3 years ago

(x) 3 5 7 (y) 7 11 15 Find x, when y = 21

Mathematics

1 answer:

solniwko [45]3 years ago

3 0

Answer:

x = 10

Step-by-step explanation:

y = 2x + 1

21 = 2x + 1

21 - 1 = 2x

2x = 20

x = 10

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Anna is a teacher at an elementary school. She purchased 73 tickets to take the first-grade children and some parents on a field

Svetllana [295]

She bought 54 child tickets and 19 adult tickets.

Step-by-step explanation:

No. of tickets purchased = 73

Cost of tickets = $771

Cost of one child ticket = $9

Cost of one adult ticket = $15

Let,

Child ticket = x

Adult ticket = y

According to given statement;

x+y=73 Eqn 1

9x+15y=771 Eqn 2

Multiplying Eqn 1 by 9;

$9(x+y=73)\\9x+9y=657\ \ \ Eqn\ 3\\$

Subtracting Eqn 3 from Eqn 2;

$(9x+15y)-(9x+9y)=771-657\\9x+15y-9x-9y=114\\6y=114\\$

Dividing both sides by 6;

$\frac{6y}{6}=\frac{114}{6}\\y=19$

Putting y=19 in Eqn 1

$x+19=73\\x=73-19\\x=54\\$

She bought 54 child tickets and 19 adult tickets.

Keywords: linear equations, subtraction

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago

Brandon bought a baseball on for $15.00. He had a coupon for a 20% discount. How much did Brandon pay for the baseball?

IRINA_888 [86]

Brandon payed $12.00. So C.

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in the last election, 1,200 people in the precinct voted. the ratio of men to omen was 3 to 5. how many of the voters were women

AysviL [449]

3+5=8

1200 voters

1200/8 = 150

Female: 5 x 150 = 750 voters

Male: 3 x 150 = 450 voters

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3 years ago

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She can make 1.6 batches

Step-by-step explanation:

24/15 = 1.6

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