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valentina_108 [34]
3 years ago
15

always teacher gave her science test with 25 questions on it she scored 80% on the test how many questions did she answer incorr

ectly​
Mathematics
2 answers:
Ulleksa [173]3 years ago
6 0

She got 5 incorrect on her test

quester [9]3 years ago
5 0

Answer:

She got 5 incorrect.

Step-by-step explanation:

In order to find this, we start by using the formula for percentage.

Correct/Total = Percentage

Now we put in known quantities.

Correct/25 = .8

Now to solve we multiply both sides by 25

Correct = 20

Since she got 20 correct, we know she got 5 incorrect

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78 is what percent of 110
irinina [24]

Answer: 70.909090909091%

Step-by-step explanation: Reading through the problem we have <em>78 is</em>, that's 78 equals, <em>what percent</em>, x/100, <em>of 110</em>, times 110.

It's important to understand that <em>percent</em> means over 100 so what percent would simply mean <em>x/100</em> or any variable but I will be using x.

So we have the equation 78 = \frac{x}{100} *110

So cross canceling the 110 and 100 to 11 and 10, we have 78 = \frac{11x}{10}

Multiply both sides by 10 to get rid

of the fraction and we have 780 = 11x.

Now divide both sides by 11 and 70.909090909091 = x.

So, 78 is 70.909090909091% of 110.

Work is attached in the image provided.

8 0
3 years ago
An example of a unti price youd find in germany-
mamaluj [8]
An example of unit price in germany is the electricity
6 0
2 years ago
Witch fraction has the same value as 2 3/3
saul85 [17]

Answer: Technically, it would be 9/3, but you can simplify that to 3.

3 0
3 years ago
Read 2 more answers
The league championship 800 meter race has 6 runners.
s2008m [1.1K]

Answer: 120

Step-by-step explanation:

Given : The league championship 800 meter race has 6 runners.

The number of positions = 3

Since order matters here , so we use Permutation.

The permutation of n things taking r at a time is given by :-

^nP_r=\dfrac{n!}{(n-r)!}

Then, the number of different ways they place first, second, and third :_

^6P_3=\dfrac{6!}{(6-3)!}=\dfrac{6\times5\times4\times3!}{3!}=120

Hence, they can place first, second, and third in 120 different ways .

7 0
3 years ago
A family wants to rent a car to go on vacation. Company a charges $70.50 and $.50 per mile. Company B charges $35.50 and nine ce
Naddik [55]

Answer:

Company A is 1.99 times B.

Step-by-step explanation:

Company A charges:

A=70.50+0.50=\$71/mile  

Company B charges:

B=35.50+0.09=\$35.59/mile

We just need to divide A by B:

x=A/B=1.99

Therefore, company A is 1.99 times B.

I hope it helps you!

     

5 0
3 years ago
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