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Sladkaya [172]
3 years ago
14

How many solutions does this system of equations have 5m-4=7m+8

Mathematics
1 answer:
Stels [109]3 years ago
5 0
Find value of m either add or subtract for m
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What is the value of the expression 5y2 + 4x when x = 2.5 and y = 3?
galina1969 [7]

Answer:

The answer is 40

Step-by-step explanation:

5*3=15

15*2=30

4*2.5=10

So 30+10=40

Hope this helps!!

7 0
3 years ago
Daphne has 3 days to drive 932.4 miles . she wants to have completed about 75% of the drive by the start of day three.which of t
nekit [7.7K]
So, 932.4miles (.75)=699.3miles are the miles that she wants to drive by the start of three days. so each day is 25% because of 75%/3=25%
In two days it will be 50% so, .50(932.4miles)=466.2 miles is the answer.
4 0
3 years ago
A boat can travel 23mph in still water. If it travels 248 miles with the current in the same length of time it travels 120 miles
mixas84 [53]

Answer: the speed of the current is 8 mph.

Step-by-step explanation:

Let represent the speed of the current

boat can travel 23mph in still water. This means that the total speed with which the boat travelled is (23 + x) mph.

Time = distance/speed

If it travels 248 miles with the current, it means that the time it took the boat to travel with the current is

248/(23 + x)

in the same length of time it travels 120 miles against the current. This means that the total speed with which the boat travelled is (23 - x) mph. The time it took the boat to travel against the current is

120/(23 - x)

Since the time is the same, it means that

248/(23 + x) = 120/(23 - x)

Cross multiplying, it becomes

248(23 - x) = 120(23 + x)

5704 - 248x = 2760 + 120x

120x + 248x = 5704 - 2760

368x = 2944

x = 2944/368

x = 8 mph

4 0
3 years ago
The volume of a cube is 125 cubic inches. What is the length of one side of the cube?
ikadub [295]
*******************************************************
6 0
3 years ago
How do you find the circumphrence, radius, and volume of a circle?
Andrej [43]
To find circumference u multiply the radius or diameter by 3.14 to find radius u divide the diameter by 2
5 0
3 years ago
Read 2 more answers
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