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Phantasy [73]
3 years ago
5

5p-3r=1

Mathematics
2 answers:
melomori [17]3 years ago
6 0
To answer, multiply the first equation by 2. Then, add the equations,
                                10p - 6r = 2
                         +       8p + 6r = 4
The resulting sum would be 18p = 6. The value of p from the equation is p = 1/3. Substitute this value to either of the equation,
                                 10(1/3) - 6r = 2    ; r = 2/9
Thus, the answer is letter C. 
Brilliant_brown [7]3 years ago
4 0
If you would like to solve the system of equations, you can do this using the following steps:

5p - 3r = 1     /*2
8p + 6r = 4
__________
10p - 6r = 2
<span>8p + 6r = 4
</span>__________
10p - 6r + 8p + 6r = 2 + 4
18p = 6
p = 6/18
p = 1/3

<span>5p - 3r = 1
</span>5 * 1/3 - 3r = 1
5/3 - 3r = 1
5/3 - 1 = 3r
5/3 - 3/3 = 3r
2/3 = 3r
r = 2/9

(p, r) = (1/3, 2/9)

The correct result would be <span>(1/3, 2/9)</span>.
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The question down below
Ratling [72]
Opposite angles are congruent. So the correct answer is A. x=118
3 0
3 years ago
Find the percent of decrease from 340 to 260. Round to the nearest tenth of a percent if necessary.
Marina CMI [18]

To get the solution, we are looking for, we need to point out what we know.


1. We assume, that the number 340 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 340, so we can write it down as 100%=340.

4. We know, that x% equals 260 of the output value, so we can write it down as x%=260.

5. Now we have two simple equations:

1) 100%=340

2) x%=260

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=340/260

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.


7. Solution for 260 is what percent of 340


100%/x%=340/260

(100/x)*x=(340/260)*x - we multiply both sides of the equation by x

100=1.30769230769*x - we divide both sides of the equation by (1.30769230769) to get x

100/1.30769230769=x

76.4705882353=x

x=76.4705882353


now we have:

260 is 76.4705882353% of 340

8 0
2 years ago
Read 2 more answers
Use the Distributive Property to simplify the expression. [Example: 5(4n-3) = 20n - 15] 7(5n-9)
pochemuha

Answer:

I got 17n=5n]26n

I don't know what to do next but I hope it helps  ^^

7 0
3 years ago
Simplify 4x + 3(5x) + 4y - x =​
nataly862011 [7]

Answer:

= 18x + 4y hope this helps :)

Step-by-step explanation:

8 0
2 years ago
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One jar filled with honey weighs 120 grams and one empty jar with half filled honey jar weighs 150 grams what is the weight of t
VMariaS [17]

Answer:

90 grams

Step-by-step explanation

Full = 120

half filled + empty = 150

half of 120 = 60

Therefore, a jar weighs 150 - 60

= 90 grams

5 0
1 year ago
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