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schepotkina [342]
3 years ago
5

Sara receives a 10% commission on the first $4000 in sales and 15% on all sales beyond $4000. If Sara receives a commission of $

2530, how much did she sell?
Mathematics
1 answer:
Artyom0805 [142]3 years ago
4 0

Answer:

Step-by-step explanation:

$4000(0.10) = $400

which is less than her paid commission

so we know that she sold more than $4000 worth

if s is sales above $4000

$2530 = 400 + 0.15s

$2130 = 0.15s

s = $14200

so total sales x is

x = $4000 + $14200 = $18200

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Answer:

1. x = 4 and y = 1

2. x= 5 and y = 3

Use the examples below to complete 3 and 4.

Step-by-step explanation:

To solve each system of equations, use elimination.

1. Stack the equations and subtract to perform elimination.

 2x + 2y = 10

-   x + 2y = 6

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

     x         = 4

Substitute x = 4 into an equation to solve for y.

2(4) + 2y = 10

8 + 2y = 10

2y = 2

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2. Stack the equations and subtract to perform elimination.

 3x + y = 18

- 2x + y = 13

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

     x         = 5

Substitute x = 5 into an equation to solve for y.

3(5) + y = 18

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Continue the same method for numbers 3 and 4.

3 0
4 years ago
A real number line can represent both real and imaginary numbers<br><br> True or false ?
forsale [732]

Answer:

True

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Grains of sand are very small, there being about 3000 grains in one cubic centimeter (cm3) of sand. A cm3 is a small cube measur
Anastasy [175]

Answer:

The value is x =  3.000 * 10^9 \  grains

Step-by-step explanation:

From the question we are told that

      1m^3 = 10^6 cm^3

And that

     3000 \  grains \ of \  sand  \  is  \ in \  1cm^3

So the number of sand grain that is in 1m^3 is mathematically evaluated as

      x =  3000 * 10^6 \  grains

=>  x =  3.000 * 10^9 \  grains

4 0
3 years ago
428 is greater to or less or equal to 3 hundred 12 tens 8 ones
VLD [36.1K]

Answer:

428 is equal to 428  

Step-by-step explanation:

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6 0
4 years ago
a daily newspaper has 10225 subscribers when it began publication. six years old later it has 8200 subscribers what is the avera
seraphim [82]

Answer:

The rate of change in number of subscriber for the six years is 3.62%

Step-by-step explanation:

Given as :

The initial subscriber of newspaper = p = 10225

The subscriber of newspaper after 6 years of publish = P = 8200

The time period = t = 6 years

Let The average yearly rate of change = r%

<u>Now, According to question</u>

The subscriber of newspaper after n years = initial subscriber × (1-\dfrac{\textrm rate}{100})^{\textrm time}

Or, P = p × (1-\dfrac{\textrm r}{100})^{\textrm t}

Or, 8200 = 10225 × (1-\dfrac{\textrm r}{100})^{\textrm 6}

Or, \dfrac{8200}{10225} =  (1-\dfrac{\textrm r}{100})^{\textrm 6}

Or, 0.80195 =  (1-\dfrac{\textrm r}{100})^{\textrm 6}

<u>Taking power \dfrac{1}{6} both side</u>

So, (0.80195 )^{\frac{1}{6}} = ((1 - \frac{r}{100} )^{6})^{\frac{1}{6}}

Or, 0.9638 = 1 - \dfrac{r}{100}

Or,  \dfrac{r}{100} = 1 - 0.9638

Or,  \dfrac{r}{100} = 0.0362

Or, r = 0.0362 × 100

i.e r = 3.62

So, The rate of change in subscriber = 3.62%

Hence, The rate of change in number of subscriber for the six years is 3.62% . Answer

4 0
3 years ago
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