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3 years ago

14

Lily solve the equation 3x-10= -3x+8. The explanation of her process is shown. Select the text that shows an error in her proces

s or justification of steps, if one exists.

1 answer:

MrMuchimi3 years ago

4 0

Answer:sbutaraction property of equality

Step-by-step explanation:

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Solve for x<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bx%7D%7Ba%7D%20%20%3D%20%20%5Cfrac%7Bx%7D%7Bb%7D%20" id="TexFormula

lesya [120]

$Domain:\ a\neq0\ \wedge\ b\neq0$

$\dfrac{x}{a}=\dfrac{x}{b}\qquad|\text{cross multiply}\\\\bx=ax\qquad|\text{subtract ax from both sides}\\\\bx-ax=0\\\\x(b-a)=0\qquad|\text{divide both sides by }\ b-a\neq0\\\\x=0$

$\dfrac{x}{a}=\dfrac{x}{b}\\\\if\ a\neq b\ then\ x=0\\\\if\ a=b\ then\ x\in\mathbb{R}$

6 0

3 years ago

A man mixed 2 teaspoons of sugar into his large coffee but then added one more teaspoon of sugar because it was not sweet enough

PIT_PIT [208]

Answer:

the ratio of teaspoons of sugar to one large coffee is 3: 1

Step-by-step explanation:

The computation of the ratio of sugar teaspoons to one large coffee is as follows:

Sugar teaspoons = 2 + 1 = 3

And, the one large coffee = 1

So, based on the above information

The ratio between them is

= 3:1

= 3 to 1

hence, the ratio of teaspoons of sugar to one large coffee is 3: 1

3 0

2 years ago

Find the value of x .

Stels [109]

Answer:

4x+2x=90

6x=90

x=15

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

15 + (-15) = <br><br> SOLVEE<br><br> 10 points

prisoha [69]

15+(-15)=0 I hope this helps

4 0

3 years ago

Read 2 more answers

Giselle pays $220 in advance on her account at the athletic club. Each time she uses the club,

ale4655 [162]

Answer:

$y=220-15x$

Step-by-step explanation:

Let x represent the number of times Giselle uses the athletic club and y represent money left in account.

We have been given that each time she uses the club, $15 is deducted from the account. The amount used after using the club after x times would be $15x$ .

We are also told that Giselle pays $220 in advance on her account at the athletic club.

The money left in account after x uses of athletic club would be money in account initially minus amount used for using the club x times.

$y=220-15x$

Therefore, our required equation would be $y=220-15x$ .

5 0

3 years ago