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Paha777 [63]
3 years ago
10

A student earns an 80% on their science test. If she got 20 questions correct, how many total were on the test?

Mathematics
1 answer:
galina1969 [7]3 years ago
5 0
25 questions
Explanation: 20 divided by 25 is .8 which is 80%
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Find the derivative of f(x) = 8x^2 + 11x at x = 7.
sleet_krkn [62]
Thank you for posting your question here at brainly. Feel free to ask more questions.  

f′(x)=2∗(8x(2−1))+1∗11x(1−1)

which is

f′(x)=16x+11

then let x = 7 gives us

f′(7)=123

      <span>
<span>Hope my answer would be a great help for you. </span> </span>  

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6 0
3 years ago
The recipe says he needs 450 grams of rice for 6 people
Fynjy0 [20]

Answer:

1.35kg

Step-by-step explanation:

450g : 6 people

x : 18 people

To get from 6 to 18, multiply by 3 so do the same to the other side

450 × 3 = 1350g

To convert from g to kg divide by 1000

1350 ÷ 1000 = 1.35kg

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3 years ago
Sharon buys 14 folders for $0.75 each.How much change will she recive if she pays with 15 dollars?
Mashutka [201]
14x0.75=10.5
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so she will get $4.50c
Hope this helps! :D
3 0
3 years ago
Read 2 more answers
An equilateral triangle has a perimeter of 48 centimeters. If the triangle is dilated by a factor of 0.75, what is the length of
elena55 [62]
The length of each side is 28 cm. 
the perimeter of the equilateral triangle is 48 cm. To find each side of the original triangle, you do 48/3=16cm. since the triangle dilate by 0.75, then you can just do 0.75*16=12cm. then you have to add 12 to 16 because the triangle gets bigger by 12 cm. so 16+12=28 cm.
4 0
3 years ago
Convert 0.34285714285 into an improper fraction
Stolb23 [73]

Answer:

34285714285/100000000000

Step-by-step explanation:

To write 0.34285714285 as a fraction you have to write 0.34285714285 as the numerator and put 1 as the denominator. Now you multiply the numerator and denominator by a number that makes the numerator to a whole number.

And finally, we have:

0.34285714285 as a fraction equals 34285714285/100000000000

5 0
3 years ago
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