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Delvig [45]
3 years ago
15

Use the multiplication method to solve the following systems of equations. 1. 4q – 2r = 36 and 6q + r = 10

Mathematics
1 answer:
sasho [114]3 years ago
7 0

Answer: r = -11, q =3.5

Step-by-step explanation:

4q – 2r = 36  ....... eqn. 1

6q + r = 10 ..............eqn 2.

from eqn. 2 make r subject formula i.e.

r = 10- 6q   (substitute for 'r' in eqn. 1)

we have;

4q - 2(10-6q) = 36 (open bracket)

4q -20 + 12q = 36 (collect like terms)

4q+12q = 36+20

16q = 56

q = 56/16

q = 3.5

substitute for q in eqn. 2.......

6(3.5) + r = 10

21 + r = 10

r = 10-21

r = -11, q =3.5

Please give me brainliest...thanks

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In the united states a person ears more than 40,000 pounds of bread in a lifetime if he or she lives to be 80 years old.Does thi
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Answer:

A reality check quickly reveals that even if "eats" were spelled properly, the statement would still be nonsense.

Step-by-step explanation:

(40,000 pounds / 80 years) = (4,000 pounds / 8 years) = 500 pounds per year

500 pounds of bread per year = an average of a little more than 1-1/3 pound of bread per day, every day of a person's life.  My reality meter says that this is a bit much, especially in the USA.

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2 years ago
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3 years ago
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emmasim [6.3K]

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Step-by-step explanation:

7 0
3 years ago
Find the value of 5y-11 given that -5y=-45
Vlada [557]

Answer:

34

Step-by-step explanation:

-5y=-45

y=-45/-5

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6 0
3 years ago
Read 2 more answers
Fourteen less children’s meals were served than adult meals at a barbecue. Children plate were 1.50 each and adult plates were 2
Annette [7]

Answer:

134 children and 120 adult plates were served

Step-by-step explanation:

let the children mean be x

Let the adult meal be y

If fourteen less children’s meals were served than adult meals at a barbecue, then;

y = x - 14 .... 1

IF Children plate were 1.50 each and adult plates were 2.00 each with a total of 441 in amount then;

1.5x + 2y = 441 .... 2

Substitute 1 into 2;

1.5x + 2(x-14) = 441

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Hence 134 children and 120 adult plates were served

7 0
2 years ago
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