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wariber [46]
3 years ago
9

Solve 3x^2-x=10 A:x=2 and x=-15 B:x=-5 and x=2/3 C:x=-5/3 and x=2 D:x=-3 and x=10

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
8 0

Answer:

C

Step-by-step explanation:

∆=b^2-4a*c=1-4*3*(-10)=121>0 có 2x

x1=-b+sprt∆/2a=1+sprt121/2*3=2

x2=-b-sprt∆/2a=1-sprt121/2*3=-5/3

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4 3/6 x 5 4/8= <br><br> thank uuuu
Marysya12 [62]

Answer:

ok first we can simplyfy 4 3/6 to 4 1/2 and 5 4/8 to 5 1/2 so

4 1/2* 5 1/2

now we need to convert into improper fractions so

9/2*11/2=99/4 then we need to simplfy

24 3/4

Hope This Helps!!!

7 0
2 years ago
La familia Quispe para mejorar su casa que está deteriorada por los inclemencias de la naturaleza Busca financiar un préstamo de
antoniya [11.8K]
A = año
1. El emprendedor - $4000 + A($800) esto es porque el 20% de 400 serían 800.
2. Tú apoyo - $4000 + 3($200) esto es porque el 5% de 4000 es 200, y pagarías 200 más cada tres meses.
1. En un año pagarían —> $4800 ya que 4000 mas 800 es 4800.
2. En un año pagarían —> $4800 ya que 4000 mas 200, 4 veces, para llegar al año son 4800
La respuesta sería que las dos entidades serían el mismo costo.
Ojalá y esto sirvió de ayuda.
7 0
3 years ago
Rewrite the equation by completing the square. 4 x^{2} +20x +25 =0
Ede4ka [16]

Answer:

(x+5/2)^2 = 0

Step-by-step explanation:

4 x^{2} +20x +25 =0

Divide by 4

4/4 x^{2} +20/4x +25/4 =0

x^2 +5x +25/4 =0

Subtract 25/4 from each side

x^2 +5x +25/4 -25/4 =-25/4

x^2 +5x  =-25/4

Take the coefficent of x

5

Divide by 2

5/2

Square it

25/4

Add it to each side

x^2 +5x +25/4 =-25/4+25/4

(x+5/2)^2 = 0

Take the square root of each side

x+5/2 = 0

x = -5/2

8 0
3 years ago
Read 2 more answers
Mrs. Yin bought 0.81 of a pound of turkey and 0.69 of a pound of chicken. Did Mrs. Yin buy more turkey or more chicken? Show how
S_A_V [24]
Mrs. Yin bought more turkey than chicken. I know because 0.80 is greater than 0.69
5 0
3 years ago
Wazi has sixty three 5 $ bills he takes the 5 $ bills to bank to exchange for 20$ how many 20$ bills does Wes I get
dmitriy555 [2]
15

63 x 5 = 315
315/20 = 15.75
hence, 15 $20 bills
4 0
4 years ago
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