Mathematics Middle School

A motorboat moves across a lake at a constant speed. When it begins, it is 55 km from the shore. After 12 minutes, it is 19 km from the shore. Which function describes the motorboat's distance from the shore?
A. y = –12x + 19
B. y = –3x + 55
C. y = 3x + 55
D. y = –12x + 55

Answers

Answer 1

Answer:

y= _3x+55

Step-by-step explanation:

we conqet two points
(0,55)  (12,19)

55=B                       subsiquent two points into the equation
19=a,12+55
a=-3
b=55
so we choose B

A Motorboat Moves Across A Lake At A Constant Speed. When It Begins, It Is 55 Km From The Shore. After
Answer 2

Answer:-3x=55

Step-by-step explanation:I had to do it

Related Questions

Please Help! Show your work

The Cost C (in dollars) of making n watches is represented by C=15n+85. How many watches are made when the cost is $385?

Answers

Answer:

The number of watches made is 8

Step-by-step explanation:

SO the equation is C=15n+85 where C is the total cost and N is the amount of watches

1)plug in C

385=15n+85

2)move 85 to the other side so it would become -85

385=15n+85 → 385-85=15n → 100=15n

3)divide 15 from both sides

100/15=15n/15 → 25/3=n

since the number of watches can't be a fraction, we round to the lowest number which is 8(24/3)

Give the position of A on this number line.
Write a fraction for your answer.

Answers

Answer:

4/6

Step-by-step explanation:

there is 6 dots and on the 4th dot there is a

4/6 because of the dots

Could somebody please help me find the answers for 'x' for these pictures?
**Please let me know which one you solved along with the answer**

Answers

Answer:

Pic 1: [tex]x=31[/tex]

Pic 2: [tex]x=20[/tex]

Step-by-step explanation:

Picture 1:

[tex]2x+x-3=90\\3x-3=90\\3x=93\\x=31[/tex]

First, add the 2x and x together for 3x

Then add 3 to both sides of the equation

Finally, divide each side by 3.

Picture 2:

[tex]7x+x+20=180\\8x+20=180\\8x=160\\x=20[/tex]

First, add 7x and x together for 8x

Then, minus 20 from both sides of the equation

Finally, divide each side by 8.

Step-by-step explanation:

First picture

We can make an equation with this

2x+x-3=90

3x=93

x=31 degrees

Second picture

We can make and equation

7x+x+20=180

8x=160

x= 20

I CANT HELP MY BROTHER SOLVE THIS QUESTION AND I DONT WANT HIM TO CALL ME D*UMB PLZ HELP

Answers

Answer:

yes

Step-by-step explanation:

7 weeks * 7 days per week = 49 days49 days * 2 meals per day = 98 total meals98 meals * 31 grams per meal = 3038 grams after 7 weeks

Answer: Yes, he will meet his goal of eating 3,000 grams of protein in 7 weeks.

Step-by-step explanation: So for the top part your answer is supposed to be 4400.2 grams of protein in 7 weeks. You can get that by adding up the grams of protein for each type of food on the chart. Then you multiply that by 2 to get the amount they will be eating for 1 day which is 89.8. After that, because you have to solve for how much they will be eating for 7 weeks, you will have to multiply 89.9 x 49(days in total). To get you to the answer 4400.2. Now you have your answer for the second part of the problem. Yes, he will meet his goal of eating 3,000 grams of protein in 7 weeks.

Please help! Cumulative Practice.
Question in picture

Answers

Answer:

                                                   

Step-by-step explanation:

A store is making 720 limited edition watches available for sale throughout the month. Each day, 6.25% of these watches will be made available for sale.

How many watches will have been made available for sale after 5 days?

Answers

225 watches, multiply 720 by 0.0625 to get per day, then multiply by 5 for 5 days
First fine 5% of 720 which is 36
Then find 1% of 720 which is 7
Then 0.25% of 720 which is 0.75
Now add them together to find 6.25% which is equivalent to 43.75
Now times this by 5 for the 5 days
43.75 x 5 = 218.75
Now rounded up too 219 watches for sale after 5 days

PLS help i need this done now!

Answers

Answer:

3

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

A restaurant sells burritos for $8.00 each. The cost of the meat is $1.50 and the cost of the other ingredients is $1.00 for each burrito.

Money made from selling burritos is positive. The cost of making burritos is negative. Profit is the money left after paying the costs.

How much profit would the restaurant make by selling 100 burritos?

1. How much money would the restaurant take in by selling 100 burritos?

2. What is the cost of making one burrito? (remember that costs are negative)

3. What is the cost of making 100 burritos?

4 What is the profit the restaurant makes from selling 100 burritos? Does the restaurant make money or lose money?

Answers

First let's find the cost to make the burritos.

$1.50 + $1.00 = $2.50 needed to make one burrito.

1. To find how much money the restaurant takes in from selling 100 burritos, we can do 100*8.00 which is $800.

2. We have already found the cost of making a burrito, which is $2.50

It says to convert the cost to a negative so I guess it would be -2.50?

3. The cost of making 100 burritos can be found by doing 100*2.50 which is equal to $250. The cost of making 100 burritos is $250.

4. To find the profit, we can subtract the answers from question 1 and question 3. 800-250 would be a profit of $550. The restaurant is gaining money. The price to make the burritos is way less than the money made from selling the burritos.

1. 550 becuase they make a 8 dollar profit, but then they lose 2.5 because to make the burito, they need to buy 1.5 dollars of meat and 1 dollar of ingredient. you get 8-2.5=5.5
then 5.5 times 100 because 5.5 is the amount gain after one burito. you want to find 100 so 5.5 times 100=550
2.-2.5
3.-2.5 times 100=-250
4. resturant makes money, they earn an 550 as said in the first question

Look at the PDF and help plz all do all questions AND SHOW THE WORK PLZ OR IT WILL FAIL. use the standard algorithm to show it

Answers

Just listen biiiiendnenendndndndjdjdjdjdj

Mr. Reynolds is a rancher. He started with a 150 cows in his herd. Due to a hole in his fence, he now has 120 cows in his herd. By what percentage was the number of cows in Mr. Reynold's herd reduced?

Answers

Answer:

20%

Step-by-step explanation:

Therefore, the percentage of the number of cows in Mr. Reynold's herd reduced is [tex]20[/tex] %.

What is the percentage?

A percentage is a number or ratio expressed as a fraction of [tex]100[/tex]. It is often denoted using the percent sign, "%".

Here given that,

Mr. Reynolds is a rancher. He started with a [tex]150[/tex] cows in his herd. Due to a hole in his fence, he now has [tex]120[/tex] cows in his herd.

Number of cows Mr. Reynolds have

[tex]\frac{120}{150}[/tex] ×[tex]100=80[/tex] %

So, the number of cows Mr. Reynolds reduced is

[tex]100[/tex] % - [tex]80[/tex] % = [tex]20[/tex] %

Hence, the percentage of the number of cows in Mr. Reynold's herd reduced is [tex]20[/tex] %.

To know more about the percentage

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I need help please!!!
I need the answer take your time to answer it please!

Answers

Answer:

it is one of the top 2 cant figure out wich one though, sorry :(

Step-by-step explanation:

It’s the second one I got 100 percent when I chose it

Give the position of A on this number line.
Write a fraction for your answer.

Answers

Answer:

1/5

Step-by-step explanation:

0.25 also referred to as 1/4

3/4
3/8=
?/?÷3/8=
/ × /
=
servings

Answers

Answer:

9/32

Step-by-step explanation:

Pretend that 3/4 is z and 3/8 is y and x is the solution

x/y=z is same as z*y=x 3/4*3/8=9/32

9/32
I had the same question

Select all the equations that can represent the question: "How many groups of 45 are in 1?"

1. ?·1=45

2. ?·45=1

3. 45÷1=?

4. 1÷45=?

5. 1·45=?

Answers

Answer:

number 3 (45)

number 5(45)

number 1 (45)

#1-45
#2- 1
#3 45
#4-0.2
#5-45

ILL GIVE BRAINEIST TO WHOEVER ANSWERS

Answers

Answer:

Im not sure but i would go with my guts if i were you:)

Step-by-step explanation:

Answer: The answer is A) (0, 3.5). I hope my answer is very helpful to your own question about the graph of the linear equation that passes through the given point, please mark me as brainliest, and have a great rest of the day! :D

Sincerely,

Jason Ta,

The Ambitious of The Brainly And The Role of The TDSB And WHCI Student of The High School.

Step-by-step explanation:

Given F(x) =3x+2 and g(x) = 2x2 , find the following composite functions:
a. (g*f)(3)
b. (f*g)(x)

Answers

Answer:

b. (f*g)(x)

Step-by-step explanation:

Set up the composite result function.

g ( f ( x ) )

Evaluate  

g (f ( x ) )

by substituting in the value of  

f  into  g . g ( 2 x 2 + 3 ) =3 ( 2 x 2 + 3 ) − 2

Simplify each term.  

g ( 2 x 2 + 3 ) = 6 x 2 +9 − 2

Subtract  

2  from  9 . g ( 2 x 2 + 3 ) = 6 x2+ 7

Answer: B

Step-by-step explanation:

Set up the composite result function.

g ( f ( x ) )

Evaluate  

g (f ( x ) )

by substituting in the value of  

f  into  g . g ( 2 x 2 + 3 ) =3 ( 2 x 2 + 3 ) − 2

Simplify each term.  

g ( 2 x 2 + 3 ) = 6 x 2 +9 − 2

Subtract  

2  from  9 . g ( 2 x 2 + 3 ) = 6 x2+ 7

Please help. Explain.

Answers

Answer:

50

Step-by-step explanation:

From the pattern, you can see that to get y from x, you have to multiply 5.

For example:

[tex]1*5=5[/tex]

[tex]4*5=20[/tex]

[tex]6*5=30[/tex]

Thus,

[tex]10*5=50[/tex]

Answer:

60

Step-by-step explanation:

Sorry if it was wrong ight so what i did was 6 divied by 10 and got 0.6 i know u can't put 0.6 so i multiplied 6 by 10 and got 60

Please explain I am very confused!

Answers

Answer:

42°

Step-by-step explanation:

Altitude of an isosceles triangle divides it vertex in equal angles

so ∠ABD = ∠PBC = 48/2 = 24

In ΔABC sum of angles = 180 and ∠A = ∠C

48 + A + C = 180

2A = 180 - 48 = 132

A = 132/2 = 66 = ∠C

As PB = PC  ---> ∠PBC = ∠PCB = 24

∠ACB = 66 = ∠PCD + ∠PCB

66 = ∠PCD + 24

∠PCD = 42

Geometry is kinda hard but use the homework app that your on and it will give the best answer

help me out lord, help me fooks !

Answers

Step-by-step explanation:

V=Bh

V=πr²h

=π(9in)² (4in)

=π(81²) (4)

=81 x 4 = 324 π³

= 324(3.14)in³

multiply 324 x 3.14

= 1017.36 in³

9 | 20 + d and 20 ≤ 20 + d ≤ 29
1. What does the line mean?
2. What is the meaning of "|" in this equation and also in algeria? Please explain.

Answers

the line means like equal to so it’s like 20 is greater than or equal to 20
The line means absolute value of one number.

p = 2l+2w

show your work; solve for w.

subject: math, literal equations

Answers

P=2l+2w first step is to subtract the 2l on both sides to get p-2l=2w. Now divide by 2 on both sides to get p/2-l=w
(p/2)-L = w
Hope the photo helps

help if you know pls and thanks

Answers

5/14 is the answer
Good luck on the test lol-

Calculate the difference between 1/5 and 5/8
A: 1
B: -17/40
C: 1 1/3
D: -17/30

Answers

Answer:

The difference between means we are subtracting. 1/5 - 5/8 = -0.425 = -17/40

Solution:

Since 5/8 is greater than 1/5, it is a negative fraction.

Hope this helps!

Answer:

B. -17/40

Step-by-step explanation:

don't add links please

Answers

Answer:

A

Step-by-step explanation: I think

a
explanation: got it write lol

Which rate is not equivalent to 180 feet per 8 seconds?

Answers

Answer:

Answer is D

Step-by-step explanation:

180/8 = 22.5

All the answers equal 22.5 except for 180/1

180/8 also cannot be equal to 180/1

Answer:

D. 180ft/1 sec

Step-by-step explanation:

Hope this helps!

Please help me i need help..

Answers

I can’t see the question

ill give brain if u give me brain 2

Answers

Answer: 1 brain

Step-by-step explanation:

If one person has a brain, the number of brains they have, x, is 1.

Then, upon giving a brain to another person, x decreases by 1, becoming 0.

Then, when given a brain, x increases by 1, settling at 0.

Hope it helps :)

[tex]_{lol}[/tex]

Answer:

Meaning don't get you please

4 x 9.4
Pls SOLVE and EXPLAIN how you got this
Pls answer Quickly

Answers

Answer:

4 x 9.4 = 37.6

Work is in PDF file. Try your best to read.

Step-by-step explanation:

Hoped this helped.

fy the sequences of transformations based on whether or not they prove the congruency of the shapes by mapping shape I ont a reflection across the y-axis, followed by a 90° clockwise rotation about the origin, and then a translation left 18 units a 90° clockwise rotation about the origin and then a translation left 18 units a 90° counterclockwise rotation about the origin, followed by a reflection across the y-axis, and then a translation left 18 units a 90° clockwise rotation about the origin, followed by a reflection across the y-axis, and then a translation right 2 units a 180° rotation about the origin, followed by a reflection across the y-axis, and then a 90° clockwise rotation about the origin a reflection across the y-axis, followed by a 90° counterclockwise rotation about the origin, and then a translation right 2 units Maps Shape I onto Shape II Does not Map Shape l onto Shape II​

Answers

Answer:

Step-by-step explanation:

10, 8

-8, -8

Transformation is a method required to resize or change the orientation of a given shape or figure. The required answer is:

i. Statements b and d would map Shape l onto Shape II​ii. Statements a, c, e, and f does not map Shape l onto Shape II​

Transformation is a method required to resize or change the orientation of a given shape or figure. The types of transformation are translation, reflection, rotation, and dilation.Translation is a method that requires moving every point in a given shape in the same direction and same unit.

Reflection is a method that involves flipping a given figure about a given reference point or line. Rotation is a method that required turning a given figure at an angle about a reference point. Dilation is a method in which the length of the sides of the figure is either increased or decreased.Thus the answers to the question are listed as follows:

a. a reflection across the y-axis, followed by a 90° clockwise rotation about the origin, and then a translation left 18 units. Does not Map Shape l onto Shape II​b. a 90° clockwise rotation about the origin and then a translation left 18 units Answer: Maps Shape l onto Shape II​c. a 90° counterclockwise rotation about the origin, followed by a reflection across the y-axis, and then a translation left 18 units d. Does not Map Shape l onto Shape II​d. a 90° clockwise rotation about the origin, followed by a reflection across the y-axis, and then a translation right 2 units Answer: Maps Shape l onto Shape II​e. a 180° rotation about the origin, followed by a reflection across the y-axis, and then a 90° clockwise rotation about the originAnswer: Does not Map Shape l onto Shape II​f. a reflection across the y-axis, followed by a 90° counterclockwise rotation about the origin, and then a translation right 2 units. Does not Map Shape l onto Shape II​.

For more clarifications on the reflection of a figure, visit: https://brainly.com/question/20840412

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During a sale, cameras were discounted 30% from their original price of $295.99. To the nearest cent, how much was the camera during the sale to the nearest cent?

Answers

207.19 simple math.
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