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Aleks04 [339]
4 years ago
9

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. −5x − 25 = 78

Mathematics
2 answers:
EastWind [94]4 years ago
7 0

Answer:

A

Step-by-step explanation:

she should have added 25 to both

AnnyKZ [126]4 years ago
3 0

Answer:

A

Step-by-step explanation:

She should have added 25 to each side in order to cancel it out.

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Sonali's father age is 5 year 3 times more then Sonali. find out Sonali age if her father age is 44.​
enyata [817]
<h2><u>Given</u></h2>

  • Age of sonali father is year 3 times more then Sonali.

  • Age of sonali father is 44.

<h2><u>What </u><u>To </u><u>Find</u></h2>

  • Age of sonali

<h2><u>Solution</u></h2>

Let assume the age of sonali be x

  • ➡ Age of sonali = 3x + 5

  • ➡ Age of sonali father = 44

<h3><u>According to the </u><u>question</u></h3>

<u>\boxed{\sf  \: \large\bf{\red{  \implies}} \: \Large\rm{\purple{  3x + 5 = 44}}}</u>

Now , Solving this linear equation.

\begin{cases}\large\bf{\orange{  \implies}} \: \Large\tt{\blue{  3x + 5 = 44}}  \\  \\\large\bf{\orange{  \implies}} \: \Large\tt{\blue{  3x  \:  = \: 44 \:  -  \: 5}} \\  \\\large\bf{\orange{  \implies}} \: \Large\tt{\blue{  3x  \:  =  \:39 }} \\  \\\large\bf{\orange{  \implies}} \: \Large\tt{\blue{  x  \:  =  \:  \frac{39}{3} }} \\  \\  \large\bf{\orange{  \implies}} \: \Large\tt{\blue{  x  \:  =  \:  \frac{ \cancel{39}\rm \tiny{\red{   \:  \:  \small^{13} }}}{ \cancel{3}} }}  \\  \\\large\bf{\orange{  \implies}} \: \Large\tt{\blue{  x  \:  =  \: 13 }}\end{cases}

Hence , the age of sonali is 13 years.

5 0
3 years ago
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Can someone please answer. There is a picture. There is only one problem. Thank you so much!!!
Alecsey [184]
Hello,
Answer B
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6 0
3 years ago
Which algebraic expression is equivalent to the expression below? [x +2 - (5x + 5)]2
kvv77 [185]
<span>[x + 2 - (5x + 5)] ² =
[x + 2 - 5x - 5]² =
[x - 5x + 2 - 5]² =
[-4x - 3]² =
(-4x)² - 2.(-4x).3 + (-3)² =
16x² + 24x + 9

Answer:
</span>\boxed{C = 16x^2 + 24x + 9}<span>



</span>
6 0
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What is an example of a right angle, an acute triangle, and an obtuse triangle
Vitek1552 [10]
The example of a right angle is that it's exactly 90°, the acute angle is less than 90°, and the obtuse angle is more than 90° but less than 180°.

7 0
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rodikova [14]
Length=13
Height=10
Area=LxH/2 = 13x10/2= 130/2=65
Area=65
6 0
2 years ago
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