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ioda
3 years ago
11

4) Se a = 7, b = -3 e c =2, a equação do 2º grau que corresponde a esses coeficientes é: 2x(x+1) + 5x² - 5x = - 2 2x² + 7x - 5 =

0 3x² -7 = 0 4(x² + 7) - 3x - 7 = 0 Nenhuma das alternativas acima.
Mathematics
1 answer:
maxonik [38]3 years ago
3 0

Answer:

hiduddseir rut the. rwi. ei ej ei rfcua di

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Which expression is equivalent to (10 + 7 r - r 2) + (-6 r 2 - 18 + 5 r )
rjkz [21]

Answer

-7r2+12r-8

Step-by-step explanation:

6 0
3 years ago
(2545.24 x 4242.06) + 2/100=
Vinvika [58]
Answer : <span>10797060.8144

</span>2545.24 x 4242.06 = <span>10797060.7944

</span>10797060.7944 + 2/100 = 10797060.8144
5 0
3 years ago
Brendan took a survey at school and found that 9 of the students surveyed planned to take dance as their next elective, while 63
ad-work [718]
Total amount of students=72
p(dance)=9/72
divide both numerator and denominator with 9
1/8
The experimental probability is 1/8
8 0
4 years ago
Read 2 more answers
Please Help!
Flura [38]
Let x be the length of the train.

On the basis of the observer;
Speed of the train = x/6

On the basis of the bridge;
Total distance covered by any point of the train= 350+x
Speed = (350+x)/20

Equating the two expressions of speed;
x/6 = (350+x)/20
20(x) = 6(350+x)
20x = 2100+6x
(20-6)x = 2100
14x = 2100
x= 2100/14 = 150 m
Speed = x/6 = (350+x)/20 = 150/6 = 500/20 = 25 m/s.

Therefore,
Length of train = 150 m
Speed of train = 25 m/s
8 0
4 years ago
My cousin needs help with this one. ⬆
mina [271]
If you are talking about "Write a number sentence that shows the sum of the 4 color of stars.

1/8 + 1/8 + 1/8 + 1/8 = 4/8, or 1/2


is your answer

for a number sentence, write out the whole thing with the equal sign and the answer

hope this helps
4 0
3 years ago
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