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3 years ago

Find tha perimeter of a square with area 400cm2?Please answer

Mathematics

2 answers:

Nikitich [7]3 years ago

8 0

80 cm is the perimeter of the square

AleksandrR [38]3 years ago

4 0

Answer:

Step-by-step explanation:

the formula for a squares area is $s^{2}$ = A

the area is 400 so to find a side all you need to do is find the square root of 400, and that is 20

Finally multiply 20 by 4 so find the perimeter

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The original price of a skateboard was reduced by $15. The new price is $49. If p = the skateboard's original price in dollars,

Jobisdone [24]

So p - $15 = $49 and to solve it subtract 15 from 49 and then you will get your answer

7 0

4 years ago

Read 2 more answers

20 points! will mark brainliest!

Anestetic [448]

Answer:

Height of Tower = 41.8901 ft

Base to Ground Wire = 94.0905 ft

Step-by-step explanation:

So you want to find the opposing side of the angle, as well as the distance from the base to where the wire is attached to the ground. You would need to use CAH to find the ground, and SOH to find the height. To find the height or opposite, take the Sine of 24°, 0.4067, and times it by your hypoteneuse 103 to get an exact height of 41.8901 ft. Next, use the Cosine of 24°, 0.9135, and times that by your hypoteneuse 103 to get 94.0905 ft.

Here are the equations:

sin(24)= $\frac{h}{103}$

cos(24)= $\frac{h}{103}$

3 0

3 years ago

Find the equation of a line passing through the point(-3,0) and (2,-3)

Svetradugi [14.3K]

Answer <u>(assuming the question allows it to be written in slope-intercept form)</u>:

$y = -\frac{3}{5} x-\frac{9}{5}$

Step-by-step explanation:

1) First, find the slope of the equation. Use the slope formula $m = \frac{y_2-y_1}{x_2-x_1}$ , substitute the given points' x and y values, and simplify:

$m = \frac{(-3)-(0)}{(2)-(-3)} \\m =\frac{-3-0}{2+3}\\m = -\frac{3}{5}$

Thus, the slope is $-\frac{3}{5}$ .

2) Now, use the point-slope formula $y-y_1 = m (x-x_1)$ and substitute real values for $m$ , $x_1$ , and $y_1$ .

Since $m$ represents the slope, substitute $-\frac{3}{5}$ in its place. Since $x_1$ and $y_1$ represent the x and y values of a point the line crosses, use the x and y values of any one of the given points to substitute into the formula. (Either one is fine. I chose (2,-3).) Then, isolate y to put it into slope-intercept form and find the answer:

$y-(-3) = -\frac{3}{5} (x-(2))\\y + 3 = -\frac{3}{5} x + \frac{6}{5} \\y = -\frac{3}{5} x - \frac{9}{5}$

5 0

3 years ago

Read 2 more answers

P(×)= x(2x + 1)- 6x-3 <br>Factorize p(×)

kherson [118]

Step-by-step explanation:

P(X)=2x²-5x-3 is in the form ax²+bx+c

Using quadratic equation

x={-b±√(b²-4ac)}/2a

x=3,-1/2

4 0

3 years ago

When Adrian runs the 400 meter dash, his finishing times are normally distributed with a mean of 77 seconds and a standard devia

iragen [17]

Answer:

0.749

Step-by-step explanation:

We start by calculating the z-score

Mathematically:

z-score = (x-mean)/SD

z-score = (75-77)/3 = -2/3 = -0.67

The probability we want to calculate is;

P( X > -0.67)

we can use the standard normal distribution table for this

Using this table, the probability has a value 0.74857 which is 0.749 to the nearest thousandth

4 0

3 years ago

Find tha perimeter of a square with area 400cm2?Please answer​

Find tha perimeter of a square with area 400cm2?Please answer