3 years ago

Please hurry please

Mathematics

1 answer:

Elza [17]3 years ago

3 0

Answer:

C is greater than or equal to 20, so the answer is C=20

You might be interested in

Factor the quadratic equation below to reveal the solutions. X^2+4x-21=-9

a_sh-v [17]

Answer:

x = 3 and x = -7

Step-by-step explanation:

The given quadratic equation is $x^2+4x-21=0$ . We need to find the solution of this equation.

If the equation is in the form of $ax^2+bx+c=0$ , then its solutions are given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Here, a = 1, b = 4 and c = -21

Plugging all the values in the value of x, such that :

$x=\dfrac{-b+ \sqrt{b^2-4ac} }{2a},\dfrac{-b- \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-4+ \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)},\dfrac{-4- \sqrt{(4)^2-4\times 1\times (-21)} }{2(1)}\\\\x=3, -7$

So, the solutions of the quadratic equation are 3 and -7.

6 0

3 years ago

I need help please ..

koban [17]

A is 18

B is 162

C is 18

D is 162

4 0

3 years ago

Pre algebra help ( will give brainliest ) sorry if it's hard to see

valentinak56 [21]

It would have changed by 1/3 is ur answer

4 0

3 years ago

Read 2 more answers

Covert 110% to a decimal

omeli [17]

That would be 1.1 in decimals.

5 0

3 years ago

Please help meeeeee ASAP

Fiesta28 [93]

Answer:

36 degrees

Step-by-step explanation:

180 - 58 = 122 degrees

122 - 90 = 32 degrees

32 + 4 = 36 degrees

8 0

3 years ago

Read 2 more answers