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Marrrta [24]
3 years ago
6

Solving a word problem with two unknowns using a linear equation

Mathematics
1 answer:
liberstina [14]3 years ago
6 0

Answer:

350

Step-by-step explanation:

629= A+S

A-71 = S

629 = A+A-71

700=2A

A=350

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An omelette costs $1.50 more than Mario's order of pancakes. After treating his family to breakfast, Mario is sure that 4 omelet
masha68 [24]
The other answer here, by Nicholasrichar, has the correct answers,
but it's a pain to follow through step-by-step because of the formatting
problem.  Here's my solution, leading to the same answers:

P = cost of pancakes
cost of omeletto, = P+1.50

4 omelettes = 4P + 6
3 pancakes = 3P

Total cost of food = 7P + 6
After 7% tax         = 1.07(7P + 6)
After tip                = 1.07(7P + 6) + 3.50

Eliminate parentheses:  1.07(7P) + 1.07(6) + 3.50 =
                                        7.49P    +    6.42  + 3.50  = 

Total cost of breakfast:        7.49P + 9.92 .

Having a "range" between $25 and $40 is really two inequalities:

First inequality:    $25 < 7.49P + 9.92

Subtract 9.92 from each side:  15.08 < 7.49P

Divide each side by 7.49:          $2.013 < P

An order of pancakes costs more than $2.01 .


Second inequality:    7.49P + 9.92 < $40

Subtract  9.92 from each side:  7.49P < 30.08

Divide each side by  7.49 :              P < $4.016

An order of pancakes costs less than $4.02.

The price range of an order of pancakes is   $2.01 < Pancakes < $4.02 .

7 0
3 years ago
Read 2 more answers
Yan is climbing down a ladder. Each time he descends 4 rungs on the ladder, he stops to see how much farther he
almond37 [142]

Answer:

A. 4+4+4+4 ...............

4 0
3 years ago
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Furkat [3]

Answer:

y=-1/39

Step-by-step explanation:

(42y+7)-(3y+6)

(39y+7)-(6)

(39y)=-1

y=-1/39

6 0
3 years ago
about 10% of the general population are left-handed. If you survey 370 students in a school, about what number can you expect to
steposvetlana [31]
Well, to get the answer, we just divide 370 by 10.
370 divided by 10 = 37
So, the answer is 37
Hope this helped >.<
4 0
3 years ago
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Can some one answer these pls
ss7ja [257]

Answer:

1=8, 2=7, 3=

Step-by-step explanation:

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3 years ago
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