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Iteru [2.4K]
3 years ago
7

X^2=3x+3 using the quadratic formula,show steps

Mathematics
1 answer:
o-na [289]3 years ago
8 0
X²=3x+3
x²-3x-3=0. have to get 0 on right first
identify a,b,c. a is 1, b is -3, c is -3
now plug in to the quadratic formula...

x = -b±√(b²-4*a*c) / 2a

x = -(-3) ± √((-3)²-4*1*(-3)) / (2*1)

x= 3 ± √(9- -12) / 2

x=( 3 ± √21) /2
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What's the reciprocal of 2 4/7 ?​
Gnom [1K]

Answer:

7/18

Step-by-step explanation:

²\frac{4}{7}=((2*7)+4)/7

2*7=14

14+4=18

18/7⇒7/18

4 0
3 years ago
Solve the equations PLEASEE<br><br> -1=3x-2<br><br> -3x=9<br><br> -10=-5x
Ilia_Sergeevich [38]

Answers are in bold:

-1=3x-2

add 2 to both sides

-1+2=3x-2+2

1=3x

divide both sides by 3

1÷3=3x÷3

1/3=x

-3x=9

divide both sides by -3

-3x÷-3=9÷-3

x=-3

-10=-5x

divide both sides by -5

-10÷-5=-5x÷-5

2=x

I hope this is good enough:

6 0
3 years ago
Solve this n get pts :)​
Simora [160]
D+100+40=180
d=180-100-40=40 (sum of all angles)
e= 100+40= 140 (exterior angle)
180-140=40
C+50+40=180
C=180-50-40= 90 (right angle)
A=50
B=180-90-50= 40
8 0
2 years ago
The sum of two numbers is 28<br> and their product is 180.<br> Find the numbers.
zubka84 [21]
The answer is 10 and 18
7 0
3 years ago
Read 2 more answers
PLEASE HELP!!! I need an urgent answer and I'll give brainiest just please answer this easy question!
Leya [2.2K]

Answer:

y , add 7, multiply by 3, then subtract 6.or Solve the system of equations and choose the correct answer from the list of options. x − y = 7 y = 3x + 12 2 over 19 comma 2 over 33 negative 2 over 19 comma negative 33 over 2 negative 19 over 2 comma negative 33 over 2 19 over 2 comma 33 over 2

Step-by-step explanation:

3 0
2 years ago
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