X2=x2+2x+9
x2-x2=2x+9
2x+9=0
2x=-9
x=-9/2
Answer:
x = - 12 6/7
Step-by-step explanation:
x - 12x/5= 18
Get a common denominator on the left
5/5 x -12/5x = 18
Subtract
-7/5 x = 18
Multiply each side by -5/7 to isolate x
-5/7 *-7/5 x = -5/7 *18
x = -5*18/7
x = -90/7
Changing this to a mixed number
7 goes into 90 1 2 times with 6 left over
x = - 12 6/7
Answer:
-(-5) ± √13 5 ± √13
x = ----------------------- = ---------------
2(3) 6
Step-by-step explanation:
This is a quadratic equation, with coefficients 3, -5 and 1.
The discriminant, b² - 4ac, turns out to be (-5)² - 4(3)(1), or 25 - 12 = 13
Thus, the roots are:
-(-5) ± √13 5 ± √13
x = ----------------------- = ---------------
2(3) 6
Before you begin, familiarize yourself and keep in mind the
order of operations- PEMDAS (parenthesis, exponents, multiplication, division,
addition, subtraction). You must do all math problems using this.
17. Add all the
numerators since they are like-terms. 12/3 – then simplify it – 4.
18. Do the inner most
parenthesis first, add the numerators – 3/5. To multiply a fraction and a whole
number, multiply the numerator and the whole number, and then simplify – 15/5,
3, then divide 15 by 3 – and your answer
is 5.
19. Parenthesis first – 10/6. Then multiply the numerator
and the whole number and simplify – 120/6 – 20.
20. Parenthesis – 4.2 – multiply by 8 – 33.6.
21. Parenthesis – 4 – multiply by 3.6 – 14.4.
22. PEMDAS, so division goes before subtraction – 8.4.
Try the rest for yourself; that’s the only way you’ll learn.
Feel free to message me for more help.
Answer:
52 degrees
Step-by-step explanation:
Every triangles angles sum up to 180 degrees
83+45=128
180-128=52 degrees
