Corradini905 Corradini905

11-06-2014
Mathematics

contestada

If x = 3 and y = -1, then 3x2 + 2xy - 5 = ?
A: 18
B: 24
C: 12
D: 16

Respuesta :

konrad509 konrad509

11-06-2014

[tex]3\cdot3^2+2\cdot3\cdot(-1)-5=27-6-5=16[/tex]

Answer Link

12-06-2014

[tex]x = 3 , \ y = -1 \\ \\ 3x^2 + 2xy - 5 = 3\cdot 3^2 + 2\cdot 3\cdot (-1)-5=\\ \\=3\cdot 9 -6-5=27-11=16 \\ \\ Answer : \ D: \ \ 16[/tex]

Answer Link

Otras preguntas

What is the value of 6 in 3.567

What is generally true about savings vehicle

the shaded area of the following shape can be found by subtracting the area of the circle from the area of the triangle?

David is paid on a graduated commission scale at Nooter Company. He receives 2% commission on the first $20,000, 6% on sales from $20,000 to $70,000, 8.5% commi

)Which explanation provides the best evidence to support the interpretation that Caesar's pride led to his downfall? Caesar sleeps peacefully through the night

Recently, it was observed that people have started saving more rather than spending. This has impacted the demand for luxury goods and services. The decline in

I need help with number 15 yall

A can of lemonade concentrate has a diameter of 3 inches and a height of 4.5 inches. If the concentrate dissolves in 3.5 cans of water, how much water must be a

________ farmers only grow enough food to survive on ? A. Subsistence B. Agriculture C. South Asian D. Island

what are the causes and effects of the arms race