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kobusy [5.1K]
2 years ago
12

PLEASE HELP I WILL GIVE OUT BRAINLIST

Mathematics
1 answer:
guapka [62]2 years ago
3 0
Hope this helped :)
Check the image below for working

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On the first math test, Keiko answered 19 out of 25 questions correctly. On the
m_a_m_a [10]

Answer:

Keiko got a better answer on the test on her second test, and you could compare these two ratios as they are written.

Step-by-step explanation:

First: Convert each of the scores into percentages:

How do you convert ratios to percentages? Well, first we have to convert the ratio to a decimal or a fraction. Let's convert it to a fraction. So, 19 out of 25 will become \frac{19}{25}, and 17 out of 20 will become \frac{17}{20}. To convert a fraction to a percentage:

  • Divide the numerator by the denominator:

19 ÷ 25 = 0.76                                        AND                                    17 ÷ 20 = 0.85

  • Multiply your quotient by 100

0.76 x 100 = 76                                      AND                                 0.85 x 100 = 85

  • Add the percent sign

76%                                                          AND                                                   85%

Now the two quantities are easier to compare. We can obviously see that 85% is bigger [and better] than 76%. So, the ratio that equals 85% - 17 out of 20 - is a better grade.

The second question was: Can you compare these two ratios as they are written? Explain why or why not.

Yes, you can compare these two ratios, just find the [positive] difference between the amount that she scored and the total number of scores that could be gained.

25 - 19 = 6

20 - 17 = 3

Since the equation with 20 and 17 in it has a smaller difference, it is most likely to have a greater value [because that means that Keiko got more right and less wrong, which means a greater mark which is also a greater quantity].

Thanks,

Topic: Quantity Relationships, Quantity Conversions

4 0
3 years ago
the ratio of men to women in a certain factory is 3 to 4. there are 210 men. How many workers are there?
Nadusha1986 [10]
So men to women=3 to 4
210 men

210 represents 3 units
wome=4

210=3 units
divide by 3
70=1 unit
multiply by 4 to find women
280=women


total workers=women+men
women=280
men=210
280+210=490

total =490
8 0
2 years ago
Asap! find the length of the arc
Fantom [35]

<u>Answer</u>:

A.  \frac{21}{4} \pi\ \space\ in

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

The formula for arc length is:

arc length = rθ

where:

r is the radius = 7 in

θ is the central angle in radians = 135  ×  \frac{ \space\ \pi\ }{180}  = 3/4 π

Substituting these values into the formula:
arc length = 7 in × 3/4 π

                 = \frac{21}{4} \pi\ \space\ in

                             

6 0
1 year ago
This is flipping a figure over the axis of symmrtry
fgiga [73]

Answer:

Step-by-step explanation:

FSDGGHJKL

4 0
3 years ago
What is teh units form 0.12
tia_tia [17]

Answer:

I think 5/60.......

u welcome

5 0
2 years ago
Read 2 more answers
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