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SSSSS [86.1K]
3 years ago
10

Find the number of pens

Mathematics
1 answer:
Semenov [28]3 years ago
5 0
There are 44 pens in all
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How to solve this question
Viefleur [7K]

Answer:

7x+21 = 7x + 21

Step-by-step explanation:

7(x+3)=6-(-7x - 15)

L.H.S

=7(x+3)

=7x+21 (multiply 7 by (x+3))

R.H.S:

=6-(-7x - 15)

= 6+7x+15 (multiply the -ive sign in the bracket)

= 7x + 21 ( adding 15 and 6)

now compare the two sides

7x+21 = 7x + 21 hence we prove that L.H.S= R.H.S

4 0
3 years ago
Freya, a post office clerk, uses 2 yards, 1 foot, 7 inches of twine to wrap each damaged carton she repairs. She has to repair 1
sattari [20]
Per damaged carton the clerk uses 7 feet 7 inches of twine.
or
91 inched total.
multiply 91 times the amount of cartons needed (17) your answer is 1547
5 0
3 years ago
Read 2 more answers
The sum of the interior angles S of a polygon with n sides is given by the formula S = 180(n-2).
shusha [124]

Answer:

,

Step-by-step explanation:

4 0
3 years ago
Solve the system of equation by elimination. <br> 4x-3y=-21<br> 5x+3y=-6
Lena [83]

Answer:x=-3,y=3

or (-3,3)

Step-by-step explanation:

3 0
4 years ago
The results of a survey show that the percent of adults in a certain town who want to change the name of the town is in the inte
densk [106]
A) the middle of the range is 39.5% b) the difference between the middle and the ends of the range is ±1.5% c) less than a majority favor change. Change seems unlikely.
5 0
3 years ago
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