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Fynjy0 [20]
2 years ago
7

Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of drinks s

he needs to sell to earn $100.
1.25x + 1.49 = 100

What error did Barbara make in writing the equation?
Mathematics
1 answer:
Oksana_A [137]2 years ago
4 0
The way she put it implies that she will sell many water bottles and only one iced tea. the correct equation would be 1.25x+1.49y=100, as she may sell different amounts of each.
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The triangle shown below has an area of 121212 units^2 <br> 2<br> squared.<br> Find xxx.
dalvyx [7]

Answer:

4

Step-by-step explanation:

Let's set up an equation using the formula for the area of a triangle.

Hint #22 / 3

\begin{aligned} \text{Area of a triangle} &= \dfrac12 \cdot \text{base} \cdot \text{height}\\\\ 12&= \dfrac12 \cdot 6 \cdot x \\\\ 12&= 3x \\\\ \dfrac{12}{\blueD{3}}&= \dfrac{3x}{\blueD{3}} ~~~~~~~\text{divide both sides by } {\blueD{ 3}}\\\\ \dfrac{12}{\blueD{3}}&= \dfrac{\cancel{3}x}{\blueD{\cancel{3}}}\\\\ x &=\dfrac{12}{\blueD{3}}\\\\ x &=4\end{aligned}  

Area of a triangle

12

12

3

12

​  

 

3

12

​  

 

x

x

​  

 

=  

2

1

​  

⋅base⋅height

=  

2

1

​  

⋅6⋅x

=3x

=  

3

3x

​  

       divide both sides by 3

=  

3

​  

 

3

​  

x

​  

 

=  

3

12

​  

 

=4

​  

5 0
2 years ago
Let A be a 4×4 matrix and suppose that det(A)=3. For each of the following row operations, determine the value of det(B), where
spin [16.1K]

Answer:

a)3

b) 9

c) -3

Step-by-step explanation:

a) If B is obtained by adding a multiple of a row of A to another row of A, det (B) = det (A).

Then, det(B)=3.

b) If B is obtained by multiplying a row of A by k, then det (B) = kdet (A). Then det(B)=3det(A)=3*3=9

c) If B is obtained by exchanging two rows (columns) of A, then det (B) = - det (A). Then det (B) = - 3

6 0
2 years ago
Nia plans to put enough money in the bank each week for 100 weeks so that the amount in the bank is always proportional to the w
kobusy [5.1K]
Nia will have $250 in the savings account
6 0
2 years ago
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In the figure the horizontal lines are parallel and ab=bc=cd if lm =5 find jm
Leviafan [203]
Answer is c or 10

thanks!
7 0
2 years ago
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If a large cylinder has a volume of 28260 cubic cm, how many cylinders can be filled out of the large cylinder if the small cyli
inysia [295]
Hi,

To find the number of small cylinders that fit inside the big cylinder. You need to divide volume of small cylinder with the volume of big cylinder. We do this by using formula to calculate volume of cylinder:


v = \pi \times  {r}^{2}  \times h


To find radius just divide diameter with 2.

v = \pi \times   {2}^{2}  \times 6 \\ v = \pi \times 4 \times 6 \\ v = \pi \times 24 \\ v = 3.14 \times 24 \\ v = 75.4 {cm}^{3}


Now just division:

28260 \div 75.4 = 374.8

Answer: You could fit 374.8 smaller cylinders inside a big cylinder.

Hope this helps.
r3t40
7 0
2 years ago
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