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mina [271]
3 years ago
13

Perform the indicated operation. (-9 + 21) - (-12 + 4) =

Mathematics
1 answer:
Trava [24]3 years ago
6 0

Answer:

29

Step-by-step explanation:

-9+21= 21

-12+4=-8

21-(-8)=29

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A lion’s heart beats 12 times in 16 seconds.how many heartbeats will it have in 60 seconds?
Sergio [31]
Hey there!

Here is your answer:

<u><em>The proper answer to this question is "44 times".</em></u>

Reason:

You have to solve it this way:

<u><em>12 heartbeats=16 seconds</em></u>

<u><em>16+16=32</em></u>
<u><em>36+16=48</em></u>
<u><em>48+16=64</em></u>
<u><em>16-12=4</em></u>
<u><em>12+12=36+8=44</em></u>

<em>Therefore lions heart beats 44 times every 60 seconds.</em>

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit
6 0
3 years ago
Side length of cube with volume of 729 ft
navik [9.2K]
The answer is 9, hope this helped <3
6 0
3 years ago
Is(5, 6)a solution to the inequality<br> y &lt; 2x + 4 ?
Diano4ka-milaya [45]

Answer:

yes

Step-by-step explanation:

y < 2x +4

6 < 2·5 +4

6 < 14

4 0
3 years ago
What is the surface area of this triangular prism
const2013 [10]
The perimeter of the triangular end is 12 m, so the total rectangular area is
.. (12 m)*(8 m) = 96 m^2

There are two triangles with base 3 m and height 4 m, so their total area is
.. (3 m)*(4 m) = 12 m^2

The surface area of the figure is the sum of these 
.. 96 m^2 +12 m^2 = 108 m^2
6 0
3 years ago
If y = 2 and x = 5, Then solve<br> 3x + 4 + 2y<br> A 20<br> B 61<br> C 23<br> D 0
Arisa [49]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
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