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sukhopar [10]
3 years ago
5

Find the value of x in the equation below. 2.7+x=11.7

Mathematics
2 answers:
forsale [732]3 years ago
4 0

Answer:

the answer is 9

Step-by-step explanation:

djyliett [7]3 years ago
4 0
X=9 because 11.7-2.7= 9.
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The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +
lianna [129]
You have a system of equations \left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right..

1. Substitude right side of second equation into the left side of the first equation: -6x+6=-x^2+2x-9.

2. Solve this equation:
 x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4,  \\ \sqrt{D}=2,  \\ x_{1,2}=\dfrac{8\pm 2}{2  } =3,5.

3. Find y:
for x_1=3, y_1=-6\cdot 3+6=-18+6=-12,
for x_2=5, y_2=-6\cdot 5+6=-30+6=-24.

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.


7 0
3 years ago
Read 2 more answers
Their sum is 6 and their difference is 36<br> Help plz
Ivan

Answer:

Step-by-step explanation:

if you can use negative numbers then   you could use 21 and -15

so

adding them together is  21 + (-15) = 6

and then subtracting  21 - (-15) =

                                     21 + 15 = 36

do you think that would work ?  :/

3 0
3 years ago
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One safe investment pays 10% per year, and a more risky investment pays 13% per year.
Maru [420]

Answer:

0.10x + 0.13y = 10780

x + y = 100000

x = 74000 --------------10%

y = 26000 --------------13% (more risky)

8 0
2 years ago
I need some DETAILED examples of Dividing Integers! Urgent, pls help ASAP!
vfiekz [6]

Here are some examples:

Integers are positive and negative numbers, but dividing integers are dividing positive and negative numbers:

Remember these rules:

  1. Negative divided by a negative equals a positive.
  2. Negative divided by a positive equals a negative.
  3. Positive divided by a positive equals a positive .

Examples:

  • -4 \div 2 = -2
  • -4 \div -4 = 1
  • 4 \div 2 = 2

Hope this helps!

8 0
3 years ago
Help ASAP!! QR is the median of trapezoid MNOP. If MN = 41 and OP = 53, calculate QR.
stealth61 [152]

Answer:

QR = 86

Step-by-step explanation:

<em>Trust.</em>

5 0
3 years ago
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