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iVinArrow [24]
2 years ago
9

What is the proper to do 81x400

Mathematics
2 answers:
ludmilkaskok [199]2 years ago
6 0

Answer:

Step-by-step explanation:

To perform this multiplication I would rewrite the expression as

81*4*100.  This is easier to do mentally:  4 times 81 is 324, and then 324 times 100 is 32,400.  There are of course other approaches involving factoring the original expression and performing multiplication.

Cerrena [4.2K]2 years ago
5 0

Answer:

81 x400

=32400

Step-by-step explanation:

You might be interested in
Please help!!
postnew [5]

2  \frac{5}{8}  \div 2  \frac{1}{2}
Change the mixed fractions to improper fractions.
To do this, multiply the whole number part by the denominator. Add that to the numerator. Then write the result on top of the denominator.

You would now have:
\frac{21}{8}  \div  \frac{5}{2}
Change the division sign to a multiplication sign by turning the second fraction upside down.
That is,
\frac{21}{8}  \times  \frac{2}{5}

The answer is:
\frac{42}{40}

This can be simplified to:
\frac{21}{20}



8 0
3 years ago
Wht equation describes a parabola that opens up or down and whos vertex is at the point (h,v)
LUCKY_DIMON [66]

Answer:

f(x)=a(x-h)^2+k

Vertex form.

Step-by-step explanation:

You are talking about the vertex form for a parabola.

f(x)=a(x-h)^2+k tells us:

A) The vertex is (h,k).

B) Open up (if a is positive) or open down (if a is negative)

C) a also tells us how much it is vertically stretched or compressed.

7 0
3 years ago
The distance between Vancouver and Winnipeg is approximately 1850 km in a straight line. The distance on a map is 3.7 cm. Write
yKpoI14uk [10]
3.7cm on the map represents 1850km in reality

3.7cm : 1850km

1cm : 1850/3.7 km

1cm : 500km

Scale statement for map is :          1cm : 500km.

That is 1cm on map represents 500km.

1cm : 500km.       Recall 1km = 1000m = 100 000cm

1cm : 500* 100000cm

1cm : 50 000 000cm

1: 50 000 000.

Scale factor is 50 000 000.   
8 0
3 years ago
What is the answer to this question really need the answer
jeyben [28]

Answer:

A, B, D

Step-by-step explanation:

2 x 3x =6x - 2 times 9y which equals 18y+ and 2 times 18 equals 36 so 2(3x-9y+18)

3 0
3 years ago
1
Nina [5.8K]
B, is the correct answer
4 0
3 years ago
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