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Zepler [3.9K]
3 years ago
8

How many different combinations of 3 books from a list of 10 recommended books?

Mathematics
1 answer:
AleksandrR [38]3 years ago
5 0

Answer:

10-3

=7

Step-by-step explanation:

i hope it wil help

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Four bells ring at intervals of 3, 7 , 12 and 14 minutes respectively. All four rang together at 4:00a.m. At what time will they
Vlada [557]
Basically ur just looking for the LCM (lowest common multiple) of all of these numbers.

3,7,12,14....lowest number that all 4 of these numbers go into evenly is 84.

so they will ring together next in 84 minutes (1 hr 24 minutes) making it 5:24 a.m.
8 0
3 years ago
The longest side of a triangle is 4 more than twice the shortest. The third side is 3 more than the shortest. The perimeter is 3
kondaur [170]

Answer:

The shortest side = 6

The third side = 9

The hypotenuse (the longest side) = 16

Step-by-step explanation:

First, let's establish the following based on the information given:

The shortest side = x

The third side = (x + 3)

The hypotenuse (the longest side) = (2x + 4)

The perimeter = 31

Since the perimeter is the total of all 3 sides, we are left with this equation:

(x) + (x + 3) + (2x + 4) = 31

From here, combine like-terms and solve for x.

(x) + (x + 3) + (2x + 4) = 31

(4x + 7) = 31

4x = 24

x = 6

Now that we know the value of x, we can apply this to the predetermined formulas to find the measurements of the remaining two sides.

The shortest side = 6

The third side = (x + 3) = 9

The hypotenuse (the longest side) = (2x + 4) = (2(6) + 4) = (12 + 4) = 16

To check, add all of the sides together to make sure they equal 31.

6 + 9 + 16 = 31

~Hope this Helps!~

7 0
3 years ago
Solve this equation.
Ymorist [56]

Answer:

A, B, and C

Step-by-step explanation:

The answer for 15.2+w=19.75+4.2 is <u>w=8.75</u>

3w=22.25+4 is <u>w=8.75</u>

The next equation is w= -8.75

The last equation is <u>w= 8.75</u>

4 0
3 years ago
Solve system of equation 4b-2d=5, -2b+d=1
Fed [463]

Answer:

no solution

Step-by-step explanation:

3 0
3 years ago
Noah plays football. His team's goal is to score
OleMash [197]

Answer:

No

Step-by-step explanation:

We can plug in the ordered pair (6,-1) into the equation. Remember that 6 is the x coordinate therefore we plug it in for x and that -1 is the y coordinate so we should plug it in for y.

6x+3y=6(6)+3(-1)=36-3=33

Since 33 is not equivalent to 15, (6, -1) is not a solution to the equation.

3 0
2 years ago
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