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2 years ago

Marissa subtracting a negative number from a positive number her result was negative is that reasonable explain

Mathematics

2 answers:

Alecsey [184]2 years ago

8 0

Answer:

It is reasonable because the absolute value of a negative number could be bigger than the positive number.

Step-by-step explanation:

If marissa subtracted -12 from 7, it would result in a -5 which is a negative number. The absolute value of -12 is 12 and 12 is bigger than 7.

Does that make sense?

Blizzard [7]2 years ago

5 0

Answer:

No, the calculation is not correct.

Step-by-step explanation:

We are given that,

Marissa is subtracting a negative number from a positive number, resulting in a negative number.

For e.g. Let us consider the calculation, 4 - ( -3 )

Now, 4 - ( -3 ) = 4 + 3 = 7.

So, we see that the resulting number is a positive number.

That is, the minus operation with the negative sign will become addition operation.

Hence, the fact that Marissa is obtaining a negative number after subtracting a positive number by a negative number is not reasonable.

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O find the minimum value of the quadratic expression −4x2+8x−25,

fredd [130]

Answer:

Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x

Step-by-step explanation:

we have

$-4x^{2}+8x-25$

This is a vertical parabola open downward

The vertex is a maximum

Find the vertex

step 1

Factor the leading coefficient -4

$-4(x^{2}-2x)-25$

step 2

Complete the square

$-4(x^{2}-2x+1-1)-25$

step 3

$-4(x^{2}-2x+1)-25+4$

$-4(x^{2}-2x+1)-21$

step 4

Rewrite as perfect squares

$-4(x-1)^{2}-21$

the vertex is the point (1,-21)

The maximum value of the quadratic equation is (1,-21)

therefore

Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x

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2 years ago

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alukav5142 [94]

Answer:

1920

Step-by-step explanation:

7 0

1 year ago

Which best describes the graph of the cubic function f(x) = x3 + x2 + x + 1?

EleoNora [17]

Answer:

Option A

Step-by-step explanation:

f(x) = x³ + x² + x + 1

This is increasing function

The first option is correct

<em>See attached graph for reference</em>

3 0

2 years ago

Let an integer be chosen at random from the integers 1 to 30 inclusive. Find the probability that the integer chosen is divisibl

MAVERICK [17]

There are a total of 30 integers and 10 of these are divisible by 3 (3, 6, 9, 12, 15, 18, 21, 24, 27, and 30). So the probability of getting an integer divisible by 3 is $\frac{10}{30}$ = 1/3. The answer is letter C.

4 0

2 years ago

Jonathan has a bag that has 2 red marbles and 3 blue marbles inside of it if you were to pick one marble from the bag without lo

Vika [28.1K]

There are 2 red marbles and 3 blue marbles, with a total of 5 marbles in the bag.

When Jonathan chooses a marble, we are saying that he is choosing the marble randomly.

Let's make a fraction. We want to know the chance of picking one of the 2 red marbles among all 5 marbles.

Divide 2 by 5

2/5

That's already a simplified fraction. If you want to convert this into decimal and into percentage, you would get

2/5
= 0.4
= 40%

Those are all acceptable answers.
Have an awesome day! :)

8 0

2 years ago