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ivann1987 [24]
3 years ago
13

Sally is taking a test

Mathematics
2 answers:
artcher [175]3 years ago
7 0
Answer: There were 20 questions and she missed three.

First of all, you need to simplify 85/100.

85/100 / 5/5 = 17/20.

Now that you know how many questions were on the test, subtract 17 from 20.

20 - 17 = 3

So in conclusion, the test had 20 questions and she missed three.

But this question doesn’t have enough info to be honest, if you multiply 17/20 with any number it’s still going to be 85%.
miskamm [114]3 years ago
6 0

Answer:

There was 20 questions on the test.

She got 3 wrong.

Step-by-step explanation:

\frac{85}{100} = \frac{17}{20}

20 - 17 = 3

There was 20 questions on the test.

She got 3 wrong.

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Please help!!! I will mark brainliest
mylen [45]

Answer:

P = 14.9

Step-by-step explanation:

i used distance formula:  

d = √(difference of y-values, squared, + difference of x-values, squared)

distance from (-2,1) and (2,4):  \sqrt{25} = 5

distance from (-2,1) and (-1,-2):  \sqrt{10}

distance from (-1,-2) and (2,4):  \sqrt{45} = 3\sqrt{5}

P = 5 + \sqrt{10} + 3\sqrt{5}  ≈  14.9

4 0
3 years ago
Describe how a power with a zero exponent and a power with a negative exponent can be simplified?
Liono4ka [1.6K]
-----> A<span>ny number at all with a 0 exponent is 1; anything with a -ve exponent means "1 over" i.e. 5^-1 means 1/5, 23^-4 means 1/23^4 etc. 



</span>----->A number to the power of zero is always 1 
<span>A number to the power of a negative number such as 2^-4 is always the reciprocal to the power of 4 so 2^-4 is in fact (1/2) ^4 = 1/2^4 </span>

<span>3^-3/4 is (1/3)^3/4 </span>

<span>(4/9)^-3/5 is (9/4)^3/5
</span>

--->Any number with a zero exponent is equal to 1. A number n to the -x is equal to 1/(n^x)<span>



To simplify a negative exponent expression , I attached an example it is easier that way :)


Hope that helps.xoxo

</span>

7 0
3 years ago
Read 2 more answers
18. Find the radius of a cylinder with a volume of 470.48 feet3 and height of 6.5 feet.
Lynna [10]
V = pi * r^2 * h
V = 470.48
h = 6.5
(pi) = 3.14
now sub

470.48 = 3.14 * r^2 * 6.5....now divide both sides by 6.5(pi)
470.48 / 6.5(3.14) = r^2 
470.48 / 20.41 = r^2
23.05 = r^2.....take sqrt of both sides, eliminating ^2
sqrt 23.05 = r
4.8 = r <==== ur radius is 4.8 ft




8 0
3 years ago
Read 2 more answers
Which number produces a rational number when multiplied by 0.25?
Arlecino [84]
D is the correct answer.

0.25 is rational because it can be represented as a ratio of integers (1/4).

0.45 is rational because it can also be represented as a ratio of integers (9/20).

When you multiply rational numbers, you always end up with a rational number.

0.25*0.45=0.1125 or 1125/10000
4 0
3 years ago
Read 2 more answers
How many inches is 25 feet
Rzqust [24]

Answer:

300 In

Step-by-step explanation:

1 foot = 12in

so, 25×12 =300

3 0
4 years ago
Read 2 more answers
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