Abrace for a shelf has the shape of a right triangle. it’s hypotenuse is 12 inches long and the two legs are equal in length. how long are the legs of the triangle

The sides of a right triangle can be represented by the equation a^2+b^2=c^2, where c is the hypotenuse and a and b are the legs.  

Since both legs are the same in this equation, we can pick one variable to combine both and add the terms.  The equation would become:

x^4=c^2

We know c=12 so we can plug in and solve for x:

x^4=12^2

x^4=144

x=3.4641

The legs of the triangle are about 3.4641 in long.

Hope this helps!!

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.