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Mazyrski [523]
3 years ago
7

2 (a - 5) - 5 = 3 Marking brainliest

Mathematics
2 answers:
mixer [17]3 years ago
6 0

Answer:

a = 9

Step-by-step explanation:

2(a-5)-5=3

2a-10-5=3

2a-15=3

2a=18

a=9

tekilochka [14]3 years ago
3 0

Answer:

9

Step-by-step explanation:

2a-10-15=3

2a=18

a=9

hope you get the explanation

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A wall in Marcus's bedroom is 8 2/5 feet high and 18 1/3 feet long. If he paints 1/2 of the wall blue, how many square feet will
goldenfox [79]
\bf \textit{so the area of the wall is then }8\frac{2}{5}\times 18\frac{1}{3}
\\\\\\
\textit{how much is }\frac{1}{2}\textit{ of that product?}\quad \cfrac{8\frac{2}{5}\times 18\frac{1}{3}}{2}\\\\
-------------------------------\\\\

\bf \begin{cases}
8\frac{2}{5}\implies \cfrac{8\cdot 5+2}{5}\implies &\cfrac{42}{5}\\\\
18\frac{1}{3}\implies \cfrac{18\cdot 3+1}{3}\implies &\cfrac{55}{3}
\end{cases}
\\\\\\
\cfrac{8\frac{2}{5}\times 18\frac{1}{3}}{2}\implies \cfrac{\frac{42}{5}\cdot \frac{55}{3}}{\frac{2}{1}}\implies \cfrac{\frac{42\cdot 55}{5\cdot 3}}{\frac{2}{1}}\implies \cfrac{42\cdot 55}{5\cdot 3}\cdot \cfrac{1}{2}\implies \cfrac{42\cdot 55\cdot 1}{5\cdot 3\cdot 2}
\\\\\\
\cfrac{2310}{30}\implies 77
7 0
4 years ago
Find the value for b. 3x^2– X-10 =0<br>​
Greeley [361]

Answer:

3x^2 -(6-5)x-10=0

3x^2 -6x+5x-10=0

3x(x-2)+5(x-2)=0

(x-2) (3x+5) = 0

either,

x -2 =0

x=2

then,

3x +5=0

x= -5/3

3 0
3 years ago
7/5= blank write improper fraction as a mixed number
Ostrovityanka [42]
Hello!

To do this you see how many times 5 goes into 7. As you can see it only goes in once. This gives us a whole number one. Since we took away 5 we have two sevens left. This gives us the mixed number below.

1 \frac{2}{7}

I hope this helps!
8 0
3 years ago
Which of the following samples would constitute a biased sample?
AVprozaik [17]

Answer:

Among the given samples the sample which constitute a biased sample is given by, the sample obtained by,

'Surveying   randomly among seventh grade girls of a school to determine what theme the whole school would prefer for the dance.'

Step-by-step explanation:

Among the given samples the sample which constitute a biased sample is given by, the sample obtained by,

'Surveying   randomly among seventh grade girls of a school to determine what theme the whole school would prefer for the dance.' since the choices of those seventh grade girls in the sample may not reflect those of the whole school.

4 0
3 years ago
I need some help with this question <br> Help needed!!
saul85 [17]
The answer is d i think
8 0
3 years ago
Read 2 more answers
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