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Alexxandr [17]
3 years ago
8

Please help, i’m so confused ahhh

Mathematics
1 answer:
Over [174]3 years ago
3 0

Answer: x = 3. the length of side ST is 14.

Step-by-step explanation:

Since both sides are equal, we can use the equation 3x + 5 = 5x - 1.

To start the problem, we subtract 3x from each side which makes our equation 5 = 2x - 1.

The next step would be to simplify the equation by adding 1 to each side which makes our equation 6 = 2x.

We then need to simplify the equation to x = 3.

This means the answer to 9 is x = 3.

For the next problem, since we already know the value of x, we substitute its value which in this case would be 3. This leaves us with an equation of 9 + 5, which equals 14.

This means the length of side ST is 14.

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Answer:

106 m²

Step-by-step explanation:

we can see in the figure that it is made up of one square and one trapezium

Formula to calculate the area of this polygon

Area of square + Area of trapezium

Area of square

side²

5²

25

Area of trapezium

\frac{a+b}{2}(h)

<em>here a and b is the parallel sides</em>

<em>         h is the height of trapezium </em>

\frac{6+3}{2}(21-3)

\frac{6+3}{2}(18)

(6+3)(9)

(9)(9)

81

Area of the polygon

25 + 81

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6 0
3 years ago
Read 2 more answers
The weights of newborn elephants are normally distributed with a mean of 225 pounds and a standard deviation of 45 pounds. Find
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Answer:

0.63043

Step-by-step explanation:

Given that :

Mean = 225

Standard deviation = 45

P(x > 210) : (x - mean) / standard deviation

P(x > 210) = (210 - 225) / 45

P(x > 210) = - 0.333

P(Z > - 0.333) = 0.63043 (Z probability calculator)

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3 years ago
A certain television is advertised as a 53-inch TV (the diagonal length). If the width of
zhenek [66]

The TV is 45 inches tall.

Step-by-step explanation:

The diagonal length of television = 53 inches

Width of TV = 28 inches

As TV is in rectangular or square shape, a diagonal will form a right triangle

Where,

Diagonal = hypotenuse = c = 53 inches

Width = base = b = 28 inches

Length = perpendicular = a

we will use pythagorean theorem to find the length.

a^2+b^2=c^2\\a^2+(28)^2=(53)^2\\a^2+784=2809\\a^2=2809-784\\a^2=2025

Taking square root on both sides

\sqrt{a^2}=\sqrt{2025}\\a=45

The TV is 45 inches tall.

Keywords: triangle, square root

Learn more about square root at:

  • brainly.com/question/10772249
  • brainly.com/question/10781917

#LearnwithBrainly

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