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Mashcka [7]
3 years ago
13

Which placement of grouping symbols in the expression gives it a value of 14?     6 • 4 – 4 + 9 – 3   A. 6 • (4 – 4 + 9) – 3   B

. 6 • 4 – [4 + (9 – 3)]   C. (6 • 4 – 4) + (9 – 3)   D. 6 • [(4 – 4 + 9) – 3]
Mathematics
1 answer:
STatiana [176]3 years ago
6 0
<em>the correct option is B...
6 . 4 - [4 + (9 - 3)]
= 6 . 4 - [4 + 6]  BY SOLVING ( 9 - 3 )
= 6 . 4 - 10    BY SOLVING [ 4 + 6 ]
= 24 - 10
= 14     ANSWER ...:)

</em>
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Tara's music teacher requires students to practice their instrument at least 9 hours each week. Tara usually spends 2.5 hours pr
geniusboy [140]

Answer:

She will need to practice 6.5 hours during Tuesday, Wednesday, and Thursday or 2.2 hours on each of the days she will practice.

Step-by-step explanation:

8 0
3 years ago
Rod is paid $85 to install a screen door and $115 to install a wooden door. In one week he installed 18 doors and was paid a tot
Rainbow [258]

Answer:Rod installed  7 screen doors

Step-by-step explanation:

Step 1

Let the number of screen door = x

And the number of wooden doors = y

since he installed 18 doors , we have that

screen door + wooden doors = 18

x + y = 18------ equation 1

Also the cost to install a screen  door -= $85

and to install a wooden door = $115

And he was therefore paid a total of $1850

Therefore

85x + 115 y = $1860------- equation 2

Step 2----- Solving

x + y = 18------ equation 1

85x + 115 y = $1860------- equation 2

Multiplying equation 1 BY 85

85x + 85y= 1530------- equation 3

85x + 115 y = $1860------- equation 4

subtracting from equation 1 from (2)

115y- 85y= 1860-1530

30y=330

y = 330/30 = 11

To find x

x+ y=18

x= 18-y

x= 18-11= 7

Rod installed  7 screen doors and 11 wooden doors.

8 0
3 years ago
−2/3​p+1/5​−1+5/6​p, Combine Like Terms.
posledela

Answer will be

p/6  − 4/5

5 0
4 years ago
santosh is four more than three times the age of his cousin. if santosh is 49 years old, then what is the age of his cousin?
andrezito [222]
Santosh's cousin is 15 years old because 49-4=45. Divide 45 by 3 and the quotient is 15. To check: 15 times 3= 45. Add 4 and the sum is 49.
8 0
4 years ago
3x+2 (5x+4)=47 can you show the work
andrew11 [14]
<span>3x+2 (5x+4)=47

47- 4 = 43

43/5= 8.6

8.6-2= 6.6

6.6/3= 2.2

2.2 <-- answer</span>
7 0
4 years ago
Read 2 more answers
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