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3 years ago

Please help!!!!!!!!!!!!!!!

Mathematics

1 answer:

mr_godi [17]3 years ago

4 0

Answer:

-141 is the answer.

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Would 2/5x+6/5=y be a proper answer format(i just want to know if it can be =y)

lukranit [14]

yes, it does not matter if the y is at the beginning or at the end. However, most teachers usually prefer to have the y at the beginning as it is easier to read.

6 0

3 years ago

Which of the following relation graphs represents a function?<br> A.

Makovka662 [10]

Answer:

The third one (parabola)

Step-by-step explanation:

Do a vertical line test.

Basically draw vertical lines over the function. If the x-value has more than one y-value then it is a relation and not a function

5 0

3 years ago

How many liters each of a 10% acid solution and a 80% acid solution must be used to produce 70 liters of a 65% acid solution?

stealth61 [152]

Assume you need x liters 10% acid, y liters 80% acid

Then 10%x + 80%y = 65%*70, and x+y = 70

I get: x = 15, y = 55

4 0

4 years ago

Solve the quadratic equation 4x2 − 121 = 0. Verify your answer using a difference-of-squares factoring method.

Alenkasestr [34]

Answer:

Option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

Step-by-step explanation:

Given quadratic equation is $4x^2-121=0$

To write the given quadratic equation by using a difference-of-squares factoring method:

$4x^2-121=0$

The above equation can be written as

$4x^2-11^2=0$

$(2x)^2-11^2=0$

The above equation is in the form of difference-of-squares

Therefore the given quadratic equation can be written in the form of difference-of-squares

by factoring method is $(2x)^2-11^2=0$

$(2x+11)(2x-11)=0$ (which is in the form $a^2-b^2=(a+b)(a-b)$ )

2x+11=0 or 2x-11=0

$x=\frac{-11}{2}$ or $2x=11$

$x=\frac{-11}{2}$ or $x=\frac{11}{2}$

$x=\pm \frac{11}{2}$

Therefore option d) is correct

That is x equals plus or minus start fraction 11 over two end fraction

5 0

3 years ago

35g = 5<br> 15s = 120<br> 2 questions

Lubov Fominskaja [6]

Step-by-step explanation:

35g=5 g=1/7

15s=120 s=8

6 0

4 years ago