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zalisa [80]
3 years ago
10

The sum of Sabrina's age and twice her sister's age is equal to their mom's age. If Sabrina's sister is two years older than her

and their mom is 37, how old is sabrina?
Mathematics
1 answer:
swat323 years ago
6 0

Sabrina is 11 years old.

Step-by-step explanation:

Let,

Sabrina's age = x

Her sister's age = y

Her mother's age = z

According to given statement;

The sum of Sabrina's age and twice her sister's age is equal to their mom's age.

x+2y=z     Eqn 1

If Sabrina's sister is two years older than her

y = x+2     Eqn 2

their mom is 37

z = 37      Eqn 3

Putting value of y and z from equation 2 and 3 in Eqn 1

x+2(x+2)=37\\x+2x+4=37\\3x=37-4\\3x=33

Dividing both sides by 3

\frac{3x}{3}=\frac{33}{3}\\x=11

Sabrina is 11 years old.

Keywords: linear equation, division

Learn more about linear equations at:

  • brainly.com/question/11680012
  • brainly.com/question/11705002

#LearnwithBrainly

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A school allots £3000 to spend on a trip to the theatre. Theatre tickets have a regular cost of £40 each and are on offer for 1
Bumek [7]

Answer:

£36

Step-by-step explanation:

From the question, we are told that School allots £3000 to spend on a trip to the theatre. With regular cost of tickets of £40 each with offer for 1/5 off

Then the cost of each ticket with 1/5 off= (4/5×40)= £32

From the question, A train ticket for the day will cost £20 each.

Then total cost for each of it = £32+£20

=£52

To determine how much money that the school will have left over, If 3 teachers and the maximum number of students attend, can be expressed below by first calculating the number of students.

Let us denote the number of students as "x"

52(x+3)= < 3000

52x + 156 =< 3000

52x =< 3000 - 156

52x =< 2844

X =< 2844/52

s =< 54.69,

The max. Number of students is 54

Total number of people= Number of students + the 3 teachers

= 54+3= 57

Total cost for 57 people= (£52 × 57 people)= £2964

The amount of money the school will have as left over = (£3000 - £2964)

= £36

8 0
3 years ago
Find the zeros of the function.
rodikova [14]

Answer:

5 and -5

Step-by-step explanation:

Replace y with 0 and solve for x

3 0
3 years ago
Read 2 more answers
The numbers of cars (c) in the parking lot increases when the parking fee (f) decrease. Write the correct equation for this scen
vodka [1.7K]
So when one goes up, the other goes down. This is an inverse equation.

An inverse equation looks like this: y = 1/x

In this case, when parking fee (f) decreases, cars (c) increase.
You know which side to put each variable on using the chart they gave you.
f         | c
20.00  15        (20.00 = x/15) x=300
30.00  10        (30.00 = x/10) x=300

So your equation in this case is f = 300/c
Knowing that, plug in the fee of 6.00

6 = 300/c   Multiply both sides by c.
6c = 300    Divide both sides by 6.
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1. 7:4 = 21:x; what is the value of x?<br> A. 12<br> B. 10<br> C. 8<br> D. 6<br> E. 4<br> 8.
Soloha48 [4]

Answer:

x = 12

I hope it's helps you

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Mrs. Travis wants to have a clown deliver balloons to her secretary's office. Clowns R Fun charges $ 1.25 per balloon and $ 6 de
choli [55]
Let C be Clowns R Fun charge for b balloons and S be Singing Balloons charge.
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6 0
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