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densk [106]
3 years ago
10

A true-false test consists of 50 questions. how many does a student have to get right to convince you that he is not merely gues

sing Explain
Mathematics
1 answer:
umka2103 [35]3 years ago
7 0
Hmmm. 20 or 30 so the teacher will count the rest,if a student guessed, wrong or right
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Challenger Elementary School has 800 students. Every Wednesday, 12 percent of the students stay after school for Chess Club.
DENIUS [597]
Let's set up a proportion.

\frac{x}{800}  \frac{12}{100}

Then solve for x:
12 x 800 = 9600
9600/100 = 96

96 is 12% of the 800 students. :)

Hope this helped! If you have anymore questions or don't understand, please comment or DM me. :)
8 0
3 years ago
Read 2 more answers
A pile of sand has a weight of 90kg the sand is put into a small bag and a medium bag and a large bag in the ratio 2:3:7
Finger [1]
90kg of sand had been puted in 3 bags but in 2+3+7=12 parts.
90kg/12=7.5kg
Small bag has 2 parts which is 7.5kg*2=15kg
Medium bag has 3 parts which is 7.5kg*3=22.5kg
Large bag has 7 parts which is 7.5kg*7=52.5kg
2:3:7=15kg:22.5kg:52.5kg
15kg+22.5kg+52.5kg=90kg
3 0
3 years ago
PLSSS HELPPP! I will give brainliest and 11 points!!
WARRIOR [948]

Answer:

B:

4 units right and six units up

4 0
3 years ago
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The formula v =bh means that the volume of a prism is equal to its base area times its height. Solve v= bh for b
svetlana [45]
Solve for b means isolate b:

V = bh
V/h = b

Answer:
b = V/h
7 0
3 years ago
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Jerry indicated that after tossing a penny 30 times, the relative frequency of heads was 0.47 (to the nearest hundredth). He ind
natali 33 [55]

Answer:

Incorrect.

Step-by-step explanation:

1 toss could not change the frequency by such a large margin 0.47 ---> 0.55.

The number of heads obtained in 30 tosses = 30 * 0.47 =  14.

So if the next toss came up heads the relative frequency of heads would be

15/31 = 0.48.

4 0
3 years ago
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