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
rjkz [21]
2 years ago
14

You have 6L of water that has 20 percent strawberry juice. How many litres of an 80 percent strawberry juice should be added to

the mixture to make 55 percent strawberry juice?
The answer I came up with was 8.4 but I don't know if I am correct.
Mathematics
1 answer:
Kaylis [27]2 years ago
7 0

Answer:

you are right

Step-by-step explanation:

You might be interested in
Use cross products to find the area of the triangle in the xy-plane defined by (1, 2), (3, 4), and (−7, 7).
Free_Kalibri [48]

I love these. It's often called the Shoelace Formula. It actually works for the area of any 2D polygon.


We can derive it by first imagining our triangle in the first quadrant, one vertex at the origin, one at (a,b), one at (c,d), with (0,0),(a,b),(c,d) in counterclockwise order.


Our triangle is inscribed in the a \times d rectangle. There are three right triangles in that rectangle that aren't part of our triangle. When we subtract the area of the right triangles from the area of the rectangle we're left with the area S of our triangle.


S = ad - \frac 1 2 ab -  \frac 1 2 cd - \frac 1 2 (a-c)(d-b) = \frac 1 2(2 ad - ab -cd - ad +ab +cd -bc) = \frac 1 2(ad -bc)


That's the cross product in the purest form. When we're away from the origin, a arbitrary triangle with vertices A(x_1, y_1), B(x_2, y_2), C(x_3, y_3) will have the same area as one whose vertex C is translated to the origin.


We set a=x_1 - x_3, b= y_1  - y_3, c=x_2 - x_3, d=y_2- y_3


S= ad-bc=(x_1 - x_3)(y_2 - y_3) -(x_2-x_3)(y_1 - y_3)


That's a perfectly useful formula right there. But it's usually multiplied out:


S= x_1y_2 - x_1 y_3  - x_3y_2 + x_3 y_3 - x_2 y_1 + x_2y_3 + x_3 y_1 - x_3 y_3


S= x_1 y_2 - x_2 y_1  + x_2y_3 - x_3y_2   + x_3 y_1 - x_1 y_3


That's the usual form, the sum of cross products. Let's line up our numbers to make it easier.


(1, 2), (3, 4), (−7, 7)

(−7, 7),(1, 2), (3, 4),


[tex]A = \frac 1 2 ( 1(7)-2(-7) + 3(2)-4(1) + -7(4) - (7)(3)

8 0
3 years ago
How many boxes of markers must be sold for the company’s income to equal the cost of production
Margaret [11]
C. 200

They earn $2.50 per box of markers, meaning that to make $500 they have to sell 200. [500/2.5=200]
6 0
2 years ago
I put $500 in a saving account that warns 7% interest compounded quarterly. How much will be in the account after 1 year? Rounde
Fantom [35]
\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$500\\
r=rate\to 7\%\to \frac{7}{100}\to &0.07\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{quarterly, thus four}
\end{array}\to &4\\
t=years\to &1
\end{cases}
\\\\\\
A=500\left(1+\frac{0.07}{4}\right)^{4\cdot 1}\implies A=500(1.0175)^4\implies A\approx 535.92951564
5 0
3 years ago
Buying a 30 dollar shirt for $30 and getting a second shirt of equal value for 50%off
Goshia [24]

Answer:

you saved 15 bucks if you get the second one

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
5x + 3y = -3 <br><br> 2X - 3y = 24
gregori [183]

Answer:

Y=-5/3x-1

y=2/3x-8

If you are adding then it is:

7x=21

x=3

Step-by-step explanation:

5x+3y=-3

3y=-5x-3

y=-5/3-1

2x-3y=24

-3y=-2x+24

y=2/3x-8

5 0
3 years ago
Read 2 more answers
Other questions:
  • Please help ASAP 20 pts + brainliest to right/best answer
    12·1 answer
  • What is one fifth times twenty six
    13·2 answers
  • Please Help!
    9·2 answers
  • Write the fraction or mixed number and the decimal shown by the model
    9·1 answer
  • What number is 24% of 80
    5·1 answer
  • Question 18 (4 points)
    9·1 answer
  • 1 3 4 21 <br> + = + = <br> 7 4
    6·1 answer
  • A philanthropic organization helped a town in Africa dig several wells to gain access to clean water. Before the wells were in p
    9·1 answer
  • Please answer these questions: are they rational or irrational numbers?
    11·1 answer
  • Simplify : p^2-p-12/p^2-10p+24​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!