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3 years ago

PLEASE HELP I WILL MARK YOU BRAINLIEST FIND THE AREA OF NUMBER 3 AND 4

Mathematics

2 answers:

scoray [572]3 years ago

8 0

Answer:

3. 112.2 yd

4. 30m

Step-by-step explanation:

Number 3:

L × W (length × width) = A
18.7 × 6 = 112.2 yd

Number 4:

B × H (base × height) = A
6 × 5 = 30 m

I hope this helps!

sdas [7]3 years ago

8 0

Answer:

3. The formula to find the area of a rectangle is l * w. 18.7 * 6 = 112.2 yards^2.

4. The formula to find the area of a parallelogram is base * height. 6*5 = 30 m^2.

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Translate the following <br> Half a number decrease by twelve

Ostrovityanka [42]

Hi!

So, to "half" a number, you multiply it by 1/2 or 0.5

"A number" is a number which we don't know the value of, so we could use a variable. Any letter you want is fine, but let's use x

"Decrease by 12" This simply means to subtract 12, so - 12

So, now we have:

1/2x - 12

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3 years ago

Please help i will gvie brainlest

Illusion [34]

Answer:

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Step-by-step explanation:

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3 years ago

Find:

emmasim [6.3K]

Answer:

Step-by-step explanation:

Given the dataset 147, 154, 156, 161, 162,

Mean is the sum of the dataset divided by the total number of dataset.

a) Mean = $\sum Xi/N$

$\overline x = \dfrac{147+154+156+161+162}{5}\\ \\\overline x = \dfrac{780}{5}\\ \\\overline x= 156$

b) The formula for calculating the deviation from the mean for each value is expressed as $Xi - \overline X$ where;

Xi is value of each item

xbar is the mean = 156

Mean deviation of 147 = 147-156 = -9

Mean deviation of 154 = 154-156 = -2

Mean deviation of 156 = 156-156 = 0

Mean deviation of 161 = 161-156 = 5

Mean deviation of 162 = 162-156 = 6

c) Sum of the deviations $\sum Xi - \overline X$ = (-9-2+0+5+6)

$\sum Xi - \overline X$ = -11+11

$\sum Xi - \overline X$ = 0

<em>Hence the sum of deviation from the mean is 0</em>

5 0

3 years ago

Write an equation in point-slope form of the line through point P(-4, 7) with slope -4.

IrinaVladis [17]

Answer:

y - 7 = -4(x + 4)

Step-by-step explanation:

You want to find the equation for a line that passes through the point (-4,7) and has a slope of -4.

First of all, remember what the equation of a line is:

y = mx+b

Where:

m is the slope, and

b is the y-intercept

To start, you know what m is; it's just the slope, which you said was -4. So you can right away fill in the equation for a line somewhat to read:

y=-4x+b.

Now, what about b, the y-intercept?

To find b, think about what your (x,y) point means:

(-4,7). When x of the line is -4, y of the line must be 7.

Because you said the line passes through this point, right?

Now, look at our line's equation so far: . b is what we want, the -4 is already set and x and y are just two "free variables" sitting there. We can plug anything we want in for x and y here, but we want the equation for the line that specfically passes through the the point (-4,7).

So, why not plug in for x the number -4 and for y the number 7? This will allow us to solve for b for the particular line that passes through the point you gave!.

(-4,7). y=mx+b or 7=-4 × -4+b, or solving for b: b=7-(-4)(-4). b=-9.

6 0

3 years ago

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two forces of magnitude 100n and 70n act on an object. the angle between the forces is 120 degrees. what is the resultant force?

Katen [24]

The resultant force would be 88.88 N at an angle of 43 degrees from the 100 N force.

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4 years ago