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3 years ago

What product is equivalent to 25x^2 - 16?

Mathematics

2 answers:

malfutka [58]3 years ago

7 0

Answer:

(5x-4)(5x+4)

Step-by-step explanation:

BlackZzzverrR [31]3 years ago

3 0

25x^2 - 16 = (5x - 4)(5x + 4)

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How many seconds will light leaving Los Angeles take to reach the following locations (a) San Francisco (about 500km), (b) Londo

kondor19780726 [428]

Answer:

a) It takes 0.0017s for the light to reach San Francisco.

b) It takes 0.033s for the light to reach London.

c) It takes 1.334s for the light to reach Mars.

d) It takes 149.7s for the light to reach Venus.

Step-by-step explanation:

Here we can solve this problem by using this following formula:

$s = \frac{d}{t}$

In which s is the speed(in km/s), d is the distance(in km) and t is the time(in s).

The light speed is 299 792 458 m / s = 299,792.458 km/s, so $s = 299,792.458$

(a) San Francisco (about 500km)

Find t when $d = 500$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{500}{t}$

$299,792.458t = 500$

$t = \frac{500}{299,792.458}$

$t = 0.0017s$

It takes 0.0017s for the light to reach San Francisco.

b) London(about 10,000km)

Find t when $d = 10,000$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{10,000}{t}$

$299,792.458t = 10,000$

$t = \frac{10,000}{299,792.458}$

$t = 0.033s$

It takes 0.033s for the light to reach London.

(c) the Moon (400,000km)

Find t when $d = 400,000$ . So

$s = \frac{d}{t}$

$299,792.458 = \frac{400,000}{t}$

$299,792.458t = 400,000$

$t = \frac{400,000}{299,792.458}$

$t = 1.334s$

It takes 1.334s for the light to reach Mars.

(d) Venus (0.3 A.U. from Earth at its closest approach).

Each A.U. has 149,59,7871 km.

So 0.3 A.U. = 0.3*(149,597,871) = 44,879,361.3. This means that $d = 44,879,361.3$ . So:

$s = \frac{d}{t}$

$299,792.458 = \frac{44,879,361.3}{t}$

$299,792.458t = 44,879,361.3$

$t = \frac{44,879,361.3}{299,792.458}$

$t = 149.7s$

It takes 149.7s for the light to reach Venus.

3 0

3 years ago

A pattern on a quilt is made up of pieces of fabric in the shape of parallelograms. one piece of fabric is shown. what is the ar

anygoal [31]

Please upload the picture of one piece of fabric.

8 0

3 years ago

HELP PLEASE AND THANK YOU

larisa [96]

Answer:

f(-2) = 90

Step-by-step explanation:

Plugging in the value of f(x) into the equation:

f(-2) = 5(-2)3^(-2)

f(-2) = 5(-2)(-9) - evaluate the power first

f(-2) = 90 - multiply from left to right to obtain answer

5 0

3 years ago

The midpoint of VW is M(9, 8). One endpoint is W(8, 6). Find the coordinates of the other endpoint V.

Stells [14]

Answer:

you would find the slope from the midpoint to the endpoint and apply that to the other side, don't know exactly what the coordinates are.

Step-by-step explanation:

5 0

3 years ago

I need help on ratios

Klio2033 [76]

Answer:

-help

Step-by-step explanation:

A ratio compares values. A ratio says how much of one thing there is compared to another thing. A ratio indicates how many times one number contains another.

example: there are 6 girls to 4 boys. (6:4)

4 0

3 years ago