1. At the beginning of the year, Maria had $100 in her savings account. She plans to spend $10 a
month on a music app. By the end of January, she will have $90, 580 by the end of February,
$70 by the end of March, and so on. Write an equation that describes the amount in her savings
at any given month. Be sure to describe what your variables represent.

Answer:

6

Step-by-step explanation:

Answer:

B. 14,000

I hope that this helps you, have a wonderful day!

The best estimate from the option is 14,000 since 14,000 is the nearest value from the option to 12763.

Given,

18 x 709

We need to find the best estimate.

We need to multiply each number of one number with the other number and add them to get the product.

Example:

21 x 34 =

21 x 3 = 63

21 x 4 = 84

    2 1

x  3 4

    84

+ 63    

  71 4

We have,

18 x 709

We can write it as:

709 x 18

709 x 8 = 5672

709 x 1 = 709

             709

            x  18

           5672

     +   709  

          12762

Thus the best estimate from the option is 14,000 since 14,000 is the nearest value from the option to 12763.

Learn more about how to multiply numbers here:

https://brainly.com/question/12069004

#SPJ2

Answer:

3.1

Step-by-step explanation:

Answer:

y = 17.5

Step-by-step explanation:

Given that y is directly proportional to x then the equation relating them is

y = kx ← k is the constant of proportion

To find k use the condition y = 35 when x = 140, then

35 = 140k ( divide both sides by 140 )

0.25 = k

y = 0.25x ← equation of proportion

When x = 70, then

y = 0.25 × 70 = 17.5

Answer: ∠ECB = 60°

Step-by-step explanation:

First, find the value of x by adding them up.

x + 3x + 2x = 6x

Since we know that all of the angles create a 180° angle, we can set up a proportion.

6x = 180°

To find the value of x, divide both sides by 6.

6x ÷ 6 = x

180 ÷ 6 = 30

So now the proportion is x = 30.

Now that we now x = 30, we can plug in 30 to the angle measures.

∠DCA = 30°

∠DCE = 90°

∠ECB = 60°

So angle ECB is 60°.

hope this helps!

Answer:

There are two 3s for the imputs (3,6) (3,1)

Step-by-step explanation:

There can only be one output for every input

Answer: B. Controlled experiment

Step-by-step explanation:

This is a controlled experiment because the variables in the question are manipulated by the researcher. We are told that while one group watches television before going to sleep, the other group does not.

The controllers won't have control over the variables that were used if it was an observational study while for a survey, it has to do with collection of information regarding certain topics or happenings in order to have people's perception on the topic or area of interest.

Answer:

Step-by-step explanation:

It would be true

Answer:

k=2 so false

Step-by-step explanation:

Answer:

0.34

Step-by-step explanation:

Answer:

0.04 h

Step-by-step explanation:

The given equation is :

8h=200

It is used to find hours h a person needs to work to earn $200 at $8 per hour.

We need to find no of hours does a person need to work to earn $200. It can be calculated as follows :

[tex]\dfrac{8h}{200}=\dfrac{200}{200}\\\\h = 0.04\ h[/tex]

So, for $200, the person will need 0.04 h.

Answer:

the answer is -22

Step-by-step explanation

Answer:

5.66666666667

Step-by-step explanation:

Answer:

Your estimated monthly payments are $22 and you will pay $26 in interest over the life of the loan.

Step-by-step explanation:

Answer: W = 112 carats

Step-by-step explanation: Let W be the original weight.

So we have

W - 45 = 67 add 45 to both sides

And that equals 112 carats

Answer:

10540.3888889

Step-by-step explanation:

May I have brainliest please? :)

Answer:

only one

Step-by-step explanation:

0.75x+30=0.35x+7+0.35x+7

x=-320

Step-by-step explanation:

what is the question?????

Answer:

Where is the question???

Step-by-step explanation:

Answer:

The answer is 1

Step-by-step explanation:

14 = 2 × 7

51 = 3 × 17

21 = 3 × 7

Answer:$71.50

Step-by-step explanation:

Hello!

So first you want to find out how many bottles of soap you can make

To do that you want to divide how many ounces you have by how many ounces it takes to make 1 bottle

97.5 / 7.5 = 13

So you know you can make 13 bottles of soap

So now you want to multiply the number of bottles of soap that can be made by the amount of money you can make per bottle

13 * 5.50 = 71.50

So you know that the students can make $71.50

Answer:

see explanation

Step-by-step explanation:

x² + 3x + 7 = 5 ( subtract 5 from both sides )

x² + 3x + 2 = 0 ← in standard form

(x + 2)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x ( zero product rule )

x + 2 = 0 → x = - 2

x + 1 = 0 ⇒ x = - 1

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

x² - 2 = - 2x² + 5x ( subtract - 2x² + 5x from both sides )

3x² - 5x - 2 = 0 ← in standard form

(3x + 1)(x - 2) = 0 ← in factored form

Equate each factor to zero and solve for x

3x + 1 = 0 ⇒ 3x = - 1 ⇒ x = - [tex]\frac{1}{3}[/tex]

x - 2 = 0 ⇒ x = 2

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

(x + 3)² + 4x = 0 ← expand left side using FOIL and simplify

x² + 6x + 9 + 4x = 0

x² + 10x + 9 = 0 ← in standard form

(x + 9)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 9 = 0 ⇒ x = - 9

x + 1 = 0 ⇒ x = - 1

Answer:

wow

Step-by-step explanation:

You earnin monnnnnneyyyyyyyyy!!!!!!!!!!!!!!!!!!!

Answer:

It is 40 miles per hour.

Step-by-step explanation:

turning the 2 3/4 to 2.75, you can divide 110 by 2.75 to get 40.

brainliest if i am right? uwu

Answer:

Least possible value of x is 3

Step-by-step explanation:

Given:

x² + 21 = 30

Find:

Value of x

Computation:

x² + 21 = 30

x² = 30 - 21

x² = 9

x = √9

x = 3

Least possible value of x is 3

Answer:

1. -8+3x

2. 51x-2+4x2 (squared)

3. 66x +324

4. 6x+2

5.  13 +13x

Step-by-step explanation:

I don't think I really understand the question but I tried to simplify the equations

Answer:

32

Step-by-step explanation:

f(x) = 7, so:

5 · 7 - 3= 35 - 3 = 32

Answer:

x = 2

Step-by-step explanation:

f(x) = 5x - 3    

7 = 5x - 3

10 = 5x

2 = x

So, x = 2