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ladessa [460]
3 years ago
12

Kira is solving the equation 3(2x + 5) - (5x - 2) = 42. Her steps are shown below.

Mathematics
1 answer:
stich3 [128]3 years ago
6 0

Answer:

D)2

the minus sign outside the bracket when multiplied by a negative number in the bracket is equal to a positive number

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U/4 = 8/3<br><br>Round your answer to the nearest tenth.<br><br>u=____
rodikova [14]
Find a common denominator (12).

u/4=8/3
3u/12=32/12
Multiply each side by twelve to get rid of the denominator.
3u=32
u=1 2/3
1 and two-thirds equals 1.6666666 in decimal form, so the nearest tenth would be 1.7

4 0
3 years ago
Need help quiiickkkk
OLEGan [10]

Answer:

100 beats per minute

Step-by-step explanation:

If it takes 28.8 secs for the piano to play 48 beats, then it would take 60 secs (1 minute) to play x number of beats.

To find the value of x, which is the number of beats the piano makes per minute, let's set the proportion as shown below:

28.8 secs = 48 beats

60 secs = x beats

Cross multiply

28.8*x = 60*48

28.8x = 2,880

Divide both sides by 28.8

x = 2,880/28.8

x = 100

✅Thus, if the Piano plays 48 beats in 28.8 secs, therefore, the tempo of the piano in beats per minute would be 100 BPM

7 0
3 years ago
​
pashok25 [27]

Answer:

Let's call:

f = price of 1 cup of dried fruit

a = price of 1 cup of almonds

In order to build the linear system, you need to consider that the total price of a bag is given by the sum of the price of cups times the number of cups in each bag, therefore:

Solve for a in first equation:

a = (6 - 3f) / 4

Then substitute in the second equation:

41/2 f + 6 · (6 - 3f) / 4 = 9

41/2 f + 9 - 9/2 f = 9

16 f = 0

f = 0

Now, substitute this value in the formula found for a:

a = (6 - 3·0) / 4

  = 3/2 = 1.5

Hence, the cups of dried fruit are free and 1 cup of almond costs 1.5$

Step-by-step explanation:

8 0
2 years ago
What is m Help Please
olga_2 [115]
I don't know I forgot
3 0
3 years ago
Read 2 more answers
Please help on this will mark the first answer brainliest
vova2212 [387]

Answer:

The equation is 3n + 13 = 40 The triplets are 9 years old

Step-by-step explanation:

5 0
3 years ago
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