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Alik [6]
2 years ago
9

Will Mark Brainliest

Mathematics
2 answers:
Elis [28]2 years ago
8 0

Answer:

<h2><u>D) x = -2 ±7<your answer</u></h2>

Step-by-step explanation:

Solve the quadratic equation by completing the square.

x^2 + 4x - 3 = 0

A) x = 4 ±7

B) x = 2 ±7

C) x = -4 ±7

<u>D) x = -2 ±7</u>

GaryK [48]2 years ago
5 0

The correct answer is D

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When I solved this equation I got x=0.5
qwelly [4]

You might have made an error the first time you solved for x. I got x = -0.5.

When you have your log base 4, the way you cancel that out is by making 4 the base on both sides, so you get 4^(log4) to reduce to 1, and you're left with:

2x + 3 = 4^(1/2) ... Simplify

2x + 3 = 2

2x = -1

x = -1/2

If you plug that back in, everything checks out. Maybe double check your use of logarithm/exponent properties?

4 0
3 years ago
At any point in time, there could be bicycles, tricycles, and
Aleksandr-060686 [28]

Answer:

There may be 1 or 3 tricycles in the parking lot.

Step-by-step explanation:

Since at any point in time, there could be bicycles, tricycles, and cars in the school parking lot, and today, there are 53 wheels in total, if there are 15 bicycles, tricycles, and cars in total, to determine how many tricycles could be in the parking lot, the following calculation must be performed:

13 x 4 + 1 x 3 + 1 x 2 = 57

11 x 4 + 1 x 3 + 3 x 2 = 53

10 x 4 + 3 x 3 + 2 x 2 = 53

8 x 4 + 5 x 3 + 2 x 2 = 51

10 x 2 + 1 x 3 + 4 x 4 = 39

9 x 3 + 1 x 2 + 5 x 4 = 49

Therefore, there may be 1 or 3 tricycles in the parking lot.

6 0
2 years ago
F. Evaluate each logarithm. <br> 1. y = log 2 64 2. y = log 11 121
masya89 [10]

Answer:

og 2 64 2. y = log 11 12

Step-by-step explanation:

wrysgygg

4 0
3 years ago
the sum of the interior angle in a polygon is 40,500° what is the number of sides in the regular polygon
larisa86 [58]

Answer:

227 sides

Step-by-step explanation:

The sum of the interior angles of a convex polygon is S=180(n-2) where n is the number of sides. If S=40500, then we have our equation 40500=180(n-2) and we can solve for n:

40500 = 180(n-2)

225 = n-2

227 = n

Therefore, the number of sides in the regular polygon is 227.

4 0
2 years ago
2. Use the graph of y=-X2 - 2x + 3 to solve
natita [175]

Answer:

Solution is x=-3 and x =1, because that is zero od function y=-x^2-2x+3

8 0
3 years ago
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