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2 years ago

Is y=-2x proportional

Mathematics

2 answers:

Fittoniya [83]2 years ago

8 0

Answer:

Step-by-step explanation:

romanna [79]2 years ago

8 0

Answer:

Yes, if you are referring to proportionality in general. No if you are referring to a direct proportionality.

Step-by-step explanation:

y = -2x is negatively proportional so it is not directly proportional because y or one quantity decreases when x or another quantity increases. In a directly proportional relationship, as one quantity increases another quantity must increase at the same rate, in other words both must increase thus be positive. When something is proportional it has a constant ratio, and relation.

Direct proportionality or variation is represented by y ∝ x, where ∝ is the symbol used to represent proportionality.

y = kx where k is the constant of proportionality.

Where k = y/x.

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JUUL Practice & Problem Solving 7.4.PS-10 Question Help Find the area of the polygon in square units. 4 2 e - 8 -6 - 4 - 2 4

V125BC [204]

area formula is

$A=\frac{1}{2}(b1+b2)h$

where:

b1 = small base

b2 = large base

h = height

then solve:

$A=\frac{1}{2}(2+6)3=\frac{1}{2}(8)3=\frac{24}{2}=12$

asnwer: 12 square units

7 0

1 year ago

Please explain every step

pogonyaev

<h3>Answer:</h3>

761680

<h3>Explanation:</h3>

$\sf \boxed{\sum _{n=1}^{44}\:60\left(1.2\right)^{n-2}}$

Identify the following's:

First Term [a] = 60(1.2)ⁿ⁻² = 60(1.2)¹⁻² = 50

Common ratio [r] = 1.2

Total Terms [n] = 44

===========================

$\sf Geometric \ Sum \ of \ Terms = \dfrac{a(r^n - 1)}{r-1}$

===========================

Solving Steps:

$\rightarrow \sf \dfrac{a(r^n - 1)}{r-1}$

$\rightarrow \sf \dfrac{50(1.2^{44} - 1)}{1.2-1}$

$\rightarrow \sf 761679.5808$

$\rightarrow \sf 761680 \ \ \ (rounded \ to \ nearest \ integer)$

8 0

2 years ago

An angle made with two radii whose vertex is at the center of a circle is the definition of what

Katena32 [7]

Answer: congruent central angles

Step-by-step explanation:

A central angle is an angle formed by two radii with the vertex at the center of the circle. In the diagram at the right, ∠AOB is a central angle with an intercepted minor arc from A to B. In a circle, or congruent circles, congruent central angles have congruent arcs.

4 0

3 years ago

Find an explicit formula for the arithmetic sequence -11, -3, 5, 13, ....

Alekssandra [29.7K]

Answer:

b(n) = -11 + (n-1)*8

Step-by-step explanation:

Let n be the sequence number, with n=1 the first number b(1) -11

The sequence changes by +8 each step.

b(1) -11 + 8 = -3

b(2) -3 + 8 = 5

b(3) 5 + 8 = 13

b(4) 13

b(1) = -11

b(2) = -3. or b(1) + 1*8

b(3) = 5, or b(1) + 2*8

b(4) = 13, or b(1) + 3*8

We note that each step adds a multiple of 8 to the initial value of -11. This can be stated as (n-1)*8

The formula for this sequence would be b(n) = b(1) + (n-1)*8

b(n) = -11 + (n-1)*8

Check: Does n=3 return the value of 5?

b(n) = -11 + (n-1)*8

b(3) = -11 + ((3)-1)*8

b(3) = -11 + (2)*8

b(3) = -11 + 16

b(3) = 5 YES

5 0

2 years ago

Please solve 6-12. Picture below.

allochka39001 [22]

The answer for this is 6

5 0

2 years ago

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