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
Elena-2011 [213]
2 years ago
12

A store is having a sale on jelly beans and trail mix. For 8 pounds of jelly beans and 3 pounds of trail mix, the total is $18.

For 2 pounds of jelly beans and 5 pounds of trail mix, the total cost is $13. Find the cost for each pound of jelly beans and each pound of trail mix.
Mathematics
1 answer:
topjm [15]2 years ago
6 0

Answer: each pound of jelly beans costs 1.5 dollars, or $1.50, and each pound of trail mix costs 2 dollars, or $2

Step-by-step explanation:

j = jellybeans

t = trail mix

2j + 5t = 13

8j + 3t = 18

To solve this, we want to isolate a variable, and solve for the other. Let's do that with each equation.

2j + 5t = 13

2j = 13 - 5t

j = (13 - 5t) / 2

8j + 3t = 18

8j = 18 - 3t

j = (18 - 3t) / 8

Now that we have isolated the variable j in each equation, we can set the two right-sides equal to each other, and solve for t.

(13 - 5t) / 2 = (18 - 3t) / 8

By multiplying both sides by 8, this becomes simpler to look at.

8 * (13 - 5t) / 2 = 18 - 3t

4 * (13 - 5t) = 18 - 3t

4 * 13 - 4 * 5t = 18 - 3t

52 - 20t = 18 - 3t

52 = 18 + 17t

34 = 17t

34 / 17 = t

t = 2

Now that we have solved for t, we can trivially plug it into one of the other equations to solve for j. Let's choose the first equation, as it doesn't matter which we choose.

t = 2

2j + 5t = 13

2j + 5 * 2 = 13

2j + 10 = 13

2j = 13 - 10

2j = 3

j = 1.5

So, each pound of jelly beans costs 1.5 dollars, or $1.50, and each pound of trail mix costs 2 dollars, or $2.

You might be interested in
What is the surface area?<br> 10 ft<br> 8 ft<br> 10 ft<br> 12 ft<br> 10 ft
amid [387]

Answer:

12×8/2=48

10×10=100

2(48)+3(100)

96+300= 396ft²

5 0
2 years ago
What is the total area of the figure below?
Gnesinka [82]

Answer:

141 square inches

Step-by-step explanation:

Area of a triangle: Base*Height*1/2

Area of a trapezoid: Height * (Base1 +Base2) / 2

Triangle Base = 6

Triangle Height = 8

6*8*1/2 = 24 square inches

Trapezoid Height = 9

Trapezoid Base1 = 16

Trapezoid Base2 = 10

9*(16+10) / 2 = 117 square inches

Total = Area of triangle + Area of trapezoid

Total = 24 + 117 = 141 square inches

3 0
2 years ago
10. A 266-hp output is required for an engine. If there is a 5% loss of power, what amount of input
marta [7]

Answer:

Amount of input horsepower needed is 279.3 hp.

Step-by-step explanation:

if there is a loss of power of 5% the base horsepower will need to be increased by same percentage so that same amount of power can be delivered.

Now to calculate 5% of 266 hp, we can write

266 ×\frac{5}{100} = 13.3 hp

Now to deliver same amount of power we will have to add 5% of 266 hp to its actual power.

So real base power which is needed to deliver 266hp output even at a loss of 5% will be = (266+13.3) hp = 279.3 hp

To know more about horsepower and percentage problem:

brainly.com/question/24585630

7 0
2 years ago
You spend 2 hours and 15 minutes commuting to work each day. You work five days per week. How much time do you spend commuting t
Sonbull [250]

1075 minutes commuting to work every day.

8 0
2 years ago
Joan’s washing machine tub is a cylinder with a height of 17 in. and a diameter of 22 in. Her washer was half full of water when
xxMikexx [17]
Find the volume of the cylinder and divide by 2:

V = pi * r^2 * h

V = 3.14 * 11^2 * 17

V = 6458.98

Divide by 2 since it's half full:

6458.98 / 2 = 3229.49

Now divide it by 46.2 to see how long it will take to drain out:

3229.49 / 46.2 = 69.902

So it will take approximately 70 seconds to drain out.
4 0
3 years ago
Other questions:
  • PLEASE HELP!!! <br>What is the distance, in units, between P=(−6,8) and Q=(9,8)?
    12·1 answer
  • On an easy test, the mean score was 96 out of a possible 100 points. The distribution of the test scores is likely to beA) diago
    8·1 answer
  • Plz help Arithmetic Sequence
    15·1 answer
  • Sloane kicked a soccer ball at a speed of 36 feet per second. If the ball never leaves the ground, then it can be represented by
    13·1 answer
  • Write 25-1/11 in surd form
    11·1 answer
  • Which set of ordered pairs represents a function?
    13·1 answer
  • Drinks and snacks can be bought in a cinema.
    10·1 answer
  • Find the following for the function f(x) = x/x^2+1
    13·1 answer
  • PLEASE HELP GEOMETRY EXPLAIN PLEASE<br> I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!
    5·1 answer
  • Y+5=2(x+1) find x and y intercepts
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!