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irinina [24]
3 years ago
15

Solve the system by the substitution method. 7x + y = -6 7x - 3y = 18

Mathematics
2 answers:
Elodia [21]3 years ago
7 0

Answer:

Stdivise 7 aep-by-step explanation:

Yuri [45]3 years ago
3 0

Answer:

Step-by-step explanation:

7x + y = -6

y = -7x - 6

7x - 3y = 18

7x - 3(-7x - 6) = 18

7x + 21x + 18 = 18

7x + 21x = 18 - 18

28x = 0

x = 0/28

x = 0 <=========

7x + y = -6

7(0) + y = -6

0 + y = -6

y = -6 <==========

solution is : (0,-6)

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A basketball is 11 times as heavy as a tennis ball. If a tennis ball weighs 58 grams, what is the weight of a basketball in kilo
Vlada [557]

Answer:

0.638 KGs or 638 grams

Step-by-step explanation:

as we know 1000grams = 1 kilogram

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11*58/1000 = 0.638 KGs

8 0
2 years ago
If, in 7 years, Susan will be 2 times as old as she was 3 years ago, what is Susan’s present age? PLEAZE EXPLAIN HOW AND DO IT W
belka [17]
Let Susan's present age be x

Now, after 7 years ( her age will become 7 +x then) she'll be 2 as old she was 3 years ago.

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Now according to question,

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5 0
3 years ago
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The selling price of a dinner table is $250, the markup is 40%. What is the cost of the table
kvv77 [185]
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5 0
3 years ago
Consider the graph below:
ladessa [460]

Answer:

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4 0
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Hi, i need help on his maths questions<br> Thanks to anyone that helps me :D
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Answer:

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