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Vika [28.1K]
3 years ago
9

Solve x2 – 18x + 81 = 4 by completing the square. Select any solutions that apply.

Mathematics
1 answer:
Masteriza [31]3 years ago
3 0

Answer:

7 and 11

Step-by-step explanation:

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Which of the pairs of angles are vertical angles and thus congruent? ∠A and ∠G ∠A and ∠B ∠C and ∠F ∠D and ∠H
r-ruslan [8.4K]

Answer:

∠A and ∠G is the pair of vertical angles.

Step-by-step explanation:

From the figure attached,

Two lines 'm' and 'n' are two parallel lines. These lines intersect a horizontal line 'l'.

Since, "Pair of opposite angles formed at the point of intersection are the vertical angles and equal in measure."

Therefore, Opposite angles ∠A ≅ ∠G, ∠B ≅ ∠H, ∠C ≅ ∠E and ∠D ∠F are the vertical angles.

From the given options,

∠A and ∠G is the pair representing the pair of vertical angles and thus congruent.

5 0
3 years ago
Read 2 more answers
How do you solve this? Show work and answer
Naddik [55]

Let's solve your equation step-by-step.

2b+1=16−3b

Step 1: Simplify both sides of the equation.

2b+1=16−3b

2b+1=16+−3b

2b+1=−3b+16

Step 2: Add 3b to both sides.

2b+1+3b=−3b+16+3b

5b+1=16

Step 3: Subtract 1 from both sides.

5b+1−1=16−1

5b=15

Step 4: Divide both sides by 5.

5b/5=15/5

<em>answer: b=3</em>

6 0
3 years ago
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Tell whether the graph of the Quadratic function y=-3x squared +x+1 opens upward or downward
8_murik_8 [283]

Answer:

down

Step-by-step explanation:

y = -3x^2 +x +1

The coefficient of the x^2 term is negative so it opens facing down

X^2 coeffient

- means down

+ mean up

8 0
3 years ago
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Fencing costs $25.80 per yard. How much does it cost to enclose two adjacent rectangular pastures as shown x=50 5/8 y=30 2/9
Maslowich

Answer:

54.65

Step-by-step explanation:

5 0
3 years ago
Explain how to subtract 247 from 538
Vladimir79 [104]
8-7=1 3-4=1 5-2=3  So it is 311.
4 0
3 years ago
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