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
tigry1 [53]
4 years ago
8

I REALLY NEED HELP ON THESE QUESTIONS!!!! IM SOOO STUCK!!!!

Mathematics
1 answer:
Ainat [17]4 years ago
3 0
X = price Sumatra, y = price Celebes

12*x + 4*y=15

4*x + 12*y = 21

Now, solve it. For instance (there are many ways):

Multiply the second equation by (-3):

12*x + 4*y=15

-12*x  -36*y = -63

Sum them up (x cancel out. That's why we multiply by -3)

-32y=-48,  y = 48/32=6/4=3/2

y = 3/2 and x = go to any equation. Say the second again:

4*x + 12*y = 21

4x + 12*3/2 =21 ----> 4x + 18=21, 4x = 3, x = 3/4.

So cost of Sumatra $ 3/2  per oz, or $ 1.50

Cost of Celebes Kalossi (what a name!) $ 3/4 per oz = $ 0.75 per oz

Let's check it with the first equation:

12*0.75+4*1.5 = 15!

Clear?



You might be interested in
A weather service records 28.8 inches of rain over a 12 month period. What is the average rainfall per month for the year?
Basile [38]

Answer:

B) 2.4 inches

Step-by-step explanation:

The total amount of rain is 28.8 inches over 12 months. To find how much rain falls averagely in <em>one </em>month you need to divide the total by the amount of months. 28.8/12 = 2.4

6 0
3 years ago
If a 50 foot cable supporting a circus tent
natta225 [31]

Step-by-step explanation:

using formula that cos= b/h

3 0
3 years ago
Find the standard form of the equation for the conic section represented by x^2 + 10x + 6y = 47.
Levart [38]

Answer:

The standard form of the equation for the conic section represented by x^2\:+\:10x\:+\:6y\:=\:47 is:

4\left(-\frac{3}{2}\right)\left(y-12\right)=\left(x-\left(-5\right)\right)^2

Step-by-step explanation:

We know that:

4p\left(y-k\right)=\left(x-h\right)^2 is the standard equation for an up-down facing Parabola with vertex at (h, k), and focal length |p|.

Given the equation

x^2\:+\:10x\:+\:6y\:=\:47

Rewriting the equation in the standard form

4\left(-\frac{3}{2}\right)\left(y-12\right)=\left(x-\left(-5\right)\right)^2

Thus,

The vertex (h, k) = (-5, 12)

Please also check the attached graph.

Therefore, the standard form of the equation for the conic section represented by x^2\:+\:10x\:+\:6y\:=\:47 is:

4\left(-\frac{3}{2}\right)\left(y-12\right)=\left(x-\left(-5\right)\right)^2

where

vertex (h, k) = (-5, 12)

7 0
3 years ago
Help w graph proportional relationships questions!
stiv31 [10]
You're welcome! This took me forever!

6 0
3 years ago
If u can help with this question, the options for both x' s are -8,-7,-6,-5,-4,-3,-2,-1,1,2,3,4,5,6,7,8
Simora [160]
1x + 1y = 100....multiply by -3/8
3/8x + 7/8y = 2000

no need to multiply the other equation by anything....the x's will cancel because one will be -3/8x and one will be 3/8x


8 0
3 years ago
Other questions:
  • Find the value of x in each case. PLEASE SHOW WORK!!!
    12·1 answer
  • **At noon the minute and the hour hands overlap. When will it happen next?
    6·1 answer
  • PLEASE FAST. Will give brainliest. Select the correct answer.
    7·1 answer
  • PLS SOLVE THIS ASAP!!!!
    8·1 answer
  • Twenty college students were asked for their number of close friends; persons who showed sympathy when needed and helped in hard
    15·1 answer
  • Which statement is true about the value of (6)? A.(6) greater-than 6
    14·1 answer
  • Write the polynomial function of least degree that has zeros of x=-i and x=1​
    15·1 answer
  • Find the dimensions of a rectangle with perimeter 76 m whose area is as large as possible. m (smaller value) m (larger value)
    5·1 answer
  • Samantha is solving a
    15·1 answer
  • Help me find the answers please
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!