2 years ago

What is 3 * 2 1/3? A. 7 B. 6 1/3 C. 6 D. 5 1/3

Mathematics

1 answer:

madam [21]2 years ago

6 0

The answer is letter A

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WILL GIVE BRAINLIEST, THANKS, AND 5 STARS! PLEASE HELP ME!

Bogdan [553]

Answer:

-4 and 4

Step-by-step explanation:

Method 1

Apply Difference of Two Squares Formula: $a^2-b^2=(a+b)(a-b)$

Given $x^2-16=0$

Rewrite 16 as 4²

Therefore, $a^2=x^2$ and $b^2=4^2$

$\implies a = \sqrt{x^2}=x$

$\implies b=\sqrt{4^2} =4$

$\implies x^2-16^2=(x+4)(x-4)$

$\implies (x+4)(x-4)=0$

$\implies (x+4)=0 \implies x=-4$

$\implies (x-4)=0 \implies x=4$

Method 2

Given equation:

$x^2-16=0$

Add 16 to both sides:

$\implies x^2-16+16=0 + 16$

$\implies x^2=16$

Square root both sides:

$\implies \sqrt{x^2}=\sqrt{16}$

$\implies x=\pm4$

Therefore, x = -4, x = 4

6 0

2 years ago

Sam is practicing long track speed skating at an ice skating rink The distance around the rink and 250 yards has skated around t

Vladimir [108]

There are 1760 yards in one mile and the rink is 250 yard in perimeter.

This means 3 miles is 5280 yards.

If Sam has already gone around the whole rink 6 times, that means he was traveled a total of 1500 yards.

Sam has 3780 more yards to travel 3 miles.

This means he needs to do 15.12 more laps around the rink. Or 16 if you are rounding.

Hope this helps! :)

3 0

2 years ago

Read 2 more answers

Which equation represents a circle with a center at (-3,-5) and a radius of 6 units?

kondaur [170]

Answer: (x+3)2 + (y+5)2 =36

Step-by-step explanation:

7 0

2 years ago

15. Which answer choice contains all the factors of 10? A. 1, 10 B. 1, 2, 5, 10 C. 1, 2, 5 D. 2, 5

nikitadnepr [17]

B. 1, 2, 5, 10 (To feel space)