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Naddik [55]
3 years ago
7

The length of a rectangle is 4 cm longer than the width, The perimeter is 80 cm. Find the length and the width. Substition Metho

d, Elimanation Method.
Mathematics
2 answers:
MrRa [10]3 years ago
6 0

Answer: Length = l

Width = w

2l + 2w = 80cm

l+w = 40cm

l = w+4

w+4 + w = 40cm

2w + 4 = 40cm

2w = 36cm

w = 18cm

l = 22cm

jd3sp4o0

Step-by-step explanation:

Juli2301 [7.4K]3 years ago
3 0

Answer:

L = 22, W= 18

Step-by-step explanation:

You can use an equation to solve this. Since the length is 4 more than the width, you can use L = W + 4. (L = Length, W = Width). I personally like to draw a diagram to figure out the total sides. We can add up all the sides, using our equations and adding common factors. We know the perimeter is 80 cm, so we can equal it to this. Solve for W. And finally subsitute for L.

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Find the slope of the line tangent to the graph of x²+2xy² +3y=31 at the point (2, -3)​
Serhud [2]

9514 1404 393

Answer:

  22/21

Step-by-step explanation:

Taking the derivative, we have ...

  2x·dx +2y²·dx +4xy·dy +3·dy = 0

  dx(2x +2y²) +dy(4xy+3) = 0

At the given point, this is ...

  dx(2·2 +2·(-3)²) +dy(4·2·(-3) +3) = 0

  22dx -21dy = 0

  dy/dx = 22/21

The slope of the tangent at the point of interest is 22/21.

3 0
3 years ago
Please help I’ll give you guys brainiest!<br><br><br> Thank youuuuuuu :))
mariarad [96]

Hi there!

\large\boxed{\left \{ {{y\geq -x + 3} \atop {y > 2x - 3}} \right.}

We can begin by looking at the solid-line pictured in the graph.

Using the slope-formula, we can derive the slope from this line:

\text{Slope } = \frac{ y_2 - y_1 } { x_2 - x_1 }

Plug in points from the line:

m = \frac{0- 3 } { 3 - 0} = -1

We can also see that the graph has a y-intercept, or "b" value of 3. The line is a solid line including values above it, which means we must use a "greater than or equal to" symbol. Therefore, the final equation is:

y ≥ -x + 3

The second line is dashed and also has values shaded above its graph. We can use this later to make an equation, but let's solve for the slope for now. Use the same equation as above:

m = \frac{1-(-3)}{2-0}  = 4/2 = 2

The graph has a y-intercept at y = -3, so this is the "b" value in its slope-intercept formula.

Use a "greater than" sign (Not equal to... the line is dashed) to write the equation:

y > 2x - 3

6 0
3 years ago
1: A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 122 golf balls to the bag. He wants the ra
fgiga [73]
Part A:

Given that a<span> bag contains 10 white golf balls and 6 striped golf balls, the ratio of white to striped golf balls is 10 : 6 = 5 : 3.

Given that </span>a<span> golfer wants to add 122 golf balls to the bag, the of balls each he should add is given by:

5\left( \frac{122}{5+3} \right) \ : \ 3\left( \frac{122}{5+3} \right)=5\left( \frac{122}{8} \right) \ : \ 3\left( \frac{122}{8} \right) \\  \\ =5(15.25) \ : \ 3(15.25)=76.25 \ : \ 45.75 \\  \\ \approx76:46

Therefore, the golfer shold add 76 white golf balls and 46 striped golf balls.



Part B.

You did not indicate the scale factor.

Assuming the scale factor is given by D(o, k) where k can be any number, then the cordinate of the </span><span>coordinates of the image of the quadrilateral VWXY are given by:

V'(6k, 2k), W(-2k, 4k), X(-3k, -2k), Y(3k,-5k)

That is you multiply the scale factor to the coordinates of the preimage to get the coordinates of the image.
</span>
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4 years ago
Use the ratio test to determine whether the series is convergent or divergent.
Kitty [74]

Answer:

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Step-by-step explanation:

Given series has general term as

\frac{2^n}{n^2}

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WE have to check whether this series converges or diverges

Let us use ratio test

Ratio of n+1 th term to nth term

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by dividing numerator and denominator by n square

Take limits as n tends to infinity

The ratio tends to 2

Since ratio >2, the series diverges

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3 years ago
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e-lub [12.9K]

Answer:

Ten times as 8 hundreds is 8 thousands.

Step-by-step explanation:

Ten times as 8 hundreds is 8 thousands.

This can be written mathematically as:

10 times as 800, is 8000.

or, we can multiply these to get the answer.

10\times800=8000

So, the answer is : Ten times as 8 hundreds is 8 thousands.

6 0
3 years ago
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