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maria [59]
3 years ago
9

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

Mathematics
2 answers:
iris [78.8K]3 years ago
8 0
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


Alona [7]3 years ago
4 0
3\cdot3^2+2\cdot3\cdot(-1)-5=27-6-5=16
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Solve equation show all steps what 2x-3x+5=18
PSYCHO15rus [73]

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Hi my lil bunny!

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Let's solve your equation step-by-step.

2x-3x+5=18

Step 1: Simplify both sides of the equation.

2x-3x+5=18\\2x + -3x + 5 = 18

( 2x + -3x ) + ( 5) = 18 (Combine Like Terms)

-x + 5 = 18\\-x + 5 = 18

Step 2: Subtract 5 from both sides.

-x + 5 - 5 = 18 - 5 \\-x = 13

Step 3: Divide both sides by -1.

\frac{-x}{-1} = \frac{13}{-1} \\x = -13

Answer : \boxed {x = -13}

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Have a great day/night!

❀*May*❀

3 0
3 years ago
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Angle ABC has point E on ray BA and point D on ray BC. Points E and D are equidistant from point B. To bisect angle ABC, which o
aivan3 [116]

Answer:

The point in the angle that is equidistant from points E and D

Step-by-step explanation:

I took all three quizzes show me if you have any other questions

3 0
3 years ago
What is the range of the function f(x) = 3x2 + 6x – 8?
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f(x) is a quadratic equation with the x-side squared and a is positive which means that the graph of the function is a parabola facing up. The range of f(x) is given by {y|y ≥ k}, where k is the y-coordinate of the vertex.

, written in vertex form is

, where (h, k) = (-1, -11)

Therefore, range ={y|y ≥ -11}

3 0
3 years ago
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