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Natali5045456 [20]
4 years ago
14

The first three steps of completing the square to solve the quadratic equation x^2+8x+5=0

Mathematics
1 answer:
defon4 years ago
7 0
Subtract 5 from both sides
X^2 +8x =-5


2. 8/2=4

3. 4^2=16

Add 16 to both sides

X^2+8x+16=-5+16
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Solve the system by substitution 3x+y=-16 and y=-x-4
kap26 [50]

Solution,

y = -x-4......(i)

3x + y =- 16.......(ii)

Now,

Substituting the value of y in equation (ii)

or, 3x + (-x-4)= -16

or,3x - x - 4 = -16

or, 2x= -16 +4

or, x = -12/2

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Then,

Substituting the value of x in (i) equation;

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3 years ago
10 1/4 x 3 3/5 what is the answer?
Harlamova29_29 [7]

Answer:

369/10

Step-by-step explanation:

10 1/4=41/4

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8 0
3 years ago
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Wendy's hair was 45 cm long. She got 19% cut off. How long is her hair now?
Ira Lisetskai [31]

Answer:

36.45 cm

Step-by-step explanation:

You can automatically assume that if it was 20% cut off, Wendy's hair would've been 36 cm.  Multiply 45 by 0.19 to get 8.55 since that is how much Wendy's hair is being cut off.  Subtract that number from 45 to get your final answer which is 36.45 cm.

5 0
3 years ago
Which polynomial function has a leading coefficient of 1 and roots /7 and - /3 with multiplicity 1?
VladimirAG [237]

Answer:

  • A.  f(x) = (x - √2)(x + √3)

Step-by-step explanation:

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<u>The function with the roots of a and b is:</u>

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<u>Substitute and and b:</u>

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Correct choice is A

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3 years ago
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Question 1 of 10
ki77a [65]

Answer:

Acute and scalene

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All the three interior angles of triangle are less than 90 then it is an acute triangle.

All the sides have different length then it is Scalene triangle. In Scalene triangle, all the sides have different length and so all the angles are of different

8 0
3 years ago
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