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Dmitry [639]
3 years ago
12

I NEED HELP ASAP!! WILL MAKE YOU BRAINLIEST IF RIGHT +40 points!

Mathematics
2 answers:
Simora [160]3 years ago
8 0

The standard form of a quadratic equation is ,

ax² + bx + c = 0.

And the formula to find the discriminant is b² - 4ac.

Here the first step is to change the given equation into standard form. So, add 1 to each sides of the equation. Therefore,

2x² – 9x + 2+1 = –1 + 1

2x² – 9x + 3 = 0

Next step is to compare the given equation with this equation to get the value of a, b and c.

After comparing the equations we will get a = 2, b = -9 and c = 3.

So, discriminant = b²- 4ac

=( -9)²-4 (2)(3)

= 81 - 24

= 57

So, discriminant of the given equation is 57.

57 is greater than 0 and square root of 57 will result real number.

So, the correct choice is C: The discriminant is greater than 0, so there are two real roots.

Nata [24]3 years ago
7 0

C. The discriminant is greater than 0, so there are two real roots.

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What is the value of x in the diagram?
Burka [1]
X=12 that’s your answer
3 0
3 years ago
Q7. Average of 60 numbers are 55. When 10 more numbers are included, the average of
Nikitich [7]

Answer:

The average of the 10 numbers is 195

Step-by-step explanation:

The average of a set of numbers is the sum of the numbers dividing by their number

  • Average = The sum ÷ The number

∵ The average of 60 numbers is 55

∴ The average = 55

∴ The number = 60

→ Substitute them in the rule above to find the sum of the numbers

∵ 55 = The sum ÷ 60

→ Multiply each side by 60

∴ 3300 = The sum

∴ The sum of the 60 numbers = 3300

∵ 10 more numbers are included

∵ The average of  70 numbers become 75

∴ The average = 75

∴ The number = 70

→ Substitute them in the rule above to find the sum of the numbers

∵ 75 = The sum ÷ 70

→ Multiply each side by 70

∴ 5250 = The sum

∴ The sum of the 70 numbers = 5250

∵ The sum of the 10 numbers that added is the difference between

   the sums of the 60 and 70 numbers

∵ The difference between the sums = 5250 - 3300

∴ The difference between the sums = 1950

→ To find the average of them divide their sum by 10

∵ The average of the 10 numbers = 1950 ÷ 10

∴  The average of the 10 numbers = 195

5 0
3 years ago
Philip did 14 setups on Monday 21 sit-ups on Tuesday and 28 sit-ups on Wednesday if the pattern continues how many sit-ups will
g100num [7]
So you add 7 every time so,

28+7=34
34+7=41

if he continues his pattern he will have done 41 sit-ups on Friday
7 0
3 years ago
Which number line represents the solution set for the inequality 3(8 – 4x) < 6(x – 5)?
Nady [450]

Answer:

x>3

Step-by-step explanation:

Which number line represents the solution set for the inequality 3(8 – 4x) < 6(x – 5)?

3 0
2 years ago
Brainliest if you answer my question​
kkurt [141]

Answer:

1

Step-by-step explanation:

To find x, set both equations equal to each other.

\sqrt{x}  =   \sqrt{5x - 4}

( { \sqrt{x} })^{2}  =  ({ \sqrt{5x - 4} })^{2}

x = 5x - 4

x - 5x = 5x - 5x - 4

- 4x =  - 4

- 4x \div  - 4 =  - 4 \div  - 4

x = 1

5 0
3 years ago
Read 2 more answers
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