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GaryK [48]
3 years ago
14

Please Help

Mathematics
1 answer:
Fudgin [204]3 years ago
3 0

subtract 1/4 from 7/8

find common denominator, in this case 8

1/4 = 2/8

now you have 7/8 - 2/8 = 5/8 hour left

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Keisha's boat has a top speed of 9 miles per hour in still water. While traveling on a river at top speed, she went 10 miles ups
neonofarm [45]
If she went 10 miles upstream in the same time as she went 20 miles downstream, that means the downstream speed is twice the upstream speed.

The speed is still water is 9 mph.
The speed of the current is c.
Going downstream, the current adds speed, so the sped downstream is 9 + c.
The speed upstream is 9 - c.
9 + c is twice 9 - c.

9 + c = 2(9 - c)

9 + c = 18 - 2c

3c = 9

c = 3

Answer: The speed of the current is 3 mph.

Check:
9 + c = 12
9 - c = 6
By taking into the account the speed of the current, the downstream speed, 12 mph, is indeed twice the upstream sped, 6 mph.

6 0
3 years ago
PLZ HELP A 18,000 gallon swimming pool contains 7,000 gallons of water of water when a hose is placed in the pool and begins add
Alex73 [517]
I don't understand what the actual question is. Is it how long would it take?

6 0
3 years ago
Find the slope of the two points: 4,-3 and 8,-3
uysha [10]

Answer:

0 slope

Step-by-step explanation:

flat horizantal line

no increase in y-value

8 0
3 years ago
Yoku is putting on sunscreen. He uses
aleksley [76]
For this case we can make the following rule of three:
 2 ml -------------> 50cm ^ 2
 c -----------------> 325 cm ^ 2
 From here, we clear the value of c.
 We have then:
 c = (325/50) * (2)
 c = 13 ml
 Answer:
 
I need 13 milliliters of sunscreen to cover his skin.
4 0
3 years ago
Can someone help me solve this question? I'd appreciate it! Thank you.
sveticcg [70]

Step-by-step explanation:

Side a = 63

Side b = 21

Side c = 66.40783 = 21√10

Angle ∠A = 71.565° = 71°33'54" = 1.24905 rad

Angle ∠B = 18.435° = 18°26'6" = 0.32175 rad

Angle ∠C = 90° = 1.5708 rad = π/2Area = 661.5

Perimeter p = 150.40783

Semiperimeter s = 75.20392

Height ha = 21  

Height hb = 63

Height hc = 19.92235

Median ma = 37.85829  

Median mb = 63.86901

Median mc = 33.20392

Inradius r = 8.79608  

Circumradius R = 33.20392  

Vertex coordinates: A[0, 0] B[66.40783, 0] C[6.64078, 19.92235]

Centroid: [24.34954, 6.64078]

Inscribed Circle Center: [12.20392, 8.79608]

Circumscribed Circle Center: [33.20392, 0]

7 0
3 years ago
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