Answer:
b
Step-by-step explanation:
Answer:
x = 6
Step-by-step explanation:
Given ∠ 1 = ∠ 2 then the segment is an angle bisector and the ratios of sides to base are equal, that is
= 
( cross- multiply )
x(x - 4) = 12 ← distribute left side
x² - 4x = 12 ( subtract 12 from both sides )
x² - 4x - 12 = 0 ← in standard form
(x - 6)(x + 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 6 = 0 ⇒ x = 6
x + 2 = 0 ⇒ x = - 2
However, x > 0 , thus x = 6
Answer:
<h2>31.25% or 1/16 of her test</h2>
Step-by-step explanation:
Step one:
given
let the total amount of her test be x
we are told that she complete 1/8x test in 2/5 of an hour
hence she completed 1/8x in 0.4 hours
let us find the rate at which she completes are test
rate= 1/8x/0.4
convert the numerator to decimal number for easy computation
rate= 0.125x/0.4
rate=0.3125x per hour
Step two:
Hence 1 hour she can finish 0.3125x *1
=0.3125x
She can finish 31.25 % of her test in 1 hour
or 1/16 of her test
So you have to get x by itself first, but you have to do the same thing on both sides in order for it to stay equal.
3/2*2/3+x=-7/2*2/3
6/6+x=-14/6
x=-14/6
Simplify.
x=-7/3 or -2 1/3
Hope this helps! If you have any questions, just ask!
