so what you do is
a^2-a-20
see, the number in front of the a^2 is 1, so now we do
look at the number infront of the a and the number at the end
-1 and -20
whhat 2 numbers multiply to get -20 and add to get -1
trial and error
-20+1=-19, nope
-10+2=-8 nope
-5+4=-1, yes
(a-5)(a+4) is factored
Answer:
308.4miles
Step-by-step explanation:
Given that radius of earth= 4000miles
Change in latitude = 39° 8' 46" - 34° 43'41"
= 4° 25' 5"
= 4+25/60+5/3600
4+0.4166+0.00138
θ = 4.417°
Converting to radian = 4.417°×π÷180
= 4.417×0.0174
= 0.07710
Distance between the cities = rθ
S = 4000×0.07710
S= 308.4miles
No need to fear, thehotdogman93 is here!
The first step is to get rid of those very large numbers. It's going to be very difficult to factor unless we can bring those high numbers down. So lets see if we can factor each term.
So after dividing 49 with every single digit. The only number that divides evenly is 7 and one, and 16 isnt divisible evenly by 7 so that didn't work. Looks like we're gonna have to work with these big numbers.
There is something interesting though about these numbers. 16 and 49 are both perfect squares. 16 is the same as 4^2 and 49 is the same as 7^2. So we can factor the whole trinomial as:
If we were to expand this out as:
and multiply it back into the original form. It would match with the expression we started with. The 4's would multiply back into 16x^2 and the 7's would multiply back into 49.
Additionally 4 * -7 is -28, so you can combine two -28x's into the -56x term in the original trinomial.
Thus, the answer is yes you can, and the answer is:
X=-3+y is the answer I got
Answer:
4 °C
Step-by-step explanation:
In Nuuk the average high is -6 °C, and the average low is -10 °C.
Net change is the difference between the high and the low values, here is called average net change because average values of high and low temperatures are used. Then, the average net change is: (-6) - (-10) = 4 °C