Given f(x)=3x+9, find x when f(x)=21

Answer:

Y=30x

Step-by-step explanation:

Y-total cost, so make everything equal to that. 30 is the amount she makes each month so multiply that with x.

Answer: 1: 24 miles per gallon (mpg)

2: 24 miles per gallon (mpg)

Step-by-step explanation: PLEASE GIVE BRAINLIEST IT HELPS ALOT. THANKYOU.

Answer:

The value of AB is 24.

Step-by-step explanation:

AB is the same length as AD. AD is 24, so AB is 24.

250 students

Hi there !

40% ................ 100 students

100% ................... x students

x = 100×100/40 = 10000/40 = 250 students

Good luck !

Hello. :)

So, in order to order numbers, you need to have them all in the same format. For example, in your case, half are fractions and half are decimals. If you want to order them, they all need to be either fractions or decimals.

Let's just convert them to decimals.

In order to do that, all you have to do is divide the numerator by the denominator. Do this to all of the fractions.

-3/10 = -0.3

1/2 = 0.5

Okay, so now all of our terms are in decimal form:

-0.3, 0.5, 0.3, -0.8

So let's start the Ordering process.

Begin with the negative numbers, since they are going to be the smallest.

We have -0.3 and -0.8. If they were positive, 0.8 would be larger. But, in terms of negatives, -0.8 is less than -0.3

So, we have -0.8, -0.3.

Now the positives:

0.5 and 0.3. Just looking at the decimals, you can see that 0.5 is greater than 0.3

So, from least to greatest your answer is:

-0.8, -3/10, 0.3, and 1/2

I hope this helped. :) Feel free to reply with any questions x

Answer:

c

Step-by-step explanation:

Answer:

y=-7x+1

Step-by-step explanation:

The slope-intercept equation is y=mx+b. Where m= the slope and b= the y-intercept. So just plug in the information you know for the answer, y=-7x+1.

Step-by-step explanation:

[tex] - \frac{1}{5} - ( - \frac{3}{8} ) = - \frac{1}{5} + \frac{3}{8} = \frac{ - 8 + 15}{40} = \frac{7}{40} [/tex]

Answer:

irrational

Step-by-step explanation:

it cannot be written as a ratio

The given decimal number is a nonterminating and non-repeating decimal it is irrational.

The given decimal number is 0.828228222822228222228...

We need to identify whether the given decimal number is rational or irrational.

Rational Numbers

The term ratio came from the word ratio which means the comparison of any two quantities and is represented in the simpler form of a fraction. A number is considered a rational number if it can be expressed in the form of a/b where both a (numerator) and b(denominator) are integers. The denominator of a rational number is a natural number(a non-zero number). Integers, fractions including mixed fractions, recurring decimals, finite decimals etc all come under the category of rational numbers.

Irrational Numbers

A number is considered an irrational number if it cannot be able to simply further to any fraction of a natural number and an integer. The decimal expansion of irrational numbers is neither finite nor recurring. Irrational numbers include surds and special numbers such as π. The most common form of an irrational number is pi (π). A surd is a non-perfect square or cube which cannot be simplified further to remove the square root or cube root.

Since the given decimal number is a nonterminating and non-repeating decimal it is irrational.

To learn more about irrational numbers visit:

https://brainly.com/question/4031928.

#SPJ2

Answer:

Andre is correct

Step-by-step explanation:

Andre is correct because the two equations are equal to eachother since they are both equal to y. As for Elena, they seem like they're overcomplicating it. They could do it this way, but it's unnecessary so I think that Andre is more correct because they did it the easier way.

Answer:

Look at step-by-step explanation.

Step-by-step explanation:

The answer to 14 is 70 dollars.

The answer to 16 is 7 miles per hour or 7mph.

Answer:

y = 2x − 5

Step-by-step explanation:

i took the quiz

Answer:

The slope-intercept form is y=mx+b y = m x + b , where m is the slope and b is the y-intercept. Using the slope-intercept form, the slope is 4 .

Step-by-step explanation:

Given:

The number is 0.1588.

To find:

The scientific notation of given number.

Solution:

If a number expressed as a number between 1 and 10 is multiplied by a power of 10, then it is known as scientific notation of the number.

The given number is 0.1588.

Here, leading digit is 1.

There are no zeroes to the right of the decimal point before the leading digit 1.

Leading digit 1 is 1 digit to the right of the decimal value. So,

[tex]0.1588=1.588\times 10^{-1}[/tex]

Therefore, the scientific notation of given number is [tex]1.588\times 10^{-1}[/tex].

Answer:

Right after 0.05

Step-by-step explanation:

I think

Answer:

3

Step-by-step explanation:

Since Roxanne has 36 one inch cubes, the maximum volume of rectangular prism she can have is 36 in³ = 1 in × 1 in × 36 in.

Now, if Roxanne wants a rectangular prism with height 3 inches, this implies that the area of its base is 36 in³/3 in = 12 in².

We now find all the factors of 12 = 1 × 12, 2 × 6, 3 × 4.

So, we have 3 different areas of base of rectangular prism in which the width is shorter than its length the width being the smaller dimension.

So, the different rectangular prisms in which the volume = 36 in³ in which the width is shorter than its length and has a height of 3 in is

1 × 12 × 3, 2 × 6 × 3, 3 × 4 × 3.

So we have 3 different rectangular prisms

Answer:

C.

Step-by-step explanation:

Answer:

[tex]\boxed {m = -7}[/tex]

Step-by-step explanation:

Solve for the value of [tex]m[/tex]:

[tex]-98 = 14m[/tex]

-Switch:

[tex]14m = -98[/tex]

-Divide both sides by [tex]14[/tex]:

[tex]\frac{14m}{14} = \frac{-98}{14}[/tex]

[tex]\boxed {m = -7}[/tex]

Therefore, the value of [tex]m[/tex] is [tex]-7[/tex].

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Number of recipes already known = 4

Number of new recipes learnt per week = 3

Relationship between number of weeks and appetizer recipe :

y = 3w

number of weeks = w

Number of appetizer recipe = y

B.) Linear equation:

y = mx + c

x and y are the independent(x = number of weeks) and dependent variables (y = number of recipes learnt)

C = intercept, value of y, when x = 0 ; number of recipes already known before learning ; 4

m = gradient change in y per change in x; number of recipes Learnt per week ; m = 3

y = 3x + 4

Number of recipes known after 18 weeks :

x = 18

y = 3(18) + 4

y = 54 + 4

y = 58

58 recipes

After 18 weeks, Tara would have learnt (18 * 3) = 54 new recipes plus the already known 4 = (54 + 4) = 58

Answer:

four hundred fifty three three hundred twenty sevenths

Answer:

10

Step-by-step explanation:

23-2.25x10.... ........................

Answer:

90

Step-by-step explanation:

Dialogue (sometimes spelled dialog in American English) is a written or spoken conversational exchange between two or more people, and a literary and theatrical form that depicts such an exchange.

Answer:

Girls are twice as many as the boys.

So let's assume girls to be 'x' and boys to be 'y' and adopt the simultaneous equation method to find out the answer to X and Y.

Firstly, let's us establish that: x + y = 45

Secondly, for every boy there are two girls. So,

2y = x.

We have the value for the 'x' here in the equation, so we will substitute that in the first equation:

2y + y = 45

3y = 45

y = 15

Boys are 15.

Put this answer into any of the equations now, we will the first one:

x + 15 = 45

x = 30

Girls are 30.

Step-by-step explanation:

Hope this helps

Crown me as brainliest:)

Answer:

1.92 x 10

Step-by-step explanation:

3.20-1.28=1.92

10^5-10^4=10

=1.92 x 10

Correct me if I'm wrong

Answer:

The answer is M= (2-3)

Step-by-step explanation: