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3 years ago

A b c or d? pls help out thx

Mathematics

1 answer:

Arte-miy333 [17]3 years ago

4 0

Answer: I'm very sure the answer is B

Step-by-step explanation:

If the rocket is going straight up and it's measuring the height and time in seconds it should be at a slight curve but maintaining it's straight curve up making it a linear.

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Which ordered pairs are solutions to the system of inequalities?

IRISSAK [1]

Answer:

C, D

Step-by-step explanation:

We can solve this graphically and analytically.

Graphically, looking at the attached image below, if we graph the two inequalities and plot the points, you can find the points which are solutions by finding the points in the overlapping area.

This obviously excludes A as it only appears in $y \geq x+2$

C is included as y $\geq x+2$ includes the point on the line.

D is obviously a solution.

B is however not a solution because is lies on the line $y = \frac{-5x}{2} - 3$ , which the inequality excludes.

Analytically, if we can find one of the two inequalities where it is not a solution, it is not a solution of the system.

A: (0, 0)

$y \geq x+2\\0 \geq 0 + 2\\0 \geq 2\\false$

A is not a solution

B: (-2, 2)

$y \geq x+2\\2 \geq -2 + 2\\2\geq 0\\true$

$y > \frac{-5x}{2} -3\\2 > \frac{-5(-2)}{2} - 3\\2 > 5 - 3\\2 > 2\\false$

B is not a solution

C: (0, 2)

$y \geq x+2\\2 \geq 0 + 2\\2 \geq 2\\true\\\\y>\frac{-5x}{2}-3\\2 > -3\\true$

C is a solution

$y \geq x + 2\\6 \geq -1 + 2\\6 \geq 1\\true\\\\y > \frac{-5x}{2} - 3\\6 > \frac{-5(-1)}{2} - 3\\6 > \frac{5}{2} - \frac{6}{2}\\6 > \frac{-1}{2}\\true$

D is a solution

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3 years ago

Please write the rules for adding two numbers with different signs. Give two examples

Brut [27]

Answer:

use BODMAS rule

Bracket of Division Multiplication Addition and Subtraction

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