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antiseptic1488 [7]
3 years ago
5

A student takes English and American History this semester. The probability that a student passes English is 0.5. The probabilit

y that a student passes American History is 0.4. The probability that a student passes both English and American History is 0.3.What is the probability that the student passes either English or American History or both?
Mathematics
1 answer:
mash [69]3 years ago
3 0

Answer:

50% chance of passing english

40% chance of passing American History

30% chance of passing both classes

Step-by-step explanation:

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6. Regroup the numbers in the following problems, putting the numbers that add up to 10 or a multiple of 10 in parentheses.
svetoff [14.1K]

Answer:

a) (2+8)+9

b) (3+7)+5+4

c) (4+16)+2

d) (31+9)+4

Step-by-step explanation:

a) 2+9+8

2 and 8 add up to 10, so we regroup them in parentheses

(2+8)+9


b) 3 + 5 + 4 + 7

3 and 7 add up to 10, so we regroup them in parentheses

(3+7)+5+4


c) 4 + 2 + 16

4 and 16 add up to 20 which is a multiple of 10, so we regroup them in parentheses

(4+16)+2


d) 31 + 4 + 9

31 and 9 add up to 40 which is a multiple of 10, so we regroup them in parentheses

(31+9)+4

4 0
3 years ago
A scale on a map shows that 2 inches = 25 miles.
Simora [160]
A:
2 inches - 25 miles
x inches - 60 miles

Set up a proportion:
\frac{2}{25} = \frac{x}{60} \\ \\
\frac{2}{25} \times 60=x  \\ \\
\frac{120}{25}=x \\ \\
x=4.8

4.8 inches on the map represent 60 miles.

B:
2 inches - 25 miles
1/4 inches - x miles

Set up a proportion:
\frac{2}{25}=\frac{\frac{1}{4}}{x} \\ \\
\frac{2}{25}x=\frac{1}{4} \\ \\
x=\frac{1}{4} \times \frac{25}{2} \\ \\
x=\frac{25}{8} \\ \\
x=3.125

3.125 miles are represented by 1/4 inches on the map.
4 0
3 years ago
Read 2 more answers
Savannah has a principle of 15000 with a 4.25% and saves 1,275 in interest. How long is she saving for
Nostrana [21]

Answer:

5.73 years

Step-by-step explanation:

Considering she saved 4.25% in each year of the amount $15000.

So, we have to calculate in what time her saving reaches $1275, if she save each year.

it becomes question of simple interest in which

SI = $1275, Principal P= $5000, time T, rate R = 4.25%

we know SI = PRT/100

1275 = 5000×4.25×T/100

⇒T = 1275×100/(5000×4.25)

⇒ T= 5.73 years

4 0
3 years ago
Landon borrowed a book from the library
Anastaziya [24]
Tell Landon to bring back the book and he won't owe any moneyyyyy ;DDd
Because
 the library charges late fees as well.
6 0
3 years ago
Hurry friends, don't write it blank<br> X= 72 Work 2x+ 52159x What
Scilla [17]

Answer:

Step-by-step explanation:

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3 years ago
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