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Dvinal [7]
3 years ago
15

Mr Smith can do 10 jumping jacks in 8 seconds. At this rate, how many jumping jacks can he do in 12 seconds? Show your work.

Mathematics
1 answer:
jekas [21]3 years ago
6 0

Answer:

10 Jumping Jacks

Step-by-step explanation:

8÷10=0.8

0.8x12=9.6

9.6 rounded to the nearest tenth is 10.0.

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4(k+1)=k+10,then 3k=<br><br>A. 3/2<br>B.5/2<br>C. 2<br>D. 6​
nasty-shy [4]

Solution:

<u>Note that:</u>

  • Given equation: 4(k + 1) = k + 10
  • To find: 3k

<u>Simplifying the LHS:</u>

  • 4(k + 1) = k + 10
  • => (4 x k) + (4 x 1) = k + 10
  • => 4k + 4 = k + 10

<u>Subtracting k and 4 both sides:</u>

  • 4k + 4 - k - 4 = k + 10 - k - 4
  • => 3k = 6 (No further solution required)

The value of 3k is 6.

3 0
3 years ago
6:
schepotkina [342]

Answer:

$52.5

Step-by-step explanation:

Whenever there is a sales tax of a certain percentage, you need to first convert that percentage to decimal. 5%=0.05, and multiplying this by the overall price gives 0.05*50=$2.5. Adding this to the initial price of $50, you get 50+2.5=$52.5. Hope this helps!

4 0
3 years ago
Read 2 more answers
What is a = 1/2 (b-c) if b is the subject
natulia [17]

Answer:

b = 2a + c

Step-by-step explanation:

Given

a = \frac{1}{2} (b - c)

Multiply both sides by 2 to clear the fraction

2a = b - c ( add c to both sides )

2a + c = b

5 0
3 years ago
1 hour is equal to how many seconds
AURORKA [14]

Answer: 3600 seconds

Step-by-step explanation:

60 seconds in a minute

60 minutes in an hour

(60)(60) = 3600

4 0
3 years ago
Read 2 more answers
Which is the directrix of a parabola with equation x2 = 8y?
olga_2 [115]

Answer:

Y=-2

Step-by-step explanation:

You would use the vertex form to find the directrix

4 0
3 years ago
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