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Vaselesa [24]
3 years ago
8

To make a friendship bracelet, some long strings are lined up then taking one string and tying it in a knot with each of the oth

er strings to creat a row of knots. A new string is chosen and knotted with the all the other strings to create a second row. this process is repeated until there are enough rolls to make a bracelet to fit around your friends wrist. Are the number of knots proportional to the number of rows?
Mathematics
2 answers:
sattari [20]3 years ago
3 0

Answer:

sorry i would help u but it doesn't show any of the numbers

Step-by-step explanation:

Nina [5.8K]3 years ago
3 0

there are no numbers to answer this
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Given the parametric equations x = 7cos θ and y = 5sin θ, which of the following represents the curve and its orientation?
nikitadnepr [17]

We have the following parameters

\begin{gathered} x=7cos\theta \\ y=5sin\theta \end{gathered}

the general equation of a circle with center (0,0) is the following,

x^2+y^2=r^2

Let's use the following tigonometric identity,

sin^2\theta+cos^2\theta=1

solving for cos and sin in the equations we are given,

cos\theta=\frac{x}{7},sin\theta=\frac{y}{5}

replace,

(\frac{y}{5})^2+(\frac{x}{7})^2=1

Since we have two different numbers in the denominator, this is not a circle equation but an elipse, of the form,

\frac{y^2}{a^2}+\frac{x^2}{b^2}=1

where,

a is the vertex and,

b is the covertex

thus, in the x axis, the vertex is 7 and the y-axis the covertex is 5

Now, let's determine the direction by replacing

when Θ = 0 , then x = 7*cos0 = 7*1 = 7 , and y = 5*sin0 = 5*0 = 0

when Θ = 90° or π/2 , then x = 7*cos90° = 7*0 = 0 , and y = 5sin90° = 5*1 = 5

If we draw this, we can see that the direction is counterclockwise as in the bottom right image.

6 0
1 year ago
Mary, who is sixteen years old, is four times as old as her brother. how old will mary be when she is twice as old as her brothe
SVEN [57.7K]
Hope this answer is helpful and correct.

5 0
3 years ago
Factor <br> 50t^2-20t-30=??
topjm [15]

The answer is 10(t-1) (5t+3).

An algebraic equation of the second degree in x is a quadratic equation. Typically, a quadratic equation is expressed in standard form as,ax^2 + bx + c = 0.

And the factor is a number or algebraic expression that divides another number evenly without leaving any remainder.

To factor the given quadratic equation, first, take the common factor of the equation. Therefore,

50t^2-20t-30=10(5t^2-2t-3)

Using the sum-product pattern, we can write 2t as 3t-5t. Therefore,

50t^2-20t-30=10(5t^2+3t-5t-3)

Now, find the common factor between the pairs within the bracket. We get,

50t^2-20t-30=10(t(5t+3)-1(5t+3))

Finally, rewriting the above terms by factoring out the greatest common factor, we get,

50t^2-20t-30=10(t-1)(5t+3)

To know more about factoring quadratic equations:

brainly.com/question/1863222

7 0
1 year ago
Read 2 more answers
Which expression is equivalent 7x +49
fenix001 [56]

For x = 4

7 x 4 + 49 = 77

Answer Is 77

8 0
3 years ago
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A set of notations (SSS, SAS, ASA and RHS) is used to describe/prove that two triangles are conjurent. For each pair of triangle
lana66690 [7]

Answer:

The answer is given below

Step-by-step explanation:

The statements are not given but from this definition, you should be able to select the correct statement.

Triangles are said to be congruent if they have the same size and shape. A triangle is made up of six (three sides and three angles) but only three is usually needed to prove triangle congruence. These are:

a) Side - Side - Side (SSS): Two triangles are congruent if the length of their three sides are equal to each other.

b) Side- angle- side (SAS): If two sides and one angle of a triangle is equal to two sides and a angle of another triangle then the two triangles are congruent to each other.

c) Angle - side - angle (ASA): If two angles and a side of a triangle are equal to a corresponding two angles and a side of another triangle then the two triangles are congruenr.

d) Right angle - hypotenuse - side (RHS): If for two right angled triangles, their hypotenuse and a side (leg) are equal, then the two triangles are congruent.

4 0
3 years ago
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