2 years ago

A blue whale has a length of 28578 mm. What is the length of a blue whale in km? Show work.

Mathematics

1 answer:

vitfil [10]2 years ago

7 0

move the decimal to the left 6 times and you'll get .028578

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Write the expression 4+6a/5 -1+3a/4<br> as a single fraction.

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3 years ago

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scoundrel [369]

Answer:

Last one:

2 x + 4 y = 6. 3 x minus 4 y = 9.

Step-by-step explanation:

2x + 4y = 6

3x - 4y = 9

4y = 3x - 9

2x + 3x - 9 = 6

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2 years ago

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gogolik [260]

Answer:

When x=8, y=-6. When x=10, y=0

Step-by-step explanation:

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You can plug the given y value into the second equation to get:

$x^2+(3x-30)^2=100\\x^2+9x^2-180x+900=100\\10x^2-180x+800=0\\10(x^2-18x+80)=0\\10(x-8)(x+10)=0\\x= 8, 10\\y= -6, 0$

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Find the value of x if O is between D & B and DO = 15, OB = 3x + 7, and DB = 9x - 2 x= ____

pishuonlain [190]

Answer:

x = 4

Step-by-step explanation:

DO + OB = DB

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2 years ago