Use mental math to decide which equations are true. Drag the true equations into the box. 1.23÷101=0.1231.23÷101=0.123 1 . 23 ÷ 10 1 = 0 . 123 returned to choices list.

1

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23

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10

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0

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123

1

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23

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10

1

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123

123

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100

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1

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23

123

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100

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1

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23

12

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3

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10

0

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1

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23

12

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3

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10

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1

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23

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123

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10

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23

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123

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10

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1

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23

1

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230

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10

3

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1

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23

1

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230

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10

3

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1

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23

true equations

step-by-step explanation:

a and d

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !

the argument of alfred t. mahan, henry cabot lodge, and albert j. beveridge was the economically and mass production the the americans could not consume themselves. this led expansion to sell to other foreign nations for profits.

step-by-step explanation:

this is my explanation