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slega [8]
3 years ago
12

3a+5b-9: a=2, b=3 that is my question I need help

Mathematics
2 answers:
omeli [17]3 years ago
8 0
Replace a=2 and b=3 into the a and b in the equation to get, 3(2)+5(3)-9=12
Zigmanuir [339]3 years ago
7 0

Answer:

12

Step-by-step explanation:

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The answer would be 19
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3 years ago
The number of fiction books in a libary is %150 of the number of non-fiction books. the libary has 4,000 books in total. how man
Nitella [24]

Answer:

The number of

Fiction books = x = 2400 fiction books

Non fiction books = y = non fiction books

Step-by-step explanation:

Let the number of

Fiction books = x

Non fiction books = y

The libary has 4,000 books in total.

Hence: x + y = 4000........ Equation 1

The number of fiction books in a libary is %150 of the number of non-fiction books.

x = 150% of y

x = 150/100 × y

x = 1.5y

We substitute 1.5y for x in Equation 1

x + y = 4000

1.5y + y = 4000

2.5y = 4000

y = 4000/2.5

y = 1600 non fiction books

Solving for x

x = 1.5y

x = 1.5 × 1600

x = 2400 fiction books.

Therefore,

The number of

Fiction books = x = 2400 fiction books

Non fiction books = y = non fiction books

5 0
3 years ago
Simplify the expression.<br> 8h + (-7.9d) - 16 + 5d - 2.9h
svp [43]

Answer:

-2.8h-26+5d

Step-by-step explanation:

So just combine like terms

For the h, you’d get -2.8

For the d, you’d get 5

For the normal integer, -26

5 0
2 years ago
Read 2 more answers
Your favorite craft store had a weekend sale. On the first day, all $10 items were 70% off. You bought some number of these of t
Svet_ta [14]
For the first day we have the following function:
 f (n) = (0.3 * 10) n + 8
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 The total amount of money is:
 17 + 17 = 34 $
 Answer:
 
you purchase 6 items
 
you spend at the craft store during the sale $ 34
8 0
3 years ago
BRAINLIST AND 100 POINTS!!! PLEASE HELP!!
luda_lava [24]

Answer:

a.) d,c and a,b

Step-by-step explanation:

hope it helped

8 0
3 years ago
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