I need to know what is rational and what isn't ​

Answer:

look on khan academy

Step-by-step explanation:

Answer:

-2; 1; 4; 7

Step-by-step explanation:

To solve for y, plug the x value in to the expression

y = 3(-1) + 1

y = -3 + 1

y = -2

When x = -1, y = -2

y = 3(0) + 1

y = 0 + 1

y = 1

When x = 0, y = 1

y = 3(1) + 1

y = 3 + 1

y = 4

When x = 1, y = 4

y = 3(2) + 1

y = 6 + 1

y = 7

When x = 2, y = 7

Answer:

f= -14/3

Step-by-step explanation:

-f-6-2f=8

(given)

-3f-6=8

(combine like terms)

-3f=14

(add 6 to both sides)

f= -14/3

Answer:

Growth rate of plants compared to average daily temperature.

Step-by-step explanation:

Answer:

the answer is #3

Step-by-step explanation:

the expression that represents C, the total cost of her ride, in terms of m, the length of the trip in miles is C = 5 + 0.25m.

The term "operation" in mathematics refers to the process of computing a value utilizing operands and a math operator. For the specified operands or integers, the math operator's symbol has predetermined rules that must be followed. In mathematics, there are five basic operations: addition, subtraction, multiplication, division, and modular forms.

Given this, Maria took a taxicab from her home to the theater downtown. The taxicab company charges a flat fee of $5.00 plus $0.25 per mile.

Since, C represents the total cost of her ride, in terms of m, the length of the trip in miles.

So,

Total cost = fixed cost + variable cost

In our case

Fixed cost = 5

and the variable cost = 0.25 per mile

For m miles variable cost = 0.25*m

Thus,

Total cost = 5 + 0.25*m

C = 5 + 0.25m

therefore, the expression that represents C, the total cost of her ride, in terms of m, the length of the trip in miles is C = 5 + 0.25m.

Learn more about Mathematical operations here:

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Answer:

180 customers

Step-by-step explanation:

72/100 × x/250

cross multiply

72 × 250 = 100 × x

18000 = 100x

divide both sides by 100

180 = x

Answer:

180

Step-by-step explanation:

72% of 250 is 180 :)

Answer:

28

Step-by-step explanation:

you find the length of the side of one cube by using the equation they gave you, so 343^(1/3) would be 7. they're are 4 cubes lined up, so you multiply 7 by 4 to get 28.

Answer:

Johnny Test

Step-by-step explanation:

Answer:

9.6 cm

Step-by-step explanation:

Since the shapes are similar, we can write a proportion. Let x be the length of MN.

9/12 = 7.2/x Write a proportion.

9x = 12(7.2) Use cross products.

9x = 86.4 Multiply.

x = 9.6 Divide both sides by 9.

Side MN is 9.6 cm.

Answer:

-22

Step-by-step explanation:

f(x) = -2x^2 - 4 for x = 3

f(3) = -2(3)^2 - 4

f(3) = -2(9) - 4

f(3) = -18 - 4

f(3) = -22

Answer: -22

Answer:

-22

Step-by-step explanation:

Answer:

1.010101e+12

Step-by-step explanation:

28282828282838.28282828282839 / 28

Answer:

The answer to the question is 26.

Answer:

-6

Step-by-step explanation:

Answer:

-6

Step-by-step explanation:

did the test

Answer:

The mean for the probability mass function is 0.64287.

Step-by-step explanation:

The complete question is:

In a batch of ​28 pedometers, 3 are believed to be defective. A​ quality-control engineer randomly selects 6 units to test. Let random variable X = the number of defective units that are among the units tested.

The probability mass function ​f (x) is:

f (x)​ = {(0, 0.47009​), ​(1, 0.42308​), ​(2,​ 0.10073), ​(3, 0.00611​)}

Solution:

The mean of a discrete random variable X with probability mass function f (x) is:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

Compute the mean for the probability mass function above as follows:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

  [tex]=(0\times 0.47009)+(1\times 0.42308)+(2\times 0.10073)+(3\times 0.00611)\\=0+0.42308+0.20146+0.01833\\=0.64287[/tex]

Thus, the mean for the probability mass function is 0.64287.

This values represents the expected number of defective units for every 6 units tested.

Answer:

90.

Step-by-step explanation:

If the number of girls = x then the number of boys = x+60 and the total is 2x + 60.

As the ratio of boys to girls = 5:1, the fraction of boys = 5/6 and of girls is 1/6.  

So x = 1/6(2x + 60)

x = 1/3x + 10

2/3 x = 10

x = 10*3/2 = 15.

So the total number of people = 2(15) + 60 = 90.

Answer:

I) Eq(1) reason: sum of segments of a straight line

II) Eq(2) reason: Given PQ = ST & PS = RT

III) Eq(3) reason: sum of segments of a straight line

IV) Eq(4) reason: Same value on right hand sides of eq(2) and eq(3) demands that we must equate their respective left hand sides

V) Eq(5) reason: Usage of collection of like terms and subtraction provided this equation.

Step-by-step explanation:

We are given that;

PS = RT and that PQ = ST

Now, we want to prove that QS = RS.

From the diagram, we can see that from concept of sum of segments of a straight line we can deduce that;

PQ + QS = PS - - - - (eq 1)

Now, from earlier we saw that PQ = ST & PS = RT

Thus putting ST for PQ & PS for RT in eq 1,we have;

ST + QS = RT - - - - (eq 2)

Again, from the line diagram, we can see that from concept of sum of segments of a straight line we can deduce that;

RS + ST = RT - - - - -(eq 3)

From eq(2) & eq(3) we can see that both left hand sides is equal to RT.

Thus, we can equate both left hand sides with each other to give;

ST + QS = RS + ST - - - (eq 4)

Subtracting ST from both sides gives;

ST - ST + QS = RS + ST - ST

This gives;

QS = RS - - - - (eq 5)

Thus;

QS = RS

Proved

Answer:

$4.90

Step-by-step explanation:

17.15 / 7= 2.45

2.45*2=4.9

the cost of another two pains of glass is $4.90

Answer:

Grain of sand estimate= 4.6 × 10-3

Dust particle estimate: 5 × 10-5

92 times greater

Step-by-step explanation:

Answer:

diameter of grain is 92 times greater than the diameter of dust particle

Answer:

D. Dilation and reflection

Step-by-step explanation:

There are 4 main types of transformations, rotation, reflection, translation, and dilation. 3 of these transformations are defined as rigid, rigid means that the transformation preserves angles and distance between points. If these aspects are preserved than the image is congruent. The only non-rigid transformation listed is dilation, therefore D must be correct.  

Answer:

d

Step-by-step explanation:

Answer:

B.(10,-1)

Step-by-step explanation:

10-(-1)=11

2(10)+(-1)=19

20+(-1)=19

Answer:

Whatever problem choice is equivalent to 2

Step-by-step explanation:

Answer:

436.75

Step-by-step explanation:

Answer:

436.75

Step-by-step explanation:

Answer:

6 miles

Step-by-step explanation:

3 plus 3= 6

Answer:

6 miles

Step-by-step explanation:

3 miles + 3 miles = 6 miles

Answer:

C

Step-by-step explanation:

Answer:

318

Step-by-step explanation:

math wiz

Answer:

x^3-6

Step-by-step explanation:

cube the variable and subtract 6