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atroni [7]
2 years ago
7

2(15 - 20d + 5c) what are all the expretions equalivalent to this

Mathematics
1 answer:
anastassius [24]2 years ago
4 0

Answer:

10c-40d+30

Step-by-step explanation:

( 2 )( 15 + -20d + 5c )

( 2 ) ( 15 ) + ( 2 ) ( -20d ) + ( 2 ) ( 5c )

30 - 40d + 10c

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Who’s right? And why?
kvasek [131]

Answer: Raymond is correct

The DJ charges $75 an hour.

=================================================

Explanation:

x = number of hours

y = total cost

The DJ does a 3-hour event for $275. This means one point is (x,y) = (3,275)

Another point is (5,425) because a 5-hour event costs $425.

Let's find the slope of the line through these two points.

(x_1,y_1) = (3,275) \text{ and } (x_2,y_2)  = (5,425)\\\\m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\m = \frac{425 - 275}{5 - 3}\\\\m = \frac{150}{2}\\\\m = 75\\\\

The slope is 75, meaning that each time y goes up by 75, x goes up by 1.

Flipped around it means each time x goes up by 1, y goes up by 75.

This means each time we add on an extra hour, the cost goes up by $75.

The DJ charges $75 an hour. Raymond is correct.

3 0
2 years ago
Maya spend 40% of her savings to pay for a bicycle that cost her $85. How much money was in Maya's savings to begin with?
notka56 [123]

Step-by-step explanation:

letπ be the percentage of her savings

=40+85

=125

=125+π=100

=π=100-125

=π=75

6 0
2 years ago
Read 2 more answers
Graph the solution of −5a+6&gt;11.<br> Please, I need help!!!
horsena [70]

Answer:

\large\boxed{a

Step-by-step explanation:

-5a+6>11\qquad\text{subtract 6 from both sides}\\\\-5a>5\qquad\text{change the signs}\\\\5a

4 0
3 years ago
HELPPPPPPPPP<br> What is the value of x in the figure at the right?
Tom [10]

Answer:

x=30

HOPE THIS HELPS

-Todo <3

Step-by-step explanation:

60=2x

/2   /2

30=x

8 0
2 years ago
Read 2 more answers
What is the quantum concept of the terminal notion of pi
GrogVix [38]
By applying the variational approach and then comparing the result to the exact solution, we can calculate the error in the approximation. That is the main and major use of Terminal notation of pi.

π/2 = [tex] \lim_{n \to \infty} π  (2j)(2j) / (2j-1)(2j+1)

Here, by this expression, we set the limits, and get the approximate error in the experiment.

Hope this helps!


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5 0
3 years ago
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