Mathematics College

How do you solve an inequality when there is a negative number such as -8x is greater than 72

Answers

Answer 1

Answer:

When you divide both sides of an inequality, you need to flip the inequality sign.

Step-by-step example:

-8x > 72

Divide both sides by -8

x < -9

Related Questions

Two claimants place calls simultaneously to an insurer's claims call center. The times X and Y, in minutes, that elapse before the respective claimants get to speak with call center representatives are independently and identically distributed. The moment generating function of each random variable is

M(t)= (1/11.5t)^2 , t < 2/3

Required:
Calculate the standard deviation of X + Y.

Answers

The moment generating function of each random variable is;

M(t) = (1/(1 - 1.5t))^(2), t < 2/3

Answer:

SD[X + Y] = 3

Step-by-step explanation:

For ease of differentiation, let's rewrite the M(t) function as;

M(t) = (1 - (3/2)t)^(-2)

Let's find the first derivative of the function;

M'(t) = 3(1 - (3/2)t)^(-3)

To get E[X], we will put 0 for t to get;

E[X] = 3(1 - (3/2)0)^(-3)

E[X] = 3

Now,let's find the second derivative of M(t)

M"(t) = (27/2)(1 - (3/2)t)^(-4)

At,t = 0, we will get E[X²]

Thus;

E[X²] = 27/2

Now, Var[X] = E[X²] - (E[X])²

Var[X] = (27/2) - 3²

Var[X] = 9/2

We are told that the times X and Y are independently and identically distributed. Thus, the sum of their variances is equal to the variance of their sum. This is expressed as;

Var[X + Y] = 9/2 + 9/2

Var[X + Y] = 9

Now,we know that square root of variance is standard deviation. Thus;

SD[X + Y] = √9

SD[X + Y] = 3

15, 16, 21 determine wether the triangle is acute

Answers

Answer:

no they don't because you could not use those numbers

What is the area of the top AND bottom faces?

Answers

Answer:

Top : 24cm²

Bottom : 24cm²

Step-by-step explanation:

Surface area : Base × Height

Top :

3 × 8 = 24

Bottom :

3 × 8 = 24

CAN SOMEONE HELP ME PLZZZ

Answers

Answer:2440

Step-by-step explanation:

C(x)=4x; R(x) = 6X-.001x²
Marginal cost?

Answers

Answer:

the answer is to commit uninstall

Step-by-step explanation:

gg wp

Find the third degree polynomial function that has an output of 40 when x=1, and has zeros −19 and −i?

Answers

Answer:

[tex]f(x) = (x + 19)(x^2 + 1)[/tex]

Step-by-step explanation:

Complex numbers:

The following relation is important for complex numbers:

[tex]i^2 = -1[/tex]

Zeros of a function:

Given a polynomial f(x), this polynomial has roots [tex]x_{1}, x_{2}, x_{n}[/tex] such that it can be written as: [tex]a(x - x_{1})*(x - x_{2})*...*(x-x_n)[/tex], in which a is the leading coefficient.

Has zeros −19 and −i

If -i is a zero, its conjugate i is also a zero. So

[tex]f(x) = a(x - (-19))(x - (-i))(x - i) = a(x+19)(x+i)(x-i) = a(x+19)(x^2 - i^2) = a(x + 19)(x^2 + 1)[/tex]

Output of 40 when x=1

This means that when [tex]x = 1, f(x) = 40[/tex]. We use this to find the leading coefficient a. So

[tex]f(x) = a(x + 19)(x^2 + 1)[/tex]

[tex]40 = a(20)(2)[/tex]

[tex]40a = 40[/tex]

[tex]a = 1[/tex]

The polynomial is:

[tex]f(x) = (x + 19)(x^2 + 1)[/tex]

Jill collected a total of 19 gallons of honey. If she distributes all of the honey equally between 7 jars, how much honey will be in each jar?

Answers

If jill collected 19 gallons equally between 7 jars it will 109

Which equation is another way to show
5/4?

A. 1/5x1/4=
B. 4x1/5=
C. 4 divided by 5=
D. 5 divided by 4=
E. 5+1/4=

Answers

Answer:

D

Step-by-step explanation:

5 divided by 4 is just 5/4 written out

Help me please I give brainliest and be serious

Answers

Answer:

15, y = 1/2x + 3.75

Step-by-step explanation:

Am not 100% sure but for #15

cuz I graphed it & it looks alike

Andrew bought 3 boxes of granlla bars. There are 13 granola bars in each box. choose the expression that shows how many granola bars Andrew brought.
13+b
13b
b÷13
13÷b​

Answers

Answer:

13b

Step-by-step explanation:

Answer:

The correct Answer is B: 13B

Step-by-step explanation:

Have A Nice Day.

Please help with my math problems

Answers

3x9=27cm^2 so the area should be 27cm^2

Answer:

4. D

6. A

Step-by-step explanation:

The vertex form of the equation of a parabola is y = (x + 5)2 + 49.
What is the standard form of the equation?
O A. y= x2 + 10x + 74
B. y= x2 + 5x +49
O c. y = x2 + 49x + 35
d
O D. y= 5x2 + 10x+ 74
SUBMIT

Answers

Answer:

A

Step-by-step explanation:

Pleaseeeee helppppppp

Answers

Answer:

TIK TOK

Step-by-step explanation:

ON THE CLOCK  

the answer should be 12,
the area of a triangle is 1/2bh
so (1/2)(3)(8)=12

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

Answers

53 and 17

Step-by-step explanation:

If you add 53 and 17, you get 70.

If you subtract 17 from 53, you get 36. Hope this helps!

What is the answer
How do you solve it

Answers

Answer:

-50y+(-80)

Step-by-step explanation:

slove this plzzz plzzz​

Answers

Answer:

an equilateral triangle have equal angles and equal sides.

so, side x and side bc are 12.

Answer:

It's going to be 12, so is the other size.

Step-by-step explanation:

You can see that in each corner, it shows the triangle is the same, which means it is equilateral, so the answer is 12 :D

Which expresses shows another way to write 36+16?

Answers

4(9 + 4), because :

4 * 9 + 4 * 4 = 36 + 16

please help me solve this problem!!

Answers

Answer:

here's the link to the answer

Step-by-step explanation:

WWW.math.com/int.etg

What is the answer to this

Answers

Cos(theta)=a/h
Cos(theta)=12/13
Theta=cos^-1(12/13)
Theta=22.62 degrees

Hope it helps

*NEED HELP QUICKLY*

my son is doing a math assignment and he needs this done within the hour. i tried to help with it but math isn’t my strong suit.

Answers

Answer: undefined

Step-by-step explanation:

I think im not sure tho

X + (x+1) + (x+2) = -21​

Answers

Answer:

x= - 8

Step-by-step explanation: Are you solving for X if so here is the answer

I'm lost on this please help

Answers

Answer:

Y=1/4x+33/4

Step-by-step explanation:

Y=1/4x+b

9=1/4(3)+b

9=3/4+b

8.25=33/4=b

Y=1/4x+33/4

For this cylinder the radius = 6.8 inches and the height L = 14.2 inches. Which is the BEST estimate for the surface area?Use 3.14 what is this answer

Answers

Answer:

896.784

Step-by-step explanation:

Comment if you want the explanation

Which of the following gives a valid reason for using the given solution method to solve the system of equations shown?
Equation 1: 4x - 5y = 4
Equation Il: 2x + 3y = 2
A. Elimination; a coefficient in Equation I is an integer multiple of a coefficient in Equation II.
B
Elimination; a coefficient in Equation II is an integer multiple of a coefficient in Equation I
0
Substitution: Equation I can be solved for x in one step by dividing both sides by 4.
D.
Substitution: Equation Il can be solved for x in one step by subtracting 3y from both sides.

Answers

Answer:

C

Step-by-step explanation:

Factor completely
12n^3 + 15n^2 + 4n + 5

Answers

The answer is 70n +5

the parallelogram height is 1 and 1/2 times the base length and the base length is 6

Answers

are you asking to find the area

|x+3 , if x = 2. Plz help I will pick brainlist

Answers

Answer:

1(2)+3=5

Step-by-step explanation:

The linear function f(x) = 0 5x + 80 represents the average test score in your math class, where x is the number of the test taken. The linear function 9(x) represents the average test score in your science
class, where x is the number of the test taken.
x 0x)
1 81
283
3 85
Part A: Determine the test average for your math class after completing test 2.
Part B: Determine the test average for your science class after the completing test 2.
Part C: Which class had a higher average after completing test 4? Show work to support your answer

Answers

Answer:

more information

Step-by-step explanation:

ce este un numar rational?

Answers

Answer:

ratio

Step-by-step explanation:

ratio what that person said ^^^^! Byeee^

-4x - 4(6x-14) +8(6x-10) - (20x -18)

Answers

Answer:

I believe it is -6

Step-by-step explanation:

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