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
Dovator [93]
3 years ago
10

Please help I am horrible at math! Ye is riding home from a friend's house. After 5 minutes he is 4 miles from home, after 15 mi

nutes Ye is 2 miles from home. Which equation models his distance from home y, in terms of minutes, x?
A)y=−0.2x+ 5
B)y=11/7x-27/7
C)y = 11 7 x − 27 7
D) y= 5x− 0.2 y=0.2x
Mathematics
2 answers:
vesna_86 [32]3 years ago
6 0

Answer:

<em>y=-0.2x+5. Correct choice: A)</em>

Step-by-step explanation:

<u>Modeling With Equations</u>

Let's call x the number of minutes and y the distance from home. The correct model should meet both conditions:

After 5 minutes, Ye is 4 miles from home. This is the ordered pair (5,4)

After 15 minutes, Ye is 2 miles from home. This is the ordered pair (15,2)

A) y=-0.2x+5. Testing the first point (5,4): y=-0.2*5+5=4. Correct

Testing the second point (15,2): y=-0.2*15+5=2. Correct

This is the correct choice.

B) y=11/7x-27/7. Testing the first point: (5,4) y=11/7*5-27/7=4. Correct

Testing the second point (15,2). y=11/7*15-27/7=138/7. Incorrect

Incorrect choice.

C) This equation is equal to the choice B), thus this one is incorrect.

D) y=5x-0.2. The first point (5,4) yields to:

4=5*5-0.2=24.8 Incorrect.

klio [65]3 years ago
3 0

Answer:

The answer is B

Step-by-step explanation:

I just did the test.

You might be interested in
The answer to this question
vfiekz [6]

Answer: Easy 17 25/48




8 0
3 years ago
Read 2 more answers
A square can be. Rhombus, and figure X is a rhombus, so figure X must be a square. True or false
kvasek [131]
I have to go with True because a Rhombus is a Square. 
3 0
3 years ago
Read 2 more answers
Use Cramer’s Rule to solve system of equation.
alisha [4.7K]

\left\{\begin{array}{ccc}5x+2y=4\\3x+4y+2z=6\\7x+3y+4z=29\end{array}\right\\\\A=\left[\begin{array}{ccc}5&2&0\\3&4&2\\7&3&4\end{array}\right]\\\\\det A=5\cdot4\cdot4+3\cdot3\cdot0+2\cdot2\cdot7-7\cdot4\cdot0-3\cdot2\cdot5-3\cdot2\cdot4=54\\W_x=\left[\begin{array}{ccc}4&2&0\\6&4&2\\29&3&4\end{array}\right]\\\det W_x=4\cdot4\cdot4+2\cdot2\cdot29+6\cdot3\cdot0-29\cdot4\cdot0-3\cdot2\cdot4-6\cdot2\cdot4=108

W_y=\left[\begin{array}{ccc}5&4&0\\3&6&2\\7&29&4\end{array}\right]\\\det W_y=5\cdot6\cdot4+3\cdot29\cdot0+4\cdot2\cdot7-7\cdot6\cdot0-29\cdot2\cdot5-3\cdot4\cdot4=-162\\W_z=\left[\begin{array}{ccc}5&2&4\\3&4&6\\7&3&29\end{array}\right]\\\det W_z=5\cdot4\cdot29+3\cdot3\cdot4+6\cdot2\cdot7-7\cdot4\cdot4-3\cdot6\cdot5-3\cdot2\cdot29=324\\\\x=\dfrac{\det W_x}{\det A}=\dfrac{108}{54}=2\\\\y=\dfrac{\det W_y}{\det A}=\dfrac{-62}{54}=-3\\\\z=\dfrac{\det W_z}{\det A}=\dfrac{324}{54}=6

5 0
3 years ago
Wich expression can be used to find the slope of a line containing the points (-3,2) and (7,-1)
docker41 [41]
A(x_1;\ y_1);\ B(x_2;\ y_2)\\\\\text{The slope:}\ m=\dfrac{y_2-y_1}{x_2-x_1}


\text{We have:}\\(-3;\ 2)\to\ x_1=-3;\ y_1=2\\(7;\ -1)\to x_2=7;\ y_2=-1

\text{substitute}\\\\m=\dfrac{-1-2}{7-(-3)}=\dfrac{-3}{10}=-\dfrac{3}{10}
6 0
3 years ago
The sum of three consecutive integers is 39. What is the least integer?
SOVA2 [1]

12 + 13 + 14 = 39

So least integer = 12

5 0
3 years ago
Read 2 more answers
Other questions:
  • The length of one leg of a right triangle is 11 and the length of the hypotenuse is 29. Find the length of the missing leg to th
    12·1 answer
  • The perimeter of a rectangle is 68 cm. The length is 4 cm more than its
    6·2 answers
  • A college student borrows $1500 for 9 months to pay for a semester of school . if the interest is $92.81 find the monthly paymen
    12·1 answer
  • How many lines of reflective symmetry and how many centers of rotational symmetry does the parallelogram depicted below have?
    7·1 answer
  • What is the value of Z
    8·1 answer
  • ASAP<br> what is the GCF between 20, 24, and 32?
    7·2 answers
  • Please help with this math
    8·1 answer
  • HELP PLZZZ<br> im in confusion
    5·2 answers
  • Thomas has 3 boxes, each with 8 balls.
    15·2 answers
  • Given: 9x &gt; -36. Choose the solution set. {x | x &lt; -4} {x | x &lt; 4} {x | x &gt; 4} {x | x &gt; -4}
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!