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photoshop1234 [79]
3 years ago
15

Using the correct number of significant figures?

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
3 0
For seven it would be 93.1, 3 sig figs and same for ten. It would be 2.78*10^3
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This is a true or false answer please help me**
Nitella [24]

Answer:

5False

6  true

7 true

Step-by-step explanation:

5 Complementary angles add to 90 degrees not 180 degrees

6  40+50 = 90 so they are complementary

7 Supplementary angles add to 180

   145+x = 180

Subtract 145 from each side

145-145 +x = 180-145

   x = 35

3 0
3 years ago
Find the solutions to the equation below 30x^2-28x+6 =0
Naddik [55]

For this case, we have the following equation of the second degree:

30x ^ 2-28x + 6 = 0

If we divide between 2 on both sides of the equation, we will have:

15x ^ 2-14x + 3 = 0

Where:

a = 15\\b = -14\\c = 3

The solutions will come from:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2 (a)}

Substituting:

x = \frac {- (- 14) \pm \sqrt {(- 14) ^ 2-4 (15) (3)}} {2 (15)}\\x = \frac {14 \pm \sqrt {196-180}} {30}\\x = \frac {14 \pm \sqrt {16}} {30}\\x = \frac {14 \pm4} {30}

So, we have:

x_ {1} = \frac{14 + 4} {30} = \frac {18} {30} = \frac {18} {30} = \frac {3} {5}\\x_ {2} = \frac {14-4} {30} = \frac {10} {30} = \frac {1} {3}\\

Answer:

x_ {1} = \frac {3} {5}\\x_ {2} = \frac {1} {3}

Option A

Option E

6 0
3 years ago
Read 2 more answers
A spinner is divided into three equal sections labeled a B and C. Erik spins the spinner and rolls a fair number cube. The tree
ale4655 [162]

Answer:

Last one:

The probability of the spinner not landing on A and rolling a prime number is 1/3

Step-by-step explanation:

The probability of the spinner not landing on A: 2/3

Prime outcomes on a dice:

2, 3, 5

The probability of rolling a prime number: 3/6 = 1/2

The probability of the spinner not landing on A and rolling a prime number is:

2/3 × 1/2

1/3

7 0
3 years ago
Read 2 more answers
Given: triangle LNK, m of angle NLK =72 degrees. m of angle N=58 degrees. MP is perpendicular bisector of side LK and intersects
sweet-ann [11.9K]

Answer:

  • 50°

Step-by-step explanation:

<u>Given triangle LNK </u>

  • m∠NLK = 72°
  • m∠LNK = 58°
  • m∠LKN = ?

<u>Interior angles sum to 180°</u>

  • m∠NLK + m∠LNK + m∠LKN = 180°
  • 72° + 58° + m∠LKN = 180°
  • m∠LKN = 180° - 130°
  • m∠LKN = 50°
4 0
3 years ago
What is the gcf for 28 and 70
Lena [83]
28 factors: 1,2,4,7,14,28
70 factors: 1,2,5,7,10,14,35,70
GCF : 14
8 0
3 years ago
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