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2 years ago

SOMEONE HELP!!!!!! Don’t use what websites! And please like list answer 1,2,3, and 4

Mathematics

1 answer:

harkovskaia [24]2 years ago

8 0

Answer:

1. 24 2. 20 3. 1.75(I think) 4. 11

Step-by-step explanation:

3 might be incorrect but The others seem more correct than ever :)

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Write these numbers in standard form

sertanlavr [38]

Answer:

1. 2 × 10⁵

2. 8 × 10⁴

3. 9 × 10⁸

4. 1 × 10¹⁰

Step-by-step explanation:

3 0

2 years ago

A circle has centre (3,0) and radius 5. The line y = 2x + k intersects the circle in two points. Find the set

lara [203]

A circle with center $(3,0)$ and radius $5$ has equation

$(x-3)^2+y^2=25 \iff x^2 + y^2- 6 x = 16$

If we substitute $y=2x+k$ in this equation, we have

$x^2+(2x+k)^2-6x=16 \iff 5x^2+(4k-6)x+k^2-16=0$

This equation has two solutions (i.e. the line intersects the circle in two points) if and only if the determinant is greater than zero:

$\Delta=b^2-4ac=(4k-6)^2-4\cdot 5\cdot (k^2-16)>0$

The expression simplifies to

$-4 (k^2 + 12 k - 89)>0 \iff k^2 + 12 k - 89$

The solutions to the associated equation are

$k^2 + 12 k - 89=0 \iff k=-6\pm 5\sqrt{5}$

So, the parabola is negative between the two solutions:

$-6-5\sqrt{5}$

8 0

3 years ago

Hi this is algebra math. It’s been a while since I’ve been on this app but I need some help on if the problem graphed the slope

Umnica [9.8K]

The graph is wrong, the slope is correct but because the sign is less than y that means the line on the graph should be dotted not solid.

8 0

2 years ago

Why is -x/y equivalent to x/-y

balandron [24]

Answer:

Step-by-step explanation:

standard form of fraction = -a/b

Example:

-4/2 = -2

4/-2 = -2

5 0

2 years ago

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Feliz [49]

The answer is b .....

3 0

2 years ago