Answer:
x = 5 and x = -19
Step-by-step explanation:
You're on the right track. It's the "discriminant" that tells you what you want to know here. Before starting, arrange the terms of your quadratic in descending orders of x: 5x^2 + 14x - 19 = 0 (Note that I assumed you meant 14x instead of just 14).
Then the coefficients of this quadratic are a = 5, b = 14 and c = -19.
You are referring to the "quadratic formula." It states this:
-b ± √(b²-4ac)
x = -----------------------
2a
So, we insert the a, b and c values as indicated above:
-14 ± √( 14² - 4[5][-19] ) -14 ± √(196 - 4[5][-19] ) -14 ± √576
x = ----------------------------------- = ---------------------------------- = ----------------------
2(10) 20 20
This comes out to:
x = (-14 + 24) / 2 and x = (-14 - 24) / 2
or:
x = 5 and x = -19
<u>Answer:</u>
- 80 km is 9% of 888.89 km.
<u>Step-by-step explanation:</u>
<u>We know that:</u>
<u>Work:</u>
- 80/9 km = 1%
- => 80/9 x 100 = 100%
- => 8000/9 = 100%
- => 888.89 km = 100% (Rounded to nearest hundredth)
Hence, <u>80 km is 9% of 888.89 km.</u>
Hoped this helped.
10 is twice the size of 5 thus 100% bigger
Answer:
They are now dead
Step-by-step explanation:
Jake Paul
Answer:
30mph
Step-by-step explanation:
120 diveded by 4=30
