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Ksivusya [100]
3 years ago
6

Help pls I’ll give extra points

Mathematics
1 answer:
n200080 [17]3 years ago
3 0

Answer:

A

Step-by-step explanation:

Let's go by process of elimination.

Two negatively charged objects will repel each other because they are the same charge, and like repels like. Opposites attract. Same principle for B.

For D, this is true because as the charge decreases, so does the strength of the force between the two objects. This is why you can push two weak magnets that have the same polar sides together, and why you can't with a stronger one.

This leaves us with A, and A is not true because force is inversely proportional to distance, and so if the distance is larger, the force is smaller, and if the distance is smaller, the force is larger. Like how 1/3 is bigger than 1/9.

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X - 1 is inside a cubic root.
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Answer: Choice A.
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3 years ago
Annie is framing a photo with a length of 6 inches and a width of 4 inches. The distance from the edge of the photo to the edge
Ede4ka [16]

Answer:

Part a) The quadratic function is 4x^{2} +20x-39=0

Part b) The value of x is 1.5\ in

Part c) The photo and frame together are 7\ in wide

Step-by-step explanation:

Part a) Write a quadratic function to find the distance from the edge of the photo to the edge of the frame

Let

x----> the distance from the edge of the photo to the edge of the frame

we know that

(6+2x)(4+2x)=63\\24+12x+8x+4x^{2}=63\\ 4x^{2} +20x+24-63=0\\4x^{2} +20x-39=0

Part b) What is the value of x?

Solve the quadratic equation 4x^{2} +20x-39=0

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem

we have

4x^{2} +20x-39=0

so

a=4\\b=20\\c=-39

substitute in the formula

x=\frac{-20(+/-)\sqrt{20^{2}-4(4)(-39)}} {2(4)}

x=\frac{-20(+/-)\sqrt{1,024}} {8}

x=\frac{-20(+/-)32} {8}

x=\frac{-20(+)32} {8}=1.5\ in  -----> the solution

x=\frac{-20(-)32} {8}=-6.5\ in

Part c) How wide are the photo and frame together?

(4+2x)=4+2(1.5)=7\ in

5 0
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Answer:

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I then multiplied 136*12=1,632

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3 years ago
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