Dimes and quarters. Total coins = 44 Total value = $9.20 Show work.

Mathematics

1 answer:

Setler79 [48]4 years ago

6 0

D+q=44
.1d+.25q=9.20
d+2.5q=92
-d-q=-44
1.5q=48
q=32
d=44-32
d=12

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dem82 [27]

Answer:

y = 2x - 19

Step-by-step explanation:

Slope-intercept form: y = mx + b

y = (x , y) = 1

m = slope = 2

x = (x , y) = 10

b = y-intercept

Plug in the corresponding numbers to the corresponding variables:

1 = 2(10) + b

First, simplify, and then isolate the variable, b. Note the equal sign, what you do to one side, you do to the other.

First, multiply 2 with 10:

1 = (2 * 10) + b

1 = 20 + b

Next, subtract 20 from both sides of the equation:

1 = b + 20

1 (-20) = b + 20 (-20)

1 - 20 = b

b = -19

Plug in 2 for m, and -19 for b.

y = 2x - 19 is your slope-intercept form.

8 0

3 years ago

Here are two rectangles. The table below represents some values for $$ and $$ such that the areas of the rectangles sum to $$ cm

raketka [301]

The area of the first rectangle would be 18cm² and the area of the second rectangle would be 12cm².

<h3>How to calculate the area of a rectangle?</h3>

To calculate the area of a rectangle we must apply the following mathematical formula:

Side × base = area

According to the above, to calculate the area of the rectangles we must multiply the length of the side by the base as shown below. We must also take into account the table that will give us the value of X that we do not know:

3cm × 6cm = 18cm²
2cm × 6cm = 12cm²

Finally, to know how much the area of both rectangles adds up, we add both values:

12cm² + 18cm² = 30cm²

Note: This question is incomplete because the graph is missing. Here is the graph

Learn more about rectangles in: brainly.com/question/10046743

3 0

2 years ago

How do you graph a linear equation?<br><br>For example, -18x+9y=72

nikdorinn [45]

Basically with the example you have you need to have the x and y variables on different sides.
Equation:
-18x+9y=72 (now you want to add 18x on both sides)
<u>+18x +18x
</u><u>9y=72+18x </u> (next you divide 9 to both sides to get x and y alone)
9
y=8+2x (now that you have the x and y alone this is the final equation)

On the graph you want to put a dot on 8 since it's the y-intercept or the starting point of the equation. After that you want to add 2 every time you go by 1 on the x-axis. I have a picture of a graph...

<em>I hope this help you out :D</em>