3 years ago

I don't get part B, could u help me explain?

Mathematics

1 answer:

Nikolay [14]3 years ago

7 0

It represents the rate she is texting per second

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Write as a product: ax^2+ay^2–bx^2–by^2+b–a

Vesna [10]

Answer:

$\large\boxed{ax^2+ay^2-bx^2-by^2+b-a=(a-b)(x^2+y^2-1)}$

Step-by-step explanation:

$ax^2+ay^2-bx^2-by^2+b-a\\\\=(ax^2-bx^2)+(ay^2-by^2)+(b-a)\qquad\text{use the distributive property}\\\\=x^2(a-b)+y^2(a-b)-1(a-b)\\\\=(a-b)(x^2+y^2-1)$

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3 years ago

Is the point (4,2) the solution to the system? Why or why not? Explain your reasoning.

VMariaS [17]

Solve the top equation to get on variable on one side
2x-y=6
-y=-2x+6
y=2x-6
then plug in the coordinate for x and y for both equations. if both equations are true then it’s a solution
2=2(2)+6
2=10

4+2=6

so it’s not a solution

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2 years ago

Solve the equation 18y – 17 = 7 for y. A. 1/2 B. 3/4 C. 4/3 D. 4/5

Ivan

the answer is C. 4/3

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3 years ago

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Which of these polygons is not formed by the cross-section created when a plane intersects a cube? Select all that are possible.

lakkis [162]

Answer:

Circle