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beks73 [17]
2 years ago
14

HELP!

-7" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
katen-ka-za [31]2 years ago
6 0

\huge \huge \huge\huge\mathrm{ \boxed{ \boxed{ \boxed{ \boxed{ \boxed {\boxed{  \huge\mathfrak{ Solution}}}}}}}}

  • \sqrt{x - 1}   - x =  - 7

  • \sqrt{x - 1}  =x  - 7

  • x - 1 = (x - 7) {}^{2}

  • x - 1 =  {x}^{2}  + 49 - 14x

  • {x}^{2}  - 14x + 49 - x + 1 = 0

  • {x}^{2}  - 15x + 50 = 0

  • {x}^{2}  - 10x - 5x + 50 = 0

  • x(x - 10) - 5(x - 10) = 0

  • (x - 5)(x - 10) = 0

  • x = 5 \:  \:  \: or \:  \:  \: x = 10

Tresset [83]2 years ago
5 0

Answer:

refer the Attachment for answer

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Difference between<br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B5%7D%20%20-%20%20%5Cfrac%7B3%7D%7B10%7D%20" id="TexF
vampirchik [111]

Step-by-step explanation:

  • see below

\longrightarrow \:  \frac{4}{5}  -  \frac{3}{10}

\longrightarrow \:  \frac{8 - 3}{10}

\longrightarrow \: \cancel{\frac{5}{10} }

\longrightarrow \:  \frac{1}{2}

3 0
2 years ago
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John saves N$ 4225 the first month and every month later decreases it by N$ 65. How much will much John save in the 13th month?
castortr0y [4]

Answer:

nadaa

Step-by-step explanation:

4 0
3 years ago
Mrs. Williamson had 18 students in her homeroom at the beginning of the school year and 24 students at the end of the year. What
jarptica [38.1K]

Answer:

25%

Step-by-step explanation:

An easy way to figure this out is just by dividing the initial amount of students (18) by the current amount of students (24), and then subtracting 1.

So, 18/24 = 0.75 (aka 75%), and  1 - 0.75 = 0.25 (aka 25%)

7 0
2 years ago
Simplify the expression. Write your answer as a power.
Dafna11 [192]

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5002.46412961

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8 0
3 years ago
Among 500 freshmen pursuing a business degree at a university, 311 are enrolled in an economics course, 243 are enrolled in a ma
Allushta [10]

Solution :

Let A = Economics, B = Mathematics

n(A) = 311, n(B) = 243, $n(A \cap B) = 135$

a). So, $n(A \cup B) = n(A) +n(B) - n(A \cap B)$

                     = 311 + 243 - 135

                     = 419

b). n(A only) = 311 - 135

                   = 176

     n(B only) = 243 - 135

                   = 108

Exactly one of these two courses

  $=\frac{176+108}{500}$

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    $=\frac{500-419}{500} $

  $=\frac{81}{500}$

 = 0.162

7 0
3 years ago
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