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kirill [66]
3 years ago
10

Tim has a large collection of books. The number of paperback books he own is 3 times less than 4 times the amount of hardcover b

ooks. In total, Tim has 447 books. How many hardcover books does Tim have?
Mathematics
2 answers:
SSSSS [86.1K]3 years ago
7 0

Answer:

Tim has 90 hardcover books

lbvjy [14]3 years ago
5 0

13

Step-by-step explanation:

because if you multiply 3 times 2. to get 5 then multiply 5 and 4 to get 20 then 447 divided by 20 to get 13

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Place the circles in order from the circle with the largest area to the circle with the smallest area.
11111nata11111 [884]

Answer:

Diameter 16, radius 7, circumference 37.68, diameter 8

Step-by-step explanation:

Largest area will be in a circle with the largest radius. So let's find all radii.

d = 8, so r = 4;

r = 7;

circumference = 2pi*r = 37. 68, so r = 6

diameter 18, so r = 8

5 0
3 years ago
Find the difference (5a^2+4ab-3b^2)-(-5ab+4b^2+3a^2)
Vesna [10]

Answer:

\boxed{\bold{2a^2+9ab-7b^2}}

Step By Step Explanation:

Remove Parenthesis: (a) = a

\bold{5a^2+4ab-3b^2-\left(-5ab+4b^2+3a^2\right)}

Simplify \bold{-\left(-5ab+4b^2+3a^2\right)}

\bold{5ab-4b^2-3a^2}

Rewrite Equation:

\bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}

Simplify \bold{5a^2+4ab-3b^2+5ab-4b^2-3a^2}

\bold{2a^2+9ab-7b^2}

- Mordancy

8 0
3 years ago
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Decide whether the statement is true or false. If it is​ false, explain why. The union of the solution sets of 4xplus5equals13​,
postnew [5]

The given statement is false because it isn't an empty set!

<u>Step-by-step explanation:</u>

We have following sets of inequalities:

4x+5=13\\4x+5>13\\4x+5

From 4x+5=13 we get ,

4x = 8 \\x=2

Therefore solution set is x=2.

Now, for 4x+5>13 we get ,  

4x+5>13 \\4x>8\\x>2

Therefore solution set is x>2.

For 4x+5 we get ,

4x+5

Therefore solution set is x<2.

Now, the union of x=2, x<2 & x>2 is  -∞<x<∞. i.e. all possible values of x. And so above statement is false because it isn't an empty set!

4 0
3 years ago
Whitch ordered pair is a solution of y&gt;5xx-2​
jenyasd209 [6]

Answer:

y = 5x - 2 (0, 2) (1, 4) (2, 7) (3, 13)

Step-by-step explanation:

7 0
3 years ago
Help needed ASAP!!!
horrorfan [7]

Answer:

Angle b = 30 degrees

Step-by-step explanation:

3x = 90.

X= 30

Angle b = 30 degrees

7 0
2 years ago
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