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Karolina [17]
3 years ago
13

Helllllpppppp!

Mathematics
2 answers:
Akimi4 [234]3 years ago
8 0

Answer:

Step-by-step explanation:

The system of equations is:

● 3x + 2y = 7

● 2x + 4y = 8

Where x is the price of a single coffee and y is the price of a single coffee

We will solve this simultaneous equations using the graphing method:

The solutions is the intersection point of to the lines.

(Picture below)

The intersection point is (1.5,1.25)

andreyandreev [35.5K]3 years ago
5 0

Answer:

x = 1.5

y =1.25

Step-by-step explanation:

3x+2y=7

2x+4y=8

Multiply the first equation by -2

-2(3x+2y=7 )

-6x-4y = -14

Add this to the second equation

-6x-4y = -14

2x+4y=8

----------------

-4x = -6

Divide by -4

-4x/-4 = -6/-4

x = 1.5

Now find y

3x+2y=7

3(1.5) + 2y = 7

4.5 +2y = 7

Subtract 4.5 from each side

2y = 2.5

Divide by 2

y = 1.25

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Use algebraic means to show that x^2 + y^2 = 8 is not a function. Explain your process.
11Alexandr11 [23.1K]

Answer:

For a single value of x function has more than one corresponding value of y which satisfies the equation.

Step-by-step explanation:

Function: A relationship between a set of inputs and a set of possible outputs, where exactly one output is associated with each input.

It means for an equation to represent a function any single value of  x there should be only one corresponding value of  y which satisfies the equation.

Now consider the given equation.

x^2 + y^2 = 8

If we put x=0 then we get two value of y i.e \sqrt8 and -\sqrt8 which satisfy the equation  and therefore the equation is not a function.

5 0
4 years ago
23 POINTS! NINTH GRADE ALGEBRA HOMEWORK PLEASE HELP ASAP!!
DaniilM [7]

\frac{ - b \sqrt{b {}^{2}  - 4 \times a \times b} }{ - 2 \times a}
a =  {x}^{2}  \\ b = x \\ c = 12
\frac{ - ( - 2) \sqrt{ { - 2}^{2}  - 4 \times 2(x)\times  - 12} }{  -  2 \times 2}
8 0
4 years ago
Someone please help me with this question, I don’t know what to do.
Lelu [443]

Answer:

22.5

Step-by-step explanation:

What you need to do is calculate the volume of the Box. With the box being the volume of the piramid added to the prism surrounding the box with volume 15.

If you want to calculate it yourself stop reading here, because I will work it out now.

Volume box = a*b*c

Volume prism = 15

Volume pyramid = (b * c * a)/3

The prism has the volume of the box minus the pyramid so

abc - (abc)/3 = 15

abc - (1/3)abc = 15

(2/3)abc = 15

abc = 22.5

So 22.5 is the volume of the figure

8 0
4 years ago
What's the simplified Expression of 5y+5-2x-2+6y-x0​
ziro4ka [17]

im pretty sure its (6,0). 5.

3 0
2 years ago
Read 2 more answers
28% of 63 is what? i'm so confused right now
Daniel [21]

Answer:

\displaystyle 17\frac{16}{25}

Step-by-step explanation:

\displaystyle 28\%\:of\:63 \\ \\ \frac{7}{25} \times 63 = \frac{441}{25} \\ \\ \boxed{\boxed{17\frac{16}{25}}}

To turn 63% into a fraction, write it as a fraction over 100, then simplify it:

\displaystyle \boxed{\frac{7}{25}} = \frac{28}{100}

I am joyous to assist you at any time.

6 0
2 years ago
Read 2 more answers
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