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lana [24]
3 years ago
15

What are the

Mathematics
1 answer:
mario62 [17]3 years ago
5 0

Answer:

x = 1+√83 i/6 and 1-√83 i/6

Step-by-step explanation:

Given the quadratic expression;

3x^2-x+7 =0

Using the general foemula to find x

x = -b±√b²-4ac/2a

From the equation

a = 3, b = -1 and c = 7

Substitute

x = -(-1)±√(1)²-4(3)(7)/2(3)

x = 1±√1-84/6

x = 1±√-83/6

x = 1±√83 i/6

x = 1+√83 i/6 and 1-√83 i/6

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A rectangle has an area of 175 m2 . Calculate its length if its width is 25m
iragen [17]

Answer:

The length of the rectangle  (L) = 7m

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given that the width of the rectangle = 25 m

Given that the area of the rectangle = 175 m²

Area of the rectangle = length × width

                175 =  L × 25

       length(L)  = \frac{175}{25}

                  L = 7 m

<u><em>Final answer:-</em></u>

The length of the rectangle  (L) = 7m

8 0
3 years ago
Somebody helpppp plzz
Romashka [77]

Answer:

2

Step-by-step explanation:

-2^2=4

4*1/2=2

7 0
3 years ago
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viktelen [127]

Answer:

A. 8/10

Step-by-step explanation:

(0.8 × 10) / (1 × 10) = 8/10  (since, multiplying 10 shifts the decimal point towards the right by one place)

Further, we can reduce fractions 8/10 by dividing the numerator and denominator by 2.

(8 ÷ 2) / (10 ÷ 2) = 4/5

Thus, 0.8 as a fraction is 8/10 or 4/5

5 0
3 years ago
Read 2 more answers
−1/3−(−1/2)=?<br> A)-1/6<br> B)0<br> C)1/6<br> D)1/2
ikadub [295]

Answer:

C) 1/6

Step-by-step explanation:

(-2/6) + (3/6) = 1/6

7 0
3 years ago
Let x denote the number of defective light bulbs in a randomly selected 20-count box from a local hardware store. The variable x
murzikaleks [220]

Step-by-step explanation:

First, find the expected value.

μ = 0 (0.28) + 1 (0.37) + 2 (0.22) + 3 (0.08) + 4 (0.05)

μ = 1.25

Now find the standard deviation.

σ² = (0−1.25)² (0.28) + (1−1.25)² (0.37) + (2−1.25)² (0.22) + (3−1.25)² (0.08) + (4−1.25)² (0.05)

σ² = 1.2075

σ = 1.099

If we were to select many boxes of bulbs randomly, the number of defective bulbs would typically vary about 1.099 from the mean.

5 0
3 years ago
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