Answer:
D
Step-by-step explanation:
For simplify the work we can start to factorise all the possibles expressions:
2x + 8.
8 is multiple of 2, so it can became
2(x+4)
x^2 - 16 this is a difference of two squares, so it can be rewritten as:
(x+4)(x-4)
x^2 + 8x + 16
we have to find two numbers whose sum is 8 and whose product is 16
the two number are 4 and 4
it becames:
(x+4)(x+4)
x+ 4 can‘t be simplified
if we look at the expression, we can find that x-4 appears at the numerator so
x^2 - 16 must be at numerator
but the second factor (x+4) doesn’t appear, so has been simplified. This situation can be possible only in the D option
in fact
(x+4)(x-4)/2(x+4) * (x+4)/(x+4)(x+4)
it became
(x+4)(x-4)/2 * 1/(x+4)(x+4)
(x-4)/2(x+4)
Answer:
it's third option the one who says 10 units up
Answer:
125
Step-by-step explanation:
There are four right angles in a triangle so i divided 500 by 4
Answer:
<u>p=18</u>
Step-by-step explanation:
4(p−7)=44
<em>dividing both sides by 4</em>
p−7=11
<em>adding both sides by 7</em>
p=11+7
<em>adding 11 and 7 to get</em>
p=18
Answer:
Jill's rate of running = 4.667 miles/hr
Step-by-step explanation:
Let's say that rate of running = x miles/hr
so rate of biking = (x + 10) miles / hr
Time of running = rate of running / distance of running = x/6
Time of biking = rate of biking/distance of biking = (x+10)/12
Total time of cycling and biking = Time of running + Time of biking
Given that total time of cycling and biking = 2 hrs
⇒ 2 = (x/6) + ((x+10)/12)
⇒ 2 = (2x+x + 10)/12
⇒ 2 × 12 = 3x + 10
⇒24 - 10 = 3x
⇒x = 14/3 =4.667 miles/hr
Hence Jill's rate of running = 4.667 miles/hr
