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

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

The value of a professional basketball player's autograph rose 40% in the last year. It is now worth $294.00. What was it worth a year ago

Answers

Answer:$210

Step-by-step explanation: First you have the original worth which is equal to 100% and an additional $40%. Next you divide the current worth by 140% which can be written as 1.4. The result is $210 as the worth a year ago.

Using subsitution, which value of x makes this equation true?

Answers

Answer:

x = 3/5

Step-by-step explanation:

After substituting each option into the equation, we find that the only option that makes the equation true is x=3/5, since 4/5 - 3/5 = 1/5.

3/5, simple subtraction and substition .

Honestly dunno what 2 do

Answers

Step-by-step explanation:

For number one, you are looking for how many multiplication equations can equal the number given. For example,

C) 12: 1, 12, 6, 2, 3, 4,

For number 2, composite numbers are numbers that are products of two smaller numbers.

For example, 30=15x2, so it is composite. Try dividing the numbers to see if they are composite.

For number 3,

a) two factors: 5 (1, 5)

b) four factors: 15 (1, 15, 3, 5)

c) five factors: 20 (1, 2, 4, 5, 20)

Answer:

Step-by-step explanation:

b) 8: 1, 2, 4, 8

c) 12: 1, 2, 3, 4, 6, 12

d) 16: 1, 2, 4, 8, 16

e) 9: 1, 3, 9

f) 18: 1, 2, 3, 6, 9, 18

g) 50: 1, 2, 5, 10, 25, 50

h) 45: 1, 3, 5, 9, 15, 45

i) 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

j) 42: 1, 2, 3, 6, 7, 14, 21, 42

2a) 30: is a composite number

  b) 31: not composite

  c) 32: is a composite number

  d) 33: is a composite number

  e) 34: is a composite number

  f) 35: is a composite number

  g) 36: is a composite number

  h) 37: not composite

NOTE: a composite number has more than two factors

3a) two factors: 11

 b) four factors: 6

 c) five factors: 16

1/4 times the sum of a number and −3.2 is 1.8

What is the number?

Enter your answer as a simplified mixed number.

Answers

Replace the unknown number as x. You know that (x-3.2)1/4=1.8. Multiply (x-3.2)1/4 by four to cancel out the 1/4 and do the same with 1.8 on the other side. This will leave you with x-3.2=7.2. Add +3.2 to both sides of the equation to cancel out the -3.2 and it leaves you with x=10.4. Your answer is 10.4

The mixed number for the  given case can be obtained as 10²/₅.

How to write a linear equation?

A linear equation for the given case can be written by assuming any variable as the unknown quantity. Then, as per the given data the required operations are done and it is equated to some value.

Suppose the number be x.

Then, the following equation can be written for information given as,

1/4(x - 3.2) = 1.8

It can be solved as,

x - 3.2 = 1.8 × 4

⇒ x = 7.2 + 3.2 = 10.4

It can be written in mixed form as below,

10.4 = 10 + 4/10

⇒ 10 + 2/5 = 10²/₅

Hence, the required number is 10²/₅.

To know more about linear equation click on,

https://brainly.com/question/11897796

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Which equation has a solution of t = 1/4

Answers

Answer:

2t = 1 / 2

Step-by-step explanation:

2t = 1 / 2

t = 1 / ( 2 x 2 )

t = 1 / 4

Answer:

C. 2t = 1/2

Step-by-step explanation:

A. 2 1/4 + (1/4) = 4

9/4 + 1/4 = 4

10/4 = 4

2 1/2 = 4 X

B. 4(1/4) = 16

1 = 16 X

C. 2(1/4) = 1/2

1/2 = 1/2

D. (1/4) - 1 = 3/4

-3/4 = 3/4 X

Help! I will give brainliest if correct

Answers

Answer:

the awnswr i believe is B, because a funcion has diffrent x's

Answer:

No, its not.

Step-by-step explanation:

I need help I am struggling with this!

Answers

Answer:

I THINK (so so so so so so so so sorry If you get wrong :( )  C. (8, 5)

Step-by-step explanation:

Since it is a linear equation I assumed the formula y2 - y1/ x2 - x1 would equal the solution

SORRY! if it is wrong

I really do apologize/

Answer:

I am pretty sure that it is c. (8,5)

Step-by-step explanation:

pls pls pls help help pls

Answers

Answer:

b or 7/9

Step-by-step explanation:

Answer:

The correct answer is B: 7/9

Help me please! correct answer gets brainliest!!

Answers

Answer:

T = 7

Step-by-step explanation:

Again, I could use some help on these as well, and i might be sending another question as well

Answers

#9 is 11.96 but rounded to the nearest tenth it’s 12

Answer:

B?

Step-by-step explanation:

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