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3 years ago

Use the discriminant to determine how many real number solutions exist for the quadratic equations -4j+3j-28=0

1 answer:

8 0

<span>the correct equation is
- 4j² + 3j - 28 =0

ax² + bx + c,
a = -4, b=3 c =- 28.
The discriminent D = b² - 4.a.cD = 3² - 4(-4)(-28)D = -439
If D ≥ 0 there are either 2 roots or one double if = 0)if D< 0, there are no real roots (but 2 imaginary roots)Since D < 0, then there is no real roots
The answer there is no real roots</span>

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Before a race, Evelyn ran 27 minutes to warm up. The race took her 2 hours.

Gwar [14]

Answer:

C. 147 minutes

Step-by-step explanation:

This is 147 minutes because 2 hours equal up to 120 minutes, before that Evelyn ran 27 minutes. So, now you have to add 120 and 27. You get 147.

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2 years ago

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Locate the point on the line segment between A(3,-5) and B(13,-15) given that the point is 4/5 of the way from A to B. Show your

Dominik [7]

Answer:

[11,-13]

Step-by-step explanation:

Let P be the point between A(3,-5) and B(13,-15) where segment AP = $\frac{4}{5}$ th of segment AB.

Therefore, point P divides the line AB in a 4 : 1 ratio internally.

Hence, the coordinates of point P will be $[\frac{4\times 13+ 1 \times 3}{4+1} , \frac{4(-15)+ 1(-5)}{4+1} ]$

= [11,-13] (Answer)

We know that If A $(x_{1}, y_{1} )$ and B $(x_{2}, y_{2} )$ are two different point and point P(h,k) divides line AB in the ratio m : n internally, then

(h,k) ≡ $(\frac{mx_{2}+ n x_{1}}{m+n} , \frac{my_{2}+ny_{1}}{m+n} )$

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3 years ago

Can someone please answer this multiple choice questions numbers 2 , 12 and 13 please answer and please please show work

Vinil7 [7]

Answer:

2) D

12) C

13) D

Step-by-step explanation:

2) 4° C at 6:00 PM

A) + 2° - 6° = - 4° 4° - 4° = 0° 0° does not equal 4° A $\neq$ Correct

B) - 5° + 1° = - 4° 4° - 4° = 0° 0° does not equal 4° B $\neq$ Correct

C) + 6° - 4° = + 2° 4° + 2° = 6° 0° does not equal 4° C $\neq$ Correct

D) - 7° + 7° = 0° 4° + 0° = 4° 4° does equal 4° D = Correct

The answer to question #2 is D

12) M = -3

N ----> M = 8.5 units

The only possible options for N are:

-3 + 8.5 = 5.5

-3 - 8.5 = -11.5

-11.5 is not a choice, so the answer to question #12 is C

13) Scale: 1 inch = 70 yards

Abe walks 3.5 inches (on the diagram)

Multiply both sides of the scale by 3.5

3.5 * 1 inch = 70 * 3.5

3.5 inches = 245 yards

Abe walked 245 yards

The answer to question #13 is D

Hope this helps :)

8 0

2 years ago