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Troyanec [42]
3 years ago
5

Which of the following is equivalent to the expression below?

Mathematics
1 answer:
larisa [96]3 years ago
5 0

Answer:

4a^2-6b^2+12

Step-by-step explanation:

(a^2 - 2b^2 + 3) - (4b^2 - 5) + (3a^2 + 4)

distribute the negative sign to each term in the 2nd expression

a^2-2b^2+3-4b^2+5+3a^2+4

combine like terms

4a^2-6b^2+12

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If a/b and c/d are rational expressions then a/b divided by c/d =a times d/b times c true or false
Tomtit [17]

Answer:

(a d)/(bc)

Step-by-step explanation:

a/b ÷ c/d

Copy dot flip

a/b * d/c

ad / bc

4 0
3 years ago
A local high school has both male and female students.
Kitty [74]

Answer:

a. P(male) = 0.4

b. P(no sport and male) = 0.1

c. Unclear question (isn't it the same as b.?)

Step-by-step explanation:

The data below is what I've worked according to, which isn't very clear from the question so the answers are only correct if this is the correct table of data;

\left[\begin{array}{ccc}&No \ Sports&Sports\\Female&10&32\\Male&7&21\end {array}\right]

a.

P(male) = \frac{7 + 21}{70} \\\\ = \frac{28}{70} \\\\ = \frac{2}{5}

b.

Using the tree diagram in the picture;

P(no \ sport \ and \ male) = \frac{2}{5} * \frac{1}{4} \\\\ = \frac{1}{10}

8 0
2 years ago
PLs help..............
34kurt

3/5 or 60% of the tank will be filled in an hour.

8 0
2 years ago
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What is the inverse of the function f(x) = x + 2?
wolverine [178]
Turn f(x) into y so the equation is y=x+2. Now switch their places so it is x=y+2. Now solve for y. The answer is y=x-2.
8 0
3 years ago
2x-5y=17 ..solve for y
AlladinOne [14]
2x-5y=17\ \ \  \ | subtract\ 2x\\\\
-5y=17-2x\ \ \ | divide\ by\ -5\\\\
y=\frac{-17+2x}{5}\\\\Solution\ is\ y=\frac{-17+2x}{5}.
7 0
3 years ago
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