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4 years ago

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

Mathematics

2 answers:

svlad2 [7]4 years ago

8 0

The answer is -12 I believe

Dmitry [639]4 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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a pole that is 3.3m tall casts a shadow that is 1.77 m long. at the same time , a nearby tower casts a shadow that is 38.5 m lon

s344n2d4d5 [400]

Answer:

21m

Step-by-step explanation:

First, divide 38.5 by 3.3.

Then, multiply that number by 1.77.

You will get 20.65...

Rounded, you will get 21 because .65 is bigger than half of one.

<em>-kiniwih426</em>

5 0

3 years ago

Prior to the Academy Awards ceremony in 2009, the United Kingdom bookmaker Ladbrokes reported the following odds for winning an

hodyreva [135]

Answer:

Anne Hathaway: 0.154 = 15.4%

Angelina Jolie: 0.048 = 4.8%

Melissa Leo: 0.029 = 2.9%

Meryl Streep: 0.231 = 23.1%

Kate Winslet: 0.714 = 71.4%

Step-by-step explanation:

Odds to probability:

Odds of a:b

The probability is given by:

$p = \frac{a}{a+b}$

Anne Hathaway 2:11

So $p = \frac{2}{2+11} = \frac{2}{13} = 0.154$

Angelina Jolie 1:20

So $p = \frac{1}{1+20} = \frac{1}{21} = 0.048$

Melissa Leo 1:33

So $p = \frac{1}{1+33} = \frac{1}{34} = 0.029$

Meryl Streep 3:10

So $p = \frac{3}{3+10} = \frac{3}{13} = 0.231$

Kate Winslet 5:2

So $p = \frac{5}{5+2} = \frac{5}{7} = 0.714$

3 0

3 years ago

Please help quicky!!!!!!!!!!

olga55 [171]

Answer:

≈ 2,826 cm^3

Step-by-step explanation:

V = πr^2h

V = 3.14 · 10^2 · 9

V = 3.14 · 100 · 9

V = 314 · 9

V = 2,826

6 0

3 years ago

1+1+1+1+1+1+1+1+1+1 who would like to be my friend 1+1+1+1+1+1+1+1

ycow [4]

Answer:

i would :)))))

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is 2 9/16 rounded to the nearest whole number

Alexeev081 [22]

Answer:

Step-by-step explanation:

You first turn 6/16 into a decimal which is 0.5625, then you round that to the nearest whole number. To find decimal divided 6 by 16. 0.<u>5</u> is rounded to 1 because numbers over 5 round up and number below five round down. Then 1 + 2 = 3.

7 0

3 years ago