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Helen [10]
3 years ago
14

NEED HELP FAST!!!!!!!!!!!

Mathematics
1 answer:
erica [24]3 years ago
7 0

Answer:a=3/4

b=3/4

Step-by-step explanation:

3a+5b=6

9a+7b=12

-3(3a+5b)=-3(6)

9a+7b=12

-9a-15b=-18

9a+7b=12

-8b=-6

b=3/4

3a+5(3/4)=6

3a+15/4=6

3a=9/4

a=3/4

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Sixty people are invited to a party. There are 24 cup in a package and 18 napkins in a package. What is the least number of pack
lbvjy [14]

Answer:

  • 3 packages of cups
  • 4 packages of napkins

Step-by-step explanation:

You need at least enough for 60, so any requirement for a partial package means you need to buy another whole package. The "ceiling" function gives the next higher integer for a non-integer value.

  cups = ceiling((60 cups)/(24 cups/package)) = ceiling(2.5) packages

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  napkins = ceiling((60 napkins)/(18 napkins/package))

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3 years ago
What is the intermediate step in the form (x + a)? = b as a result of completing the
Mrac [35]

Answer:

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Step-by-step explanation:

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x² + 2(9)x + 81 = - 45 + 81

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5 0
2 years ago
Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.
marshall27 [118]
3x-x=(2x+4)-(x+4)? That is my answer but it might not be right
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4 0
3 years ago
Read 2 more answers
Solve 6[4x(72-63)divided3]
GREYUIT [131]
Parentheses first, 72-63 is 9 next multiply by 4 which is 36 the you’ll divide by 3 now you have 12 so multiply that by 6 and you get 72. Just a hint, another way to write that without using the multiply or the divided would be 6[4(72-63)/3] but either way you want is fine. Hope this helped :)
3 0
3 years ago
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