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enot [183]
2 years ago
6

I need help on both of the question

Mathematics
1 answer:
garri49 [273]2 years ago
6 0

Answer:

:)

Step-by-step explanation:

1/2 times 5= 5/2= 2   1/2

3/4 times 8= 24/4= 6

1=5/2

2=24/4 or 6

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24 is 30% of what? <br><br> Help
Radda [10]
    <u>24</u> = <u>30</u>
      x = 100
 <u>30x</u> = <u>2400</u>
  30  =   30
      x = 80
4 0
2 years ago
Simplify 6 cm : 1.5 m
Zolol [24]

6cm=0.06m

0.06m : 1.5m

6m : 150m

1m : 35m

4 0
2 years ago
X/5+7= -3<br> Please helppppp meeeee I neeeddd heeeelppp quickly
anastassius [24]

Answer:

x=−50

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
. Andrew made an error in determining the polynomial equation of smallest degree whose roots are 3, 2+2i
KIM [24]

Answer:

Error of Andrew: Made incorrect factors from the roots

Step-by-step explanation:

Roots of the polynomial are: 3, 2 + 2i, 2 - 2i. According to the factor theorem, if a is a root of the polynomial P(x), then (x - a) is  a factor of P(x). According to this definition:

(x - 3) , (x - (2 + 2i)) , (x - (2 - 2i)) are factors of the required polynomial.

Simplifying the brackets, we get:

(x - 3), (x - 2 - 2i), (x - 2 + 2i) are factors of the required polynomial.

This is the step where Andrew made the error. The factors will always be of the form (x - a) , not (x + a). Andrew wrote the complex factors in form of (x + a)  which resulted in the wrong answer.

So, the polynomial would be:

(x - 3)(x - 2 - 2i)(x - 2+2i)=0\\\\ (x-3)(x^{2}-2x+2xi-2x+4-4i-2xi+4i-4i^{2})=0\\\\ (x-3)(x^{2}-4x+4+4)=0\\\\ (x-3)(x^{2}-4x+8)=0\\\\ x^{3}-4x^{2}+8x-3x^{2}+12x-24=0\\\\ x^{3}-7x^{2}+20x-24=0

7 0
3 years ago
Graph the line 2x – 3y = 12.
babunello [35]
Decided by 12 is 2 your welcome
8 0
2 years ago
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