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Nikolay [14]
3 years ago
12

Hat is the percent of decrease on an item that went from $25 to $20?

Mathematics
2 answers:
HACTEHA [7]3 years ago
8 0
Your answer is 20% :)
sammy [17]3 years ago
5 0
The answer is 20% decrease
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Please Show Work.
s344n2d4d5 [400]

Answer:

\huge\boxed{x=17}

Step-by-step explanation:

It's important to note that when two angles create a straight line, they are supplementary.

This means their angle measures add up to 180° since a 180° angle is a straight line.

Since we know the measures of both angles in equation form, we can add them together and have them equal 180 to solve for x.

(5x-18) + (4x+45) = 180

Combine like terms:

9x + 27 = 180

Subtract 27 from both sides:

9x = 153

Divide both sides by 9:

x = 17

So x = 17.

Hope this helped!

5 0
3 years ago
Read 2 more answers
Lesson 2 semester B exam algebra 1B unit 7
Elodia [21]
<h2>Answer:</h2>

720 pounds

<h2>Step-by-step explanation:</h2>

Initially, we have that the amount of algae in the pond is 90pounds. Every four hours the amount of algae doubles. If we called t the time and W the amount of algae, we have that:

At \ t=0 \ hours, \ w=90 \ pounds \\ \\ At \ t=4 \ hours, \ w=2(90)=180 \ pounds \\ \\ At \ t=8 \ hours, \ w=2(180)=360\ pounds \\ \\ At \ t=12 \ hours, \ w=2(360)=720 \ pounds

Finally, <em>after 12 hours the amount of algae in the pond is 720 pounds</em>

4 0
3 years ago
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Identify the translation rule on a coordinate plane that verifies that triangle A(-5,1), B(-2,7), C(0,1) and triangle A'(-6,0),
Nady [450]
Thanks for your question!

The rule is (x-1, y-1). If we plus in the original we will get the translated one very time.

Hope this helps!
7 0
3 years ago
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A line passes through the points (7, 10) and (7, 20). Which statement is true about the line? It has a slope of zero because in
geniusboy [140]
Slope formula: \frac{y2-y1}{x2-x1}
Apply. 
\frac{20-10}{7-7} =  \frac{10}{0} = undefined (No slope) 

Thus, that answer is: Choice D. 

If you're wondering why C isn't this answer, it's because  it doesn't matter if 0 is the numerator of a fraction. If it was, then the slope would be 0 regardless. However, if 0 takes place in the denominator, the slope will be undefined; there will be no slope. 
8 0
3 years ago
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Help I need to answer this question now ASAP
Artyom0805 [142]

Answer:

-5

0

0.9

-1.3

Step-by-step explanation:

comment if u still need explanation :)

5 0
2 years ago
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