table of values displaying a linear relationship, the constant of mathrm{proportionality} in mph can be found by selecting any two corresponding values (for time and distance in this case), and calculating the rate by dividing the distance covered in miles by the time taken in hours.

This rate (in miles per hour) is your proportionality constant, assuming that the relationship is indeed linear. Therefore, if one assumes the speed remains constant and acceleration is nil, then the speed of the car (in mph) is the constant of proportionality in this context.

Learn more about the Constant of Proportionality here:

brainly.com/question/29153656

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A bag contains 3 red marbles, 5 yellow marbles, and 4 blue marbles. One marble is chosen at random. What is the probability that the chosen marble will be blue?A. 1/12

B. 1/4

C. 1/3

D. 3/4

Help fassst ! <3

Answers

Hey! So I know you know the answer but I felt you should know how to work it... First add all the marbles together (4+3+5=12). Then put the color you want over the total amount (in this case it would be 4: 4/12). Then simplify: 4/12=1/3 :) I hope this helps

All you have to do is add all marbles up and there is 12 marbles all together and 4 blue marbles that would be 4/12 reduced would be 1/3

half of Robert's piece of wire is equal to 2 thirds of Maria's wire. The total lenght of their wire is 10 feet. How much longer is Robert's wire than Maria's?

Answers

You have a system of equations here. R=Robert's piece of wire M=Maria's piece of wire

R/2=2M/3
and
R+M=10

With some basic algebra, you can make that first equation into
R=4M/3
then use substitution to get
(4M/3)+M=10
Then solve for M
(4M/3)+(3M/3)=10
7M/3=10
7M=30
M=30/7

so Maria's wire is 30/7 feet long. With a little more substitution, we can get:
R+(30/7)=10
R=10-(30/7)
R=(70/7)-(30/7)
R=40/7 feet long

So your final answer would be that Robert's wire is 10/7 feet longer than Maria's (which you could always put into decimal form)

Robert's wire is $1(3)/(7)$ longer than Maria's wire

Further Explanation

Let's say

Robert's wire = x

Maria's wire = y

From the problem given we know that:

$\boxed {(1)/(2) x = (2)/(3)y }\n \boxed {x + y = 10 }$

$\boxed {x = 10-y }$

So we get two equations:

$\boxed {(1)/(2) x = (2)/(3)y }\n\boxed {(1)/(2) (10-y) = (2)/(3)y } \n\boxed {5 - (1)/(2)y = (2)/(3) y }\n\boxed {5 = (2)/(3)y + (1)/(2)y }\n\boxed {5 = (7)/(6) y }\n\boxed { y= (30)/(7) }$