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Ann [662]
3 years ago
9

138) Amanda and Jenny are selling fruit for a school fundraiser. Customers can buy small boxes of oranges and large boxes of ora

nges. Amanda sold 5 small boxes of oranges and 5 large boxes of oranges for total of $155. Jenny sold 10 small boxes of oranges and 12 large boxes of oranges for a total of $ 346. Find the cost each of one small box of oranges and one large box of oranges?.
Mathematics
1 answer:
Alex17521 [72]3 years ago
6 0
This is a system of equations problem, so we need two equations to represent each case:
5s+5L=155
10s+12L=346

Now we isolate one of the variables.

5s = 155 - 5L
s = 31 - L

Now we substitute s in the other equation with this equation.

10(31-L) + 12L = 346
310-10L + 12L = 346
2L = 36
L = $18

Now to find s we need to plug L into one of the equations.

10s + 12(18) = 346
10s + 216 = 346
10s = 130
s = $13

A large box costs$18 and a small box costs $13

Hope this helps.
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The Davis family is going to reseed the grass in the backyard. Their yard is irregularly shaped with a cement patio and rectangu
prohojiy [21]

Answer:

1,482 square feet

Step-by-step explanation:

Find total area - 37 x 46 = 1,702

Find area of patio and garden - 16 x 10 = 160 for the patio, 12 x 5 = 60 for the garden

Subtract from total area - 1702 - 160 = 1542, 1542 - 60 = 1,482 sq ft

5 0
3 years ago
Discrete or Continuous? Identify the random variables in Exercises 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 as either discrete or cont
lions [1.4K]

Answer:

Discrete variable        

Step-by-step explanation:

We are given the following in the question:

Variable:

Total number of points scored in a football game

Discrete and continuous data:

  • Discrete data is the data that can be expressed in whole numbers. They cannot take all the values within an interval.
  • Discrete variables are usually counted and not measured.
  • Continuous variable can be expressed in fractions and can take any value within an interval.
  • Continuous variable are usually measured and not counted.

Since, total number of points score in a foot game are expressed in whole numbers and cannot be expressed in decimals, they are discrete variable. They cannot take all the values within an interval and they are usually counted.

Thus,

Total number of points scored in a football game is a discrete variable.

8 0
3 years ago
Find the vector that has the same direction as 3, 2, −6 but has length 2.
Nata [24]

Answer:

The vector is \vec r = \left(\frac{6}{7},\frac{4}{7},-\frac{12}{7}\right).

Step-by-step explanation:

We can determine the equivalent vector (\vec r), dimensionless, by means of the following formula:

\vec r = \frac{\vec u}{\|\vec u\|} \cdot \|\vec r\| (1)

Where:

\vec u - Original vector, dimensionless.

\|\vec u\| - Norm of the original vector, dimensionless.

\|\vec r\| - Norm of the new vector, dimensionless.

The norm of the original vector is determined by the following definition:

\|\vec u\| = \sqrt{\vec u\,\bullet \,\vec u} (2)

If we know that \vec u = (3, 2, -6), then the norm of the original vector is:

\|\vec u\| = \sqrt{(3)\cdot (3)+(2)\cdot (2)+(-6)\cdot (-6)}

\|\vec u\| = 7

If we know that \|\vec r\| = 2, then the new vector is:

\vec r = \frac{2}{7}\cdot (3,2,-6)

\vec r = \left(\frac{6}{7},\frac{4}{7},-\frac{12}{7}\right)

The vector is \vec r = \left(\frac{6}{7},\frac{4}{7},-\frac{12}{7}\right).

7 0
3 years ago
Solve by elimination<br> 4x+5y=15<br> 6x-4y=11
andreyandreev [35.5K]
{x,y}={5/21} hope this helped!
7 0
3 years ago
Find the value of y when x = 4 in the equation 4x - 2 = y + 5 Show your work help
elena-s [515]
First, substitute 4 into x
Then multiply 4 times 4
Subtract 2
Then subtract 5 from both sides

5 0
3 years ago
Read 2 more answers
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