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Zina [86]
3 years ago
5

Explain when to use Mental Math

Mathematics
1 answer:
I am Lyosha [343]3 years ago
3 0
It is best to use mental math with some equations (5x5 or something that is easy enough that work does not have to be shown 10 dived by 5
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Find the area of the circle if r = 5 meters. Leave the answer in terms of π.
olya-2409 [2.1K]

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3 years ago
What adds to 1 and multiplies to 2
kicyunya [14]
-2 and 1.

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3 years ago
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Find the mean and range 26 19 23 39 31 34 23 25
Delicious77 [7]
I got 27.5 for the mean
mean: you add up all the #'s and divide them my their quantity( in other words by how many numbers there are)
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4 0
2 years ago
Question 1 of 12, Step 1 of 1
stellarik [79]

Answer:

325 and 375 mph

Step-by-step explanation:

Given :

Distance between plane A and B = 2800

Recall :

Distance = speed * time

Let speed of A = v1

Speed of B = v2

v1 = v2 + 50

Time taken = 4 hours

Distance = speed * time

Total distance = 2800

2800 = v1 * 4 + v2 * 4

2800 = (4v1) + (4v2)

2800 = 4(v2+50) + 4v2

2800 = 4v2 + 200 + 4v2

2800 = 8v2 + 200

2800 - 200 = 8v2

2600 = 8v2

v2 = 2600/8

v2 = 325 mph

v1 = v2 + 50

v1 = 325 + 50

v1 = 375 mph

8 0
2 years ago
A full glass of water can hold of a bottle.
zloy xaker [14]

Answer:

three bottles of water can hold three glass of water

Step-by-step explanation:

one glass of water = one bottle

3 0
3 years ago
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