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3 years ago

Find the Value of x. Please help. I will give you 69 points

Mathematics

2 answers:

natali 33 [55]3 years ago

8 0

30°, 120°, 55°, 36°,65°

klio [65]3 years ago

8 0

Answer:

65°, 120°, 55°, 30°, 36°

Step-by-step explanation:

2x + 50° = 180°
2x = 130°
x = 65°

x is the sum of supplementary angles of 125° and 115°

x = 180° - 125° + 180° - 115° = 55° + 65° = 120°

x = 25° + (45° - 15°) = 25° + 30° = 55°

(180° - 60°) - 3x = 90° - 2x
120° - 90° = 3x - 2x
x = 30°

2x + 3x = 180°
5x = 180°
x = 36°

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he numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance

Naddik [55]

Answer:

Range = 13

Mean = 8.4

Variance= 21.24

Standard deviation= 4.61

Step-by-step explanation:

2, 10, 15, 3, 13, 9, 14, 7, 2, 9

For the range

Let the set of data be arranged inn ascending order

Range= higehest value- lowest value

Range = 15-2

Range= 13

For the mean

Mean = (2+2+3+7+9+9+10+13+14+15)/10

Mean = 84/10

Mean = 8.4

For variance

Variance=((2-8.4)²+(2-8.4)²+(3-8.4)²+(7-8.4)²+(9-8.4)²+(9-8.4)²+(10-8.4)²+(13-8.4)²+(14-8.4)²+(15-8.4)²)/10

Variance= (40.96+40.96+29.16+1.96+0.36+0.36+2.56+21.16+31.36+43.56)/10

Variance= 212.4/10

Variance= 21.24

Standard deviation= √variance

Standard deviation= √21.24

Standard deviation= 4.609

Approximately = 4.61

6 0

3 years ago

Helma wants to find the volume of the right rectangular prism shown below. Which equation could Helma use to find V, the volume

sleet_krkn [62]

V = 30*16*12. To find the volume of a rectangular prism, you just multiply the area of the base (side 1 * side 2) by the height of the prism.

5 0

3 years ago

Joe answered 18 questions correct on his science test the test had 45 questions what percent did joe answer correctly.

SCORPION-xisa [38]

Answer:

obly 4% right

Step-by-step explanation:

4 0

3 years ago

Two percent of Jennie’s skin cells were burned when she escaped from a fire. If 3.7×10^10 of her skin cells were burned then, ho

gulaghasi [49]

$1813\times10^9$ cells were not burnt when Jennie escaped from the fire.

<u>Solution:</u>

Given:

2% of skin cells were burnt i.e, $3.7\times10^{10}$ of skin cells were burnt.

To find:

Number of skin cells that were not burnt

We can write $3.7\times10^{10} \text{ as } 37\times10^{9}$

Therefore, by equating the values we get,

2% of the cell is $37\times10^9$

1% of the cell is $\frac{37\times10^9}{3}=18.5\times10^9$

As, 1% of the cell is $18.5\times10^9$

98% of the cell will be $98\times18.5\times10^9=1813\times10^9$

$\therefore \text{ skin cells that are not burnt is } 1813\times10^9$

8 0

3 years ago

-3(x+8)-12=62-24 solve

Juli2301 [7.4K]

Answer:

First we chose one side to solve.

I am doing the one on the left first.

so -3x+-24-12

-3x-12

Now we do the other side

62-24 is

38 therefore

-3x-12=38

4 0

3 years ago