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3 years ago

PLZ HELP ASAP WILL GIVE BRAINLEIST

Mathematics

2 answers:

Nookie1986 [14]3 years ago

8 0

Answer:

1)B

2)D

Step-by-step explanation:

Allisa [31]3 years ago

3 0

Answer:

the first is B

and the second is d

explanation:

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NISA [10]

For this case we must find the solution of the following quadratic equation:

$x ^ 2 + 5x + 7 = 0$

Where:

$a = 1\\b = 5\\c = 7$

Then, the solution is given by:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Substituting the values:

$x = \frac {-5 \pm \sqrt {5 ^ 2-4 (1) (7)}} {2 (1)}\\x = \frac {-5 \pm \sqrt {25-28}} {2}\\x = \frac {-5 \pm \sqrt {-3}} {2}$

By definition we have: $i ^ 2 = -1$

$x = \frac {-5 \pm \sqrt {3i ^ 2}} {2}\\x = \frac {-5 \pm i \sqrt {3}} {2}$

Thus, we have two complex roots.

Answer:

The equation has no real roots.

4 0

3 years ago

I need help on this ASAP so please help

In-s [12.5K]

Answer:

it’s 8 and 2 and 4 and 0

Step-by-step explanation:

this is because when you multiply 2x the x is an 8 so 2 times 8 is 16 then minus 2 is 14 which is greater than -4 same for my other answer

7 0

2 years ago

An amount of $25,000 is borrowed for 9 years at 9% interest, compounded annually. If the loan is paid in full at the end of that

Natasha_Volkova [10]

Please do not spam the same question, I have already answered it.

3 0

3 years ago

mrs.jarvis made 49 long sleeved blouses for the girls choir she sews 11 buttons on the front panel and 2 buttons on each sleeve

Alchen [17]

Answer:

she will need 735 buttons.

Step-by-step explanation:

11+2+2=15 buttons for each blouse

15x49=735 buttons total

8 0

3 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP!!

Marrrta [24]

Answer:

Fist one:

x−2=−3

Second one: a=63b/23

Third one: x=−a/2+3b/2

7 0

3 years ago