2 years ago

Chris worked 45 hours at the library last week. If he gets time and a half for overtime and his

Mathematics

1 answer:

tia_tia [17]2 years ago

6 0

The answer is c. I had to do this one on a test and the teacher put this one on the bored

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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.

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3 years ago

V-15=-27 what's they equation

andrezito [222]

V would be equal to -12

7 0

2 years ago

Read 2 more answers

Jessica went to the mall on Saturday to buy clothes she spent $848 on a shirt and 408 dollars on pants in total how much money d

amid [387]

Answer:

Step-by-step explanation: the money that Jessica spend on clothing is 1256

3 0

2 years ago

If we wanted to know how high a 5th-grade student could jump, how many students would be reasonable to test? 5, 12, 30, or 200.

77julia77 [94]

The right amount to test would be 30.

200 is to many kids and 12 is not enough.

Hope this Helps!!

4 0

2 years ago

Help plzz will mark brainleast

alex41 [277]

Answer:

rectangular prism

Step-by-step explanation:

maybeeee

sorry if it wrong :l

7 0

3 years ago