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zloy xaker [14]
3 years ago
10

If you can solve 20 multiplication facts in one minute how long will it take to solve 50 facts

Mathematics
2 answers:
Ad libitum [116K]3 years ago
8 0

If you can solve 20 multiplication facts in one minute then you could solve 50 multiplication facts in 3 minutes

1 minute = 20 facts

2 minutes = 40 facts

3 minutes = 60 facts

We can check our work by doing the unit rate:

60 facts ÷  3

____________     <--- fraction bar

3 minutes ÷  3

= 20 facts

__________ (20 facts per minute)

 1 minute

mezya [45]3 years ago
5 0

Answer:

150s or 2 min and 30 s

Step-by-step explanation:

20 facts = 1 min

10 facts = 30s

50 facts = ? min

50 / 10 = 5

30 * 5 = 150s

150s = 2 min and 30 s

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Then length of a stick is 81 millimeters. How many centimeters is it!?! who ever get it right first gets brainlest!
liberstina [14]
8.1 cm is your answer hopes this helps
6 0
3 years ago
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What must be added to each term of the ratio 3:5, so that it becomes 4:5​
Alexxandr [17]

Answer:

5 must be added to both the terms to get the ratio 4:5.

Step-by-step explanation:

(3+x)/(5+x)=4/5

Therefore,

15+5x=20+4x

=5x-4x=20-15

=x=5

I hope it's helpful!

7 0
3 years ago
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2(3x + 5) = 9x + 9 - 3x + 1​
ELEN [110]
2(3x+5)=9x+9-3x+1
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6x+10=9x+9-3x+1
6x+10=(9x-3x)+(9+1)
6x+10=6x+10
6x-6x+10=6x-6x+10
10=10
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0=0
All real numbers are solutions.
3 0
3 years ago
Graph the inequality y+4&lt;-2(×+4)​
rodikova [14]

y + 4 <  - 2(x + 4) \\  \\ 1. \:  -  \frac{y + 4}{2}  > x + 4 \\ 2. \:  -  \frac{y + 4}{2}  - 4 > x \\ 3. \: x <  -  \frac{y + 4}{2}  - 4

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6 0
3 years ago
Bill can mow a lawn in 40min and jhon can mow for 60min.how long will it take to mow together
valentinak56 [21]

24 minutes.

Let me explain.

The lawn can be any size, but for the purpose of simplicity, let's say it's 240 square meters.

Peter mows 6 square meters per minute if he mows 240 square meters in 40 minutes.

John mows 4 square metres each minute if he mows 240 square metres in 60 minutes.

They'll mow 10 square meters per minute if they work together.

As a result, mowing the entire lawn will take them 24 minutes.

(Note that the location is irrelevant as long as we know how long each man takes to complete the task separately.) The answer would be the same if the field was 1 million hectares in size.)

I hope this helps.

3 0
2 years ago
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