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
Yuki888 [10]
2 years ago
8

Please Help I Don't Understand!!!

Mathematics
2 answers:
Llana [10]2 years ago
7 0

Answer:

14.5

Step-by-step explanation:

\frac{2}{7}  =  \frac{5}{m + 3}

2(m + 3) = 7 \times 5

2m + 6 = 35

2m = 35 - 6

2m = 29

m = 14.5

Wittaler [7]2 years ago
7 0

Answer:

m = 14.5

Step-by-step explanation:

\frac{2}{7} = \frac{5}{m+3} ( cross- multiply )

2(m + 3) = 35

2m + 6 = 35 ( subtract 6 from both sides )

2m = 29 ( divide both sides by 2 )

m = 14.5

You might be interested in
What is the sum of 2/11, 7/11, and 1/11
Nookie1986 [14]

Answer:

10/11

Step-by-step explanation:

The fractions already have like denominators so you just add the numerators as there is no need to find the LCM but just in case

5 0
3 years ago
What shape has 3 straight sides other than a triangle?
iogann1982 [59]
None that is a real shape
6 0
3 years ago
Read 2 more answers
What is the scale factor of 24 and 18<br><br> 1/6<br> 2/3<br> 1/4<br> 3/4
Soloha48 [4]

Answer:

The answer is 3/4

Step-by-step explanation:

look up scale factor calculator

4 0
2 years ago
The units digit of a two digit number is 1 less than 3 times the tens digit. if the digits are reversed, the new number is 45 mo
alex41 [277]
The units digit of a two digit number is 1 less than 3 times the tens digit. if the digits are reversed, the new number is 45 more than the original number. find the number

5 0
3 years ago
Answer as many as possible please need work for brainilist
zysi [14]

Answer:

1. 18x + 35y = 598

  x + y = 20

  Isolate a variable in the second equation:

  y = -x + 20

  Plug y back into the first equation

  18x + 35(-x + 20) = 598

  18x - 35x + 700 = 598

  -17x +700 = 598

  -17x = -102

   x = 6

   <u>You carpool 6 days of the 20</u>

   6 + y = 20

   y = 14

   <u>You ride the bus 14 days of the 20</u>

2.   4.50n + 3p = 252

     p = 2n

     Substitute p into the first equation

     4.50n + 3(2n) = 252

     4.50n + 6n = 252

      10.5n = 252

      n = 24

      <u>They sold 24 cans of nuts</u>

      p = 2(24)

      p = 48

      <u>They sold 48 boxes of popcorn</u>

      <u>The group sold, in total, 24 + 48 = 72 cans of nuts and boxes of popcorn. </u>

3.  x - y = 3

    x + y = 8

    Isolate a variable

    x = y + 3

    (y + 3) + y = 8

    2y + 3 = 8

    2y = 5

    y = 2.5

    <u>The average speed with wind is 2.5 mph</u>

    x - 2.5 = 3

    x = 5.5

    <u>The average speed without wind is 5.5mph </u>

4. x + 8y = 22.8

   x + 6y = 18.6

   Isolate

   x = -8y + 22.8

   Substitute

   (-8y + 22.8) + 6y = 18.6

   -2y + 22.8 = 18.6

   -2y = -4.2

   y = -2.1

   <u>The gas costs $2.10 per gallon</u>

    x + 8(2.1) = 22.8

    x + 16.8 = 22.8

    x = 6

    <u>The cost of the car was is $6. </u>

5.  Cost = 9.99 + 2.49x

    Cost = 20.49 + 1.79x    

    To find which one is better, we need to set them equal to each other at first.

    9.99 + 2.49x = 20.49 + 1.79x

    9.99 + 0.70x = 20.49

    0.70x = 10.5

    x = 15

So, they cost the same at 15 rentals.

To find which one is the better deal let's see how much both cost after 16 rentals.

     Cost = 9.99 + 2.49(16)

              = 49.83

     Cost = 20.49 + 1.79(16)

              = 49.13

<u>Therefore, Main Street is the better deal because after the equilibrium Main Street costs less than Big Video. </u>

6.  x + y = 15

    .25x + .05y = 2.75

    Isolate

    x = -y + 15

    Solve

    .25(-y + 15) + .05y = 2.75

    -.25y + 3.75 + .05y = 2.75

    -0.2y + 3.75 = 2.75

    -0.2y = -1

    y = 5

    <u>There are 5 nickels</u>

     x + 5 = 15

     x = 10

     <u>There are 10 quarters</u>

7. x + y = 26

   x + .25y = 17

   Isolate

   x = -y + 26

   Substitute

   (-y + 26) + .25y = 17

   -0.75y + 26 = 17

   -0.75y = -9

   y = 12

   <u>There are 12 quarters in his pocket</u>

   x + 12 = 26

   x = 14

   <u>There are 14 dollars </u>

<em>I hope this helps!!</em>

<em>- Kay :)</em>

6 0
3 years ago
Other questions:
  • Solve the equation 1/4 (x+2)+5=-x
    15·2 answers
  • You have researched your dream around-the-world vacation and determined that the total cost of the vacation will be $39,000. You
    5·1 answer
  • A white water rafting company sells tickets for an 18-mile river tri How much does it cost to travel one mile? Round your answer
    14·1 answer
  • In a division problem, the _ _ _ _ _ _ _ is the number that "goes into" the dividend.
    9·2 answers
  • How do find Herons formula?
    13·1 answer
  • Will mark brainliest
    13·2 answers
  • Give an example of a rigid object
    13·2 answers
  • PLZ HELP FAST <br><br> If you spend $3 on 6b apples, what is the unit rate (in dollars) per apple?
    14·2 answers
  • O
    15·2 answers
  • Kimberly is planning to drive 2916 miles on a road trip. if she wants to complete the trip in 6 days, how many miles will she ne
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!