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guapka [62]
3 years ago
15

Please Help! If (3x+5)^2=ax^2+bx+c, what is the value of a+b+c?

Mathematics
1 answer:
Alisiya [41]3 years ago
4 0

Answer:

64

Step-by-step explanation:

You open up the (3x+5)^2 and get:

9x^2 + 30x + 25

So...

a+b+c = 64

OR

You add the coefficient(s) and the constant together in the parentheses and get:

(3x+5)^2 --> (8)^2

So you square the 8 and get:

64

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Hi can someone please complete the square step by step. thanks x² + 8x + 1 = 0
mario62 [17]

Answer:

x = -1/9

Step-by-step explanation:

first let's think of x as 1x so than x^2 is basically 1x.

you bring down 8x + 1 = 0 so you have x + 8x + 1 = 0.

than you add x and 8x which equals 9x.

you bring the problem down one more time so 9x + 1 = 0.

you subtract 1 from each side so the 0 becomes because 0 - 1 is -1.

So than you bring the rest of the problem down 9x = -1

Last thing you do is divide 9 from both sides which x = -1/9.

4 0
3 years ago
What is the value of x? Enter your answer in the box. x =
nikdorinn [45]

Answer:

x=\boxed{20}

Step-by-step explanation:

The vertical angles have the same measure, so ...

  3x +50 = 6x -10

  60 = 3x . . . . . add 10-3x

  20 = x . . . . . . divide by 3

3 0
4 years ago
Alonzo spent all but a quarter of his weekly allowance at the comic book store. To earn more money, he sells a few old comic boo
cricket20 [7]

Answer:

$4.75

Step-by-step explanation:

11-(6+0.25)

11-6.25=4.75

6 0
3 years ago
Please help I don’t understand it’s like angles and stuff picture above.
dusya [7]

Answer:

1) 145°

2) 20°

3) x = 7 ; measurement of the missing angle = 24

Step-by-step explanation:

1) supplement = 180°, 180 - 35 = 145

2) complment = 90° , 90 - 70 = 20

3) the figure is a right angle so the measurement is 90°

66 + (4x-4) = 90

62 + 4x = 90

4x = 28

x = 7

4(7) - 4

28 - 4

= 24

3 0
3 years ago
Read 2 more answers
I NEED HELP
Nana76 [90]
A. 125 is the answer to your question
5 0
3 years ago
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