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2 years ago

When solving this system by elimination, which variable is the most convenient to eliminate,

Mathematics

1 answer:

kobusy [5.1K]2 years ago

4 0

Answer:

Y is the appropriate variable and the most easiest and convenient to eliminate

name 2x + y = 7 as equation i

and 3/2 x - y = 7/2 as equation ii

then add equation i and ii together

(3/2 + 2) x + y - y = (7 + 7/2)

(7/2) x = (21/2)

x = 3

then put in x = 3 in equation i

4 + y = 7

x = 7 - 4

x = 3

Therefore x = 3 and y = 3

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Which best explains why the equation 7x + 3 = 7x + 3 has infinitely many<br> solutions?

DochEvi [55]

Answer:

Step-by-step explanation:

both sides are equal to begin with so any x that you put in, will get multiplied by 7 and have 3 added to it

7 0

3 years ago

algol [13]

Answer:

Step-by-step explanation:

We have the two functions:

$f(x)=\sqrt{x}+12\text{ and } g(x)=2\sqrt{x}$

And we want to find (f-g)(144).

This is the same thing to f(144)-g(144).

So, let’s determine the value of f(144) and g(144) first:

$\begin{aligned} f(144)&=\sqrt{144}+12 \\ &=12+12 \\ &=24\end{aligned}$

And:

$\begin{aligned} g(144)&=2\sqrt{144} \\ &=2(12) \\ &=24 \end{aligned}$

Hence:

$\begin{aligned} (f-g)(144) &= f(144)-g(144) \\ &=24-24 \\ &=0 \end{aligned}$

Our final answer is 0.

6 0

3 years ago

Read 2 more answers

Last year, Philip Rivers' passing percentage was 66%, which means he completed 66% of his

statuscvo [17]

Answer:

363

Step-by-step explanation:

0.66*550=363

8 0

3 years ago

The Jacksons sublet their summer cottage during the winter and spring months. For each month they receive 72% of their monthly m

miskamm [114]

Answer:

7,560

Step-by-step explanation:

70% of 1750 × 6 = 7,560

3 0

2 years ago

2x^2+9x+6=0 quadtratic equation

Studentka2010 [4]

Hello from MrBillDoesMath!

Answer:

x = ( -9 + sqrt(33) ) /4

and

x = ( -9 - sqrt(33) ) /4

Discussion:

Using the quadratic formula with a = 2, b = 9 and c = 6 gives

x = ( -b +\- sqrt(b^2-4ac) )/2a

x = ( -9 +\- sqrt(9^2 - 4*2*6)) / (2*2) =>

x = ( -9 +\- sqrt (81- 48)) / 4 =>

x = ( -9 +\- sqrt(33) ) /4

Thank you,

MrB

5 0

3 years ago