−2×0.16=?0.16×(−2) equal not equal
0.4÷(−3)=?−3÷0.4 equal not equal
Comment if you need help understanding x'd
Answer:
me lmo
Step-by-step explanation:
2k(7-5k)+11=6k+3(k^2-1)
with work please.
Answer:
Step-by-step explanation:
2k(7-5k)+11=6k+3(k^2-1)
We move all terms to the left:
2k(7-5k)+11-(6k+3(k^2-1))=0
We add all the numbers together, and all the variables
2k(-5k+7)-(6k+3(k^2-1))+11=0
We multiply parentheses
-10k^2+14k-(6k+3(k^2-1))+11=0
We calculate terms in parentheses: -(6k+3(k^2-1)), so:
6k+3(k^2-1)
We multiply parentheses
3k^2+6k-3
Back to the equation:
-(3k^2+6k-3)
We get rid of parentheses
-10k^2-3k^2+14k-6k+3+11=0
We add all the numbers together, and all the variables
-13k^2+8k+14=0
a = -13; b = 8; c = +14;
Δ = b2-4ac
Δ = 82-4·(-13)·14
Δ = 792
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
k1=−b−Δ√2ak2=−b+Δ√2a
The end solution:
Δ−−√=792−−−√=36∗22−−−−−−√=36−−√∗22−−√=622−−√
k1=−b−Δ√2a=−(8)−622√2∗−13=−8−622√−26
k2=−b+Δ√2a=−(8)+622√2∗−13=−8+622√−26
Answer:
780 miles :)
Step-by-step explanation:
Alright, so in one hour, the train goes 130 miles, right?
So, in 6 hours, the train would simply go 130 * 6 = 780 miles! :)
-10, -7, -4, -1, 2, 5, 8
Answer:
+3 every time or the total?
Or is it 18? U specify which
Answer:
$892.50
Step-by-step explanation:
Answer:
The selling price for the 8 ounce bottle is $37.49
Step-by-step explanation:
Markup percentage on the Men's cologne = 63%
Original Cost of a bottle of Cologne = $23
Mark up cost of 8 ounce bottle at the department store = 63% of Original Cost
= 63% of 23
= 0.63 × 23
= $14.49
Total selling price for the 8 ounce bottle = Original cost + Mark up cost
= 23 + 14.49
= $37.49
Hence, The selling price for the 8 ounce bottle is $37.49