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IrinaVladis [17]
3 years ago
6

Solve the quadratic equation by completing the square x²+12x+26=0

Mathematics
1 answer:
vova2212 [387]3 years ago
4 0

Answer:

x={-13,-2}

Step-by-step explanation:

(x+13)(x+2)=0

x+13=0

x=-13

x+2=0

x=-2

x={-13,-2}

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What is the value of x?
soldi70 [24.7K]

Answer:

5\sqrt{3}

Step-by-step explanation:

A triangle with angles of 30-60-90 will always have sides that measure in the following proportions:

The side opposite the 30* angle = a

The side opposite the 60* angle = a\sqrt{3}

The side opposite the 90* angle = 2a

(I used "a" here because your question uses "x" and I don't want to confuse things, but usually people use "x" rather than "a")

They gave us that the hypotenuse (the side opposite the 90* angle) is 10, from there we can figure out the other sides:

Since the side opposite 90* is 2a, and 2a = 10, divide 10 by 2 and you get a = 5.

Once we know what "a" is, we can fill in the rest:

30* = 5

60* = 5\sqrt{3}

90* = 10

3 0
3 years ago
When Josh babysits, he chargers a flat fee of $14 plus an hourly rate of $9. How long would Josh need to babysit if he wants to
SpyIntel [72]

Answer:

\frac{36}{7}hours

Step-by-step explanation:

First let's get the flat fee of 14 out of the way, because he wants to earn 86 dollars and the 14 dollar fee is the y intercept.

86-14 = 72

We would then divide 72 by the slope (14 per hour) to see how many hours he has to work:

72/14 \approx5.14285714286

I would just simplify because this decimal isn't exact

72/14 = 36/7

So 36/7 hours

7 0
3 years ago
Simplify 2x-(-3x+9). 5x-9 –x-9 x+9
vampirchik [111]

Answer:

5x - 9

Step-by-step explanation:

2x -(-3x + 9)                

2x + 3x - 9)                  DISTRIBUTE -1

5x - 9                           COMBINE LIKE TERMS

8 0
3 years ago
Factor completely 3x2 − x + 5.
krok68 [10]

Answer:

does not factor

Step-by-step explanation:

prime

8 0
3 years ago
1. The ratio of the number of boys to the number of girls on the swim team
Papessa [141]

Answer:

8

Step-by-step explanation:

Sum the parts of the ratio 4 + 2 = 6 parts

Divide 24 by 6 to find the value of one part of the ratio

24 ÷ 6 = 4 ← value of 1 part, thus

number of boys = 4 × 4 = 16

number of girls = 2 × 4 = 8

Hence there are 8 more boys than girls

5 0
4 years ago
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