1. 8 + (-4) =
2. -7 + (-8) =
3. -6 + (-3) =
4. 9 - (-5) =
5. 3 - 7 =
Instructions: use a chip model to solve each problem.

Answer:

the equation x - 18 = 4(x - 18)

Step-by-step explanation:

x - 18 = 4x - 72

x - 4x = - 72 + 18

- 3x = - 54

x = 54/3

x = 18

Sally had 36 postcards to begin with (18 + 18)

martha had 0 postcards to begin with

i feel like i did something wrong someone double check this but i think this is the answer.

Answer:

x-18 = 4(x-18)

Step-by-step explanation:

x-18 =4x-72

3x =54

x=54/3

x=27

Answer:

(n*3)+15

Step-by-step explanation:

Number times 3 = 3n

adding 15 so

(n*3)+15

Answer:

I do not agree with her

Step-by-step explanation:

You can find the answer by doing the keep change flip method. So keep the 6, chnage the sign to a multiplication sign, then flip the 2/3 to 3/2. Then you multiply and you get 18/2 which simplifies to 9.

Answer:

4+-2

Step-by-step explanation:

Answer:

y=2x+4

Step-by-step explanation:

Answer:

The answer is D. k=5

Step-by-step explanation:

The constant of proportionality is just the rate the x increases or decreases at.  The x is increasing by 5 over time so the COP or rate is 5.

Answer:

The answer is D: K=5

Step-by-step explanation:

The constant of proportionality is the ratio between two directly proportional quantities. Two quantities are directly proportional when they increase and decrease at the same rate. The constant of proportionality k is given by k=y/x where y and x are two quantities that are directly proportional to each other.

So, what you do is that you get the first number, which is 5/25. Simplify it and divided to get it as low as possible, if you do that, you would get 1/5 and 1/5 can also mean 5/1 in these situations. So your basic answer is 5.

Answer:

I'm pretty sure is number two

Step-by-step explanation:

because I solved the problems

Answer:

The answer is A

Step-by-step explanation:

Express the number in scientific notation as real numbers:

[tex]9.4 \times {10}^{ - 8} = 0.000000094 \\ 9.25 \times {10}^{ - 6} = 0.00000925 \\ 2.5 \times {10}^{3} = 2500 \\ 7 \times {10}^{3} = 7000[/tex]

So, from least to greatest;

[tex]0.000000094 - 0.00000925 - 2500 - 7000[/tex]

9.4 x 10^-8, 9.25 x 10^-6, 2.5 x 10^3, 7 x 10^3 (first option)

Answer:

you would most likely get a decimal but I'm not for sure

Step-by-step explanation:

Answer:

x = 8

Step-by-step explanation:

3(x-2)=18

3x-6=18

3x=24

x=24/3

x=8

Answer:

x = 8

Step-by-step explanation:

3 (x - 2) = 18

3x - 6 = 18

18 + 6 = 24

3x = 24

x =

Answer:

its 90% if you work it out

Step-by-step explanation:

I hope this is the answer

Answer:

The answer is -7.15, hope this helps.

Answer:

I am pretty sure it is 3x-5y=4

Step-by-step explanation:

You have to put the equation in point slope form and 3x-5y=4 in point slope form is y=3/5x-4/5

Answer:

The answer is 3x - 5y = 2

Step-by-step explanation:

Answer: Im going to say 3 over 5 and 8

Step-by-step explanation:

Answer:

$374

Step-by-step explanation:

I=PRT

I=Interest

P= starting amount

R= Rate

T= Time

12*200=2400*(0.0725)=174+200=

$374

The value of the stock when Mateo’s aunt bought it was $150.

Multiplication is the mathematical operation that is used to determine the product of two or more numbers. If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.

We need to find the value of the stock when Mateo’s aunt bought it.

Given that the value of the stock increased by 80%. Its value is now $270.

The stock has increased 80% thus it is now worth 180%.

Then Divide by 180;

$270/180 = $1.50

Now find 100% then Multiply by 100;

$1.50 X 100 = $150

The value of the stock when Mateo’s aunt bought it was $150.

Learn more about multiplications;

https://brainly.com/question/14059007

#SPJ3

Answer:

1.11

Step-by-step explanation:

The Slope is defined as the rate of change.

In this case,

Slope = -200+100/-180+90

         = -100/-90

         = 10/9

         = 1.11

Answer:

The Answer is -1=x .

Answer:

1/5

1/3

Step-by-step explanation:

For the first problem:

5/7 of ... is 1/7

so

5/7 of x is equal to 1/7

so

(5/7)x = (1/7)

so

x = (1/7)/(5/7)

so

x = 1/5

For the second problem:

5/7 of ... is 5/21

so

5/7 of x is equal to 5/21

so

(5/7)x = (5/21)

so

x = (5/21)/(5/7)

so

x = 1/3

Answer:

answer #4

Step-by-step explanation:

because you have 100 tiles. if you fill in 1 tile, that 1 percent. if you fill in 4 tiles, that 4 percent. you fill in 40? 40 percent. and option 2 is not a percentage so it cannot be correct

Answer:

Step-by-step explanation:

[tex]B.\\\left(8\dfrac{4}{5}+3\dfrac{2}{10}\right)+\left(-1\dfrac{1}{5}\right)=8\dfrac{4}{5}+\left(3\dfrac{2}{10}+\left(-1\dfrac{1}{5}\right)\right)=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]

[tex]D.\\8\dfrac{4}{5}+3\dfrac{2}{10}-1\dfrac{1}{5}=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]

[tex]E.\\-\left(-8\dfrac{4}{5}\right)-\left(-3\dfrac{2}{10}\right)+\left(-1\dfrac{1}{5}\right)=8\dfrac{4}{5}+3\dfrac{2}{10}-1\dfrac{1}{5}=8\dfrac{4}{5}+\left(3\dfrac{2}{10}-1\dfrac{1}{5}\right)[/tex]

Used:

Associative property

[tex](a+b)+c=a+(b+c)=a+b+c[/tex]

and

[tex](-)(-)\to(+)\\(-)(+)\to(-)\\(+)(-)\to(-)[/tex]

Answer: D

Answer:

1- more than 1

2-less then 1

3-less then 1

4- less then 1

5-less then 1

Step-by-step explanation:

Answer:

x=14

Step-by-step explanation:

3x-6=2(x+4)

3x-6=2x+8

+6      +6

3x=2x+14

-2x -2x

x=14

Option D is correct  (x, y) → (2.5x, 2.5y).

A pair of numbers called coordinates are used to locate a point or a form in a two-dimensional plane. The x-coordinate and the y-coordinate are two numbers that define a point's location on a 2D plane.

Given, Quadrilateral ABCD was dilated with the origin as the center of dilation to create quadrilateral EFGH on the graph below.

Since Scale factor:

A scale factor is defined as the ratio between the scale of a given original object and a new object, which is its representation but of a different size (bigger or smaller).

In our case,

A dilation of 2.5 because side AB is 4 units and EF is 10 units and if you divide 10/4 will get you with your scale factor.

thus, Scale factor is 2.5

Therefore,  best represents the dilation that was applied to quadrilateral ABCD to create quadrilateral EFGH is D. (x, y) → (2.5x, 2.5y)

Learn more about coordinates here:

https://brainly.com/question/20282507

#SPJ6

Complete question:

Quadrilateral ABCD was dilated with the origin as the center of dilation to create quadrilateral EFGH on the graph below.

Which rule best represents the dilation that was applied to quadrilateral ABCD to create quadrilateral EFGH?

A .(x, y) → (x + 3, y + 1.5)

B. (x, y) → ( x - 1.5, y + 3)

C. (x, y) → (0.4x, 0.4y)

D. (x, y) → (2.5x, 2.5y)

Answer:

I wish I had the answer for you since I feel the same way when I have a teast n iono the answer its soo stressing hope you have u get a good grade by finding the answer some how.  

SRRY

Answer:

40 the answer is far too because you are 36 with 4 and it's equal

Answer:

-14

Step-by-step explanation:

Answer:

-14, fourth choice

Step-by-step explanation:

absolute value is represented with this |x|, the 2 lines

The absolute value for a real number, in this case -14, is the non-negative value without regard to its sign. So the absolute value of -5 would be 5, and the absolute value of 7 would still be 7

In this case there's no 14, so u can choose -14

Answer:

Step-by-step explanation:

Combine like terms:

-4x - 9x = (-4 - 9)x = -13x

4x - (-9x) = 4x + 9x = (4 + 9)x = 13x

-4x + 9x = (-4 + 9)x = 5x

4x - 9x = (4 - 9)x = -5x

Answer:

D. 411.25

Step-by-step explanation:

i did edg.

Answer: 27

Step-by-step explanation: you care the 4 and make it a 7 and then add your 2