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Verdich [7]
3 years ago
14

Explain how to find 40×50 using mental math

Mathematics
2 answers:
lara [203]3 years ago
5 0
Just do 4x5 then add the zeros
umka21 [38]3 years ago
3 0
Think about 40 over 50 and a line separating the answer from the problem like this:

                 40
              x 50
              ---------
                200         0*0=0 5*4= 20 so just put the zero back on the answer and you get 200.

the answer goes under the dotted line
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Find the sum <br> 3n/ n^2 +4n+4 + 7/n^2+6n+8
Marianna [84]

Answer:

1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1=1-1=0

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Help me pls i really dk
kondaur [170]
I think its easier to work out part (c) first:-

People who liked anything except burger  = 3/8 + 1/4 + 1/5 =  33/40

So the fraction who liked burgers = 7/40.

7/40 of the total liked burgers   so total people surveyed = (40/7) * 126 =  720

ANswer to c is 720.

a) Number who liked  chicken and laksa = (3/8 + 1/4) * 720  =  450 Answer

b)  Number who liked pasta =  1/5 * 720  =  144

Therefore  144-126  =  18 more people liked pasta than burger , Answer.
7 0
3 years ago
A machine paints 34o toy boats im 3/4 of an hour how many boats can he make per hour
leonid [27]
Here, we can set up a proportion:

34 ÷ 3/4 = ? ÷ 1
34*1 = 34
34÷3/4 = the time needed to build one toyboat

34/3/4 = 45.3333333333

45.3 repeating is not a whole number, so we need to approximate. 

45 is the closest whole number, 

So.. a machine can paint 45 toy boats per hour. 

I really hope that helped! :) 

7 0
3 years ago
How do I Graph y=  –73x+2 .
Romashka-Z-Leto [24]

Answer:

See attachment

Step-by-step explanation:

You can obtain any two points on the graph of y=-73x+2 and use it to draw its graph.

When x=0, y=-73*0+2=2

So you plot (0,2)

When x=1, y=-73*1+2=-71

You again plot (1,-71).

With a straight edge you can now draw a straight line through the two points.

See attachment

4 0
3 years ago
HElPP<br> what is 232 if it's scaled down by a factor of 1/10
Lynna [10]

Answer:

23.2

Step-by-step explanation:

Scaling down by a factor of 1/10 is equal to dividing the number by 10.

So 232 getting scaled down by a factor of 1/10 is equivalent to 232/10 i.e. 23.2.

3 0
3 years ago
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