Eva estimate the 475 songs will fit on her MP3 player. The actual amount of songs that fit is 380. Find percent error

Mathematics

1 answer:

Shalnov [3]2 years ago

4 0

Answer: 20%

Step-by-step explanation: Let’s use the variable ‘x’ as the percent. You need to make an equation and fill in the blanks. ___ is ____% of ____. So 380 is x% of 475. Now solve the problem. 380/475 = x/100, cross multiply. Now you have 475x = 380 * 100 or 475x = 38000. Now divide each side by 475. Now you have, x = 80%. Now you subtract. 100% - 80%. AND YOU GET 20%

You might be interested in

<img src="https://tex.z-dn.net/?f=5x%20-%2010%20%5Cleqslant%2020" id="TexFormula1" title="5x - 10 \leqslant 20" alt="5x - 10 \le

OlgaM077 [116]

The answer is x = 6
Explanation:
First, you must assume that 5x-10=20. Next, you add 10 to 20, which makes the equation 5x=30. Next, divide 30 by 5, which then makes the equation x=6. When you substitute 6 in the original equation, it works, because 5(6)-10 equals 20.

6 0

2 years ago

Solve u^2 = -4, where u is a real number. Simplify your answer as much as possible.

alexdok [17]

Answer:

2i and -2i

Step-by-step explanation:

I'll change u to x to be easier to understand.

x^2 = -4

sqrt(x^2) = sqrt(-4)

sqrt(-4) = 2i, or -2i

8 0

1 year ago

- 16m’n-(-25m’n)+(-7m’n)Which of the following is equivalent to the expression above?

Westkost [7]

As a rule , - times - = + and - times + = -

$\begin{gathered} -16m^2n-(-25m^2n)+(-7m^2n\text{ ) } \\ =-16m^2n+25m^2n-7m^2n\text{ ( based on the rule above )} \\ =+9m^2n-7m^2n\text{ ( -16 + 25 = + 9 )} \\ =+2m^2n \end{gathered}$

Therefore the correct answer to the question is 2m squared n

5 0

11 months ago

A gazelle can change its speed from 0 to 45 mph in 2 seconds. What is the gazelle's acceleration?

Alex787 [66]

Answer:

average acceleration a=change in velocity / time it took to get to velocity

a=(45-0)mph / 2s = 22.5 mph/hr/s

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Identify the coordinates for point B. Type your answer in the form (#,#), without spaces.

neonofarm [45]

Answer:

point B = (3,-2)

Step-by-step explanation:

7 0

2 years ago