Answer:
4 mph
Step-by-step explanation:
The speed downstream is (28 mi)/(2 h) = 14 mph.
The speed upstream is (18 mi)/(3 h) = 6 mph.
The speed of the current is half the difference of these:
(14 mph -6 mph)/2 = 4 mph
_____
The current adds to the downstream speed and subtracts from the upstream speed, so the difference of those speeds is twice the current's speed.
<span>4×2-z=7
⇒ 8 - z = 7
⇒ 8 - 7 = z
⇒ 1 = z
</span>
Answer:
see explanation.
Step-by-step explanation:
2(10 * 4 * 7) is a surface area.
7 * 4 * 10 is volume.
2(10 * 4 + 10 * 7 + 4 * 7) is surface area.
10 + 4 + 7 is neither.
2 * 7 * 4 + 2 * 10 * 7 + 2 * 4 * 10 is neither.
hope this helps.
Answer:
For #11 it is X≥-2. For #12 it is X<-1 I think
Step-by-step explanation:
I hope this helps you and please mark me as brainliest
The answer is 13:5 I did this by dividing the numbers by a common factor
