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drek231 [11]
3 years ago
7

Solve the following equation: x2-5=7

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

x= 6

Step-by-step explanation:

Step 1: Write equation

2x - 5 = 7

Step 2: Solve for <em>x</em>

<u>Add 5 to both sides:</u> 2x = 12

<u>Divide both sides by 2:</u> x= 6

<u />

Step 3: Check

<em>Plug in x to verify if it's a solution.</em>

2(6) - 5 = 7

12 - 5 = 7

7 = 7

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Factor completely 12x4 + 6x3 + 18x2.
Semmy [17]

Answer:

B)3x^2 (4*x^2 + 2x + 6)

Step-by-step explanation:

Step 1: Find the Greatest common factor of the given expression.

12x^4 + 6x^3 + 18x^2

The above expression can be written as .

= 2*2*3*x^4 + 2*3*x^3 + 2*3*3*x^2

Here 3x^2 is prime factor


Step 2: Let's take out the 3x^{2} and write the remaining terms in the parenthesis.

= 3x^2 (2*2*x^2 + 2x + 2*3)

= 3x^2 (4x^2 + 2x + 6)

Therefore, the answer is B)3x^2 (4*x^2 + 2x + 6)

Thank you.

8 0
3 years ago
A sum has five addends. Each addend is a unit fraction. The sum is 1. What are the addends?
Bogdan [553]
I would assume 1/5 is your answer. As 1/5+1/5+1/5+1/5+1/5 = 5/5 which is 1.
4 0
3 years ago
Read 2 more answers
A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks:
asambeis [7]
y = 0.012x + 0.65<span><span><span>

Number of pages </span> <span>     50.00    </span><span>  100.00 </span><span>   150.00 </span> <span>   200.00 </span> </span> <span> <span> 
Cost </span> <span>                           1.25 </span> <span>         1.85 </span> <span>       2.45 </span> <span>       3.05

x = number of pages
y = cost

intervals of x = 50 pages
intervals of y = 0.60
0.60 / 50 = 0.012

y = 0.012x + 0.65

</span></span></span><span> <span> </span><span><span> <span>                      x </span> <span>      0.012*x </span> <span>              y  </span>
</span> <span> 0.012 <span>           50 </span> <span>         0.60 </span> <span>    0.65 </span> <span>   1.25
</span></span><span>0.012 <span>         100 </span> <span>         1.20 </span> <span>    0.65 </span> <span>   1.85
</span> </span> <span> 0.012 <span>         150 </span> <span>         1.80 </span> <span>    0.65 </span> <span>   2.45
</span> </span> <span> 0.012 <span>         200 </span> <span>         2.40 </span> <span>    0.65 </span> <span>   3.05 </span> </span></span></span><span>
</span>
5 0
3 years ago
When four times a number is decreased by 9, the result is 19. What is the number?
Novay_Z [31]

Answer:

7

Step-by-step explanation:

Working backwards:

19 + 9 = 28

28/ 4 = 7

Checking work:

7 x 4 = 28

28 - 9 = 19

8 0
2 years ago
Read 2 more answers
Why isn't 11 called onty-one ?
Usimov [2.4K]
Because thats not how its pronounced anymore.

Happy studying ^_^

3 0
3 years ago
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