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3 years ago

Will give BRAINLIEST if answered

Mathematics

2 answers:

lesantik [10]3 years ago

6 0

Answer:

a/b is a rational number

Step-by-step explanation:

A rational number is a number that can be written as a fraction

it's a repeating decimal and a terminating decimal.

Some fractions like

1/2 and 3/4 can be written as decimals by making equivalent fractions with denominators of 10, 100, or 1000. In addition, any fraction with a denominator that has a 2 or a 5 as a factor can be a terminating decimal. This is because both 2 and 5 are factors of 10. This makes the fraction easy to create with denominators like 10, 100, and 1000, which are easily converted to terminating decimals.

However, any fraction a/b (where b≠0) can be written as a decimal by dividing the numerator by the denominator. So a/b= a ÷ b.

If the division ends, or terminates, which means the remainder is zero, the decimal is a terminating decimal.

I hope I could help!

andrew-mc [135]3 years ago

3 0

Answer:

I think its c

Step-by-step explanation:

because a and b are integer and b=/0

i am only thinking not sure

don't report my answer

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Please Help!

Lisa [10]

We know that

in the right triangle
sin x=opposite side angle x/hypotenuse
opposite side angle x=66 mm
hypotenuse=79 mm
so
sin x=66/79
x=arc sin (66/79)-------> x=56.66°-------> x=56.7°

the answer is
x=56.7°

7 0

3 years ago

A number decreased by 0.37 times the number is 12.6 Find that number.

Semenov [28]

Answer:

Answer below, however this question is worded weirdly

Step-by-step explanation:

x(x - 0.37 ) = 12.6

simplify the equation

x^2 - 0.37x = 12.6

x^2 - 0.37x - 12.6 = 0

3 0

3 years ago

A peculiar six-sided die has uneven faces. In particular, the faces showing 1 or 6 are 1 × 1.5 inches, the faces showing 2 or 5

sveta [45]

Answer:

0.2216

Step-by-step explanation:

The probability of a particular face coming up is proportional to its area.

Hence, we first calculate the areas.

For 1 or 6, area = 1 × 1.5 = 1.5 in²

For 2 or 5, area = 1 × 0.4 = 0.4 in²

For 3 or 4, area = 0.4 × 1.5 = 0.6 in²

Total surface area of the die = 2(1.5) + 2(0.4) + 2(0.6) = 5 in²

Since probability is proportional to area of a particular face, we calculate the probabilities from the ratio of each surface area to the total surface area.

Probability of a 1 showing up = 1.5/5 = 0.30

Probability of a 2 showing up = 0.4/5 = 0.08

Probability of a 3 showing up = 0.6/5 = 0.12

Probability of a 4 showing up = 0.6/5 = 0.12

Probability of a 5 showing up = 0.4/5 = 0.08

Probability of a 6 showing up = 1.5/5 = 0.30

Probability of doubles with the die is a sum of the probabilities of all the possible doubles with the die.

Probability of a 1 double = 0.3 × 0.3 = 0.09

Probability of a 2 double = 0.08 × 0.08 = 0.0064

Probability of a 3 double = 0.12 × 0.12 = 0.0144

Probability of a 4 double = 0.12 × 0.12 = 0.0144

Probability of a 5 double = 0.08 × 0.08 = 0.0064

Probability of a 6 double = 0.3 × 0.3 = 0.09

Probability of a double with the die = (0.09 + 0.0064 + 0.0144 + 0.0144 + 0.0064 + 0.09) = 0.2216

4 0

3 years ago

Simplify the expression:<br> 6x - 4x + 12 - 1

Rus_ich [418]

Answer:

Step-by-step explanation:

$6x - 4x + 12 - 1\\\\$

Add similar elements :6x-4x=2x

Add Subtract the numbers :12-1=11

$=2x+11$

8 0

3 years ago

Read 2 more answers

Simplify the expression by arranging the steps in sequence based on the order of operations 1/6(30x+24)-1/7(63-7×)

alex41 [277]

Answer:

6x-5

Step-by-step explanation:

We apply distributive property to get rid of the first parenthesis, by multiplying each term inside by the factor 1/6:

$\frac{1}{6} (30x+24)-\frac{1}{7} (63-7x)\\\frac{30}{6} x+\frac{24}{6} -\frac{1}{7} (63-7x)\\5x+4-\frac{1}{7} (63-7x)$

now we get rid of the second parenthesis by multiplying the factor " $-\frac{1}{7}$ " times each of the terms inside the parenthesis (notice here that this factor is negative , so it will flip the signs of the terms it multiplies):

$5x+4-\frac{1}{7} (63-7x)\\5x+4-\frac{63}{7} +\frac{7}{7} x\\5x+4-9+x$

Next we combine like terms:

$5x+4-9+x\\5x+x+4-9\\6x-5$

7 0

3 years ago