3 years ago

The difference of twice a number and 3 is -21

Mathematics

1 answer:

never [62]3 years ago

4 0

Answer:

The answer to the promblem is -7

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nikklg [1K]

Answer:

$\frac{-117}{10}$

Step-by-step explanation:

1) Change the mixed fractions into improper fractions:

$-3\frac{1}{5} + (-8\frac{1}{2} )\\= \frac{-16}{5} - \frac{17}{2}$

2) Multiply the first fraction by 2/2 and the second fraction by 5/5 in order to create common factors on the denominator (You can do this because you are essentially multiplying by one, for example 2/2 = 1):

$\frac{-16}{5} *\frac{2}{2} - \frac{-17}{2} * \frac{5}{5} \\ =\frac{-32}{10} - \frac{85}{10}$

3) Simplify the numerator(top part) while keeping the denominator(bottom part) the same:

$\frac{-32}{10} -\frac{85}{10} \\\\=\frac{-32 - 85}{10}\\ \\= \frac{-117}{10}$

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3 years ago

What is the volume of the triangular prism below?

RoseWind [281]

B is the correct answer

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3 years ago

Find the length of side a<br>will mark brainly

Mekhanik [1.2K]

Answer:

Step-by-step explanation:use the cube to count(cube is in the corner.)

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3 years ago

Please help asap!! will give brainlist :)

Naddik [55]

Yo sup??

Area of trapezium=1/2*(sum of opposite sides)*(height of trapezium)

=1/2*(12.5+17.5)*6

=1/2*30*6

=90 cm²

Therefore the correct answer is option A

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Huilan is years 15 younger than Thomas. The sum of their ages is 73 . What is Thomas's age?

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thomas age:44

huilan age: 29

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