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alexandr402 [8]
2 years ago
11

3a−28−7a=10a what is a?

Mathematics
2 answers:
Ilia_Sergeevich [38]2 years ago
7 0
Answer:
A=-2

Hope this helps
nirvana33 [79]2 years ago
3 0

Answer:

A= -2

Step-by-step explanation:

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What is the fraction and decimal
vfiekz [6]
The fraction is 1/15 and the decimal is 1.15
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3 years ago
for the opening day of a carnival, 800 admission tickets were sold. The receipts totaled $3775. Tickets for children cost $3 eac
zloy xaker [14]
Total tickets sold  = 800
Total revenue = $3775

Ticket costs:
$3  per child,
$8  per adult,
$5 per senior citizen.

Of those who bought tickets, let
x =  number of children 
y = number of adults
z = senior citizens

Therefore
x + y + z = 800                   (1)
3x + 8y + 5z = 3775           (2)

Twice as many children's tickets were sold as adults. Therefore
x = 2y                                (3)

Substitute (3) into (1) and (2).
2y + y + z = 800, or
3y + z = 800, or
z = 800 - 3y                        (4)
3(2y) + 8y + 5z = 3775, or
14y + 5z = 3775                 (5)

Substtute (4) nto (5).
14y + 5(800 - 3y) = 3775
-y = -225
y = 225
From (4), obtain
z = 800 - 3y = 125
From (3), obtain
x = 2y = 450

Answer:
The number of tickets sold was:
450 children,
225  adults,
125 senior citizens.
6 0
3 years ago
Help me with this question (Picture)
RoseWind [281]
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3 years ago
A baseball has a 48 cm diameter. What is the volume of the contents of the ball?
Andrew [12]

Answer:

201cm

Step-by-step explanation:

6 0
2 years ago
Please provide the working outs as well as the answer. Many thanks
lana [24]
\dfrac{3w-5}{2}=w-3\ \ \ |multiply\ both\ sides\ by\ 2\\\\\not2^1\cdot\dfrac{3w-5}{\not2_1}=2\cdot w-2\cdot3\\\\3w-5=2w-6\ \ \ |add\ 5\ to\ both\ sides\\\\3w-5+5=2w-6+5\\\\3w=2w-1\ \ \ \ |subtract\ 2w\ from\ both\ sides\\\\3w-2w=2w-2w-1\\\\\boxed{w=-1}

4 0
3 years ago
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