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3 years ago

100/a = 25 i think its 2500 but I'm not sure

Mathematics

1 answer:

svetoff [14.1K]3 years ago

6 0

Answer:

a=4

Step-by-step explanation:

100/a=25

100/25 =a

a=4

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What number of prime numbers is 3517?

soldier1979 [14.2K]

3517 is a prime number. What else are you looking for?

5 0

4 years ago

Hi can tell what A x-21 =

tester [92]

$A \times -21 = \boxed{-21A}$

3 0

3 years ago

In a large school, it was found that 77% of students are taking a math class, 74% of student are taking an English class, and 70

Iteru [2.4K]

Answer:

0.81 = 81% probability that a randomly selected student is taking a math class or an English class.

0.19 = 19% probability that a randomly selected student is taking neither a math class nor an English class

Step-by-step explanation:

We solve this question working with the probabilities as Venn sets.

I am going to say that:

Event A: Taking a math class.

Event B: Taking an English class.

77% of students are taking a math class

This means that $P(A) = 0.77$

74% of student are taking an English class

This means that $P(B) = 0.74$

70% of students are taking both

This means that $P(A \cap B) = 0.7$

Find the probability that a randomly selected student is taking a math class or an English class.

This is $P(A \cup B)$ , which is given by:

$P(A \cup B) = P(A) + P(B) - P(A \cap B)$

$P(A \cup B) = 0.77 + 0.74 - 0.7 = 0.81$

0.81 = 81% probability that a randomly selected student is taking a math class or an English class.

Find the probability that a randomly selected student is taking neither a math class nor an English class.

This is

$1 - P(A \cup B) = 1 - 0.81 = 0.19$

0.19 = 19% probability that a randomly selected student is taking neither a math class nor an English class

6 0

3 years ago

The scale on a map of Virginia shows that 1 centimeter represents 30 miles. The actual distance from Richmond, VA to Washington,

Leya [2.2K]

The ratio of cm to mi is 1/30, and we are looking for x/110. Since 1/30 = x/110, 30x=110.
x = 110/30 = 11/3 = 3.7 cm

7 0

3 years ago

Please I need help with this question

Anna007 [38]

Answer:

1. No

2. No

3. No

4. No

Step-by-step explanation:

y=2 so you multiply your x by 2 and you should come out with your y

your y should be 1 * 2 = 2 but is 9 ---->for (1, 9)

your y should be -6 * 2 = -12 but is 2 ---->for (-6, 2)

your y should be 2 * 2 = 4 but is -8 ----->for (2, -8)

your y should be 0 * 2 = 0 but is -4 ----> ( 0, -4)

side note -I'm sorry if you get it wrong,hopefully it's right though.

4 0

3 years ago