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2 years ago

Please help me understand how to do this with an easy explanation

Mathematics

2 answers:

ASHA 777 [7]2 years ago

7 0

Answer:

10 and 10

Step-by-step explanation:

So for the first one, 1-(-9), the two subtraction signs cancel each other out and are turned into an addition symbol. The new equation would now be the absolute value of 1 + 9. As we know, 1 + 9 is 10, and the absolute value of 10 is 10. The absolute value just means how many spaces the number is away from 0, and it will always be positive.

For the second one, -9 -1 would equal -10. Even though -10 is negative, the absolute value will always be positive, so the absolute value of the second one is also 10.

Hope this helps and let me know about any questions!

Blizzard [7]2 years ago

5 0

10 for both have a good day

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3 years ago

Substitute the values for a, b, and c into b2 – 4ac to determine the discriminant. Which quadratic equations will have two real

hoa [83]

Answer: $0=2x^2-7x-9\\0=4x^2-3x-1\\0=x^2-2x-8$

Step-by-step explanation:

We know that the standard quadratic equation is ax^2+bx+c=0

Let's compare all the given equation to it and , find discriminant.

1. a=2, b= -7, c=-9

$b^2-4ac=(-7)^2-4(2)(-9)=49+72>0$

So it has 2 real number solutions.

2. a=1, b=-4, c=4

$b^2-4ac=(-4)^2-4(1)(4)=16-16=0$

So it has only 1 real number solution.

3. a=4, b=-3, c=-1

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So it has 2 real number solutions.

4. a=1, b=-2, c=-8

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So it has 2 real number solutions.

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3 years ago

Read 2 more answers

Let a triangle have sides of 137 in, 127 in,

Margarita [4]

Answer:

I think first add the side 137+ 127 +118=382 / 382cm

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2 years ago

I don't know how to do this. Can someone explain how to please?

Natalija [7]

Answer:

f(5) = -2

Step-by-step explanation:

You look on the x-axis for 5 because f(5) means let x = 5. Then go down to the graph (the red zig-zaggy line) At the red line (you're still directly under the 5) look over to the y-axis to find the value. That's your answer. It is -2. The point (5, -2) is on the red graph.

f(5) = -2

3 0

2 years ago