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3 years ago

Evaluate the expression below if x=-1 and y=3. 3x²-y²

Mathematics

2 answers:

svlad2 [7]3 years ago

8 0

The answer is -12 I believe

Dmitry [639]3 years ago

7 0

Answer:

-6

Step-by-step explanation:

3x² - y²

plug in x and y

3(-1)² - (3)²

according to PEMDAS, solve the exponents first.

3(1) - 9

multiply

3 - 9

subtract

= -6

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kiruha [24]

Answer:

$\frac{1}{4}$ of the books in the book store are mystery fiction books.

Step-by-step explanation:

Let x represent all the books in the books store.

Then, the fraction of books that are fiction books is $\frac{3}{4}x$

We have that; $\frac{1}{3}$ of the fiction books are mystery books.

The fraction of the books at the bookstore that are mystery fiction books is $\frac{1}{3}\times \frac{3}{4}x=\frac{1}{4}x$ .

Therefore $\frac{1}{4}$ of the books in the bookstore are mystery fiction books.

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3 years ago

A super train travels 1,500 miles in 12.5 hours. How many miles does it travel in one hour?

katen-ka-za [31]

Let's treat the speed in one hour as a variable.
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2 years ago

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Masja [62]

Answer : x= 15 , 4

steps by step solution : plz see in attachment ✌

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2 years ago

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Hitman42 [59]

Answer: Point D

Step-by-step explanation:

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1 year ago

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eduard

Answer:

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Step-by-step explanation:

6 0

2 years ago

Read 2 more answers