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Anika [276]
3 years ago
12

Solve for x 3x - 2 (x - 4) = 5 (2x + 1 )

Mathematics
2 answers:
Ivahew [28]3 years ago
4 0

Answer:

3x–2x+8 = 10x+5

=> x + 8 = 10x + 5

=> 8 – 5 = 10x – x

=> 9x = 3

=> x = 3/9

=> x = 1/3

Illusion [34]3 years ago
3 0

Answer:

yes

Step-by-step explanation:

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Sara is 9 years younger than her brother, Michael. The sum of their ages is 47 years. How old is Sara and how old is her brother
kotykmax [81]

Answer:

Michael is 38 and Sara is 29

Step-by-step explanation:

Because it says the sum of their age is 47 you do 47-9=38 so that would be Michael's age and than because Sara is 9 years younger than him and then you would do 38-9=29

7 0
2 years ago
Estimate by division ..70/9.24
astraxan [27]
The answer is 7.58

hope this helped :)
alisa202
6 0
3 years ago
Read 2 more answers
Solve and find the integer of 4x^2-19x-5
Anarel [89]
(x-5)(4x+1)
4x^2 times -5 is -20 the factors of -20 are -1x20, 1x-20... but to make the -19x you would add together the 1 and -20 because 1-20 is -19.
This then splits off to factorise 4x^2-20x, making this side 4x(1x-5) carry the brackets over to make it 1(1x-5) joining the brackets together to make (4x+1)(x-5) 

5 0
3 years ago
If 10^2y = 25, then 10^-y equals:<br>(a) -1/5<br>(b) 1/625<br>(c) 1/50<br>(d) 1/25<br>(e) 1/5​
Gemiola [76]
<h3><u>given</u><u>:</u></h3>

<u>10 ^{2y}  = 25</u>

<h3><u>to</u><u> </u><u>find</u><u>:</u></h3>

<u>{10}^{y}  = .......</u>

<h3><u>solution</u><u>:</u></h3>

<u>10 ^{2y}  = 25</u>

<u>(10y {)}^{2}  =  {5}^{2}</u>

<u>10y = 5</u>

<u>\frac{1}{ {10}^{y} }  =  \frac{1}{5}</u>

<u>{10}^{ - y}  =  \frac{1}{5}</u>

<u>therefore</u><u>,</u><u> </u><u>the</u><u> </u><u>correct</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>option</u><u> </u><u>E</u><u>.</u>

8 0
2 years ago
Read 2 more answers
PLEASE HELP MEEEEE
Elena-2011 [213]

Answer:

a = 36 and a = 27

Step-by-step explanation:

The geometric mean of two numbers is the square root of the product of the two numbers.

Say for example we have the numbers x and y, the geometric mean z is mathematically;

z = √xy

For the first question, our z is 12, x and y are 4 and a respectively.

12 = √4a

square both sides

144 = 4a

a = 144/4

a = 36

For the second question

z is 9, x and y are 3 and a respectively

9 = √3a

square both sides

81 = 3a

a = 81/3

a = 27

5 0
3 years ago
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