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3 years ago

Which of the following gives all of the sets that contain -1/2?

Mathematics

2 answers:

Natalka [10]3 years ago

7 0

Answer:

B the set of all natural numbers and the ser of all

sammy [17]3 years ago

7 0

Answer:

B D B C

Step-by-step explanation:

rational numbers, real numbers

irrational

rational

a. Z, Q, R b. Q, R c. N, Z, Q, R d. R

= 0.375, nonrepeating, terminating; 5

0.83, repeating, nonterminating; 12

15 = 0.8,

nonrepeating, terminating; 7

11 = 0.63,

repeating, nonterminating

real, irrational; real, rational, whole

Answers may vary. Sample: − 50

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Which notation is expressed in interval notation x> -2?

vfiekz [6]

Answer:

$( - 2 \: \infty )$

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3 years ago

Solve the systems by the addition method 2x + y = - 1x - 2y = - 4

inna [77]

Answer:

x = -6/5

y =7/5

Step-by-step explanation:

2x + y = - 1

x - 2y = - 4

Multiply the first equation by 2 so we can eliminate y

2(2x + y = - 1)

4x + 2y = -2

Add this to the second equation

4x + 2y = -2

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5x + 0y = -6

Divide by 5

5x/5 = -6/5

x = -6/5

Multiply the second equation by -2 so we can eliminate x

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---------------------

0x + 5y = 7

Divide by 5

5y/5 = 7/5

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6 0

3 years ago

The standard formula for the volume of a cylinder is V = πr2h. If the cylinder is scaled proportionally by a factor of k, its vo

Lelechka [254]

So, r' (the new r) becomes kr, and h'=h*k,

so V' = pi * (r')^2*h' = pi * (r*k)^2*(h*k) = pi*r^2*h*k^3 = V * k^3

Convinced?

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3 years ago

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PLEASE HELPPPPP ME PLEASE I DONT KNOW WHAT TO DO ☹️#7

nirvana33 [79]

Given:

The function is:

$f(x)=-2x+5$

To find:

The inverse of the given function, then draw the graphs of function and its inverse.

Solution:

We have,

$f(x)=-2x+5$

Step 1: Substitute $f(x)=y$ .

$y=-2x+5$

Step 2: Interchange x and y.

$x=-2y+5$

Step 3: Isolate variable y.

$2y=5-x$

$y=\dfrac{5-x}{2}$

Step 4: Substitute $y=g(x)$ .

$g(x)=\dfrac{5-x}{2}$

Hence, the inverse of the given function is $g(x)=\dfrac{5-x}{2}$ and the graphs of these functions are shown below.

8 0

3 years ago

if each dimension of a unit cube is increased by 1. what is the ratio between the surface area of the new cube to that of the or

nexus9112 [7]

Answer:

4:1 or 4/1

Step-by-step explanation:

Original surface area: Each side is 1 * 1 = 1 and there are 6 sides, so 1 * 6 = 6.

New surface area: Each side is 2*2 = 4, and there are 6 sides, so 4 * 6 = 24

The ratio would be 24:6, or 4:1. As a fraction, this would be 4/1

4 0

3 years ago

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