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AleksandrR [38]
3 years ago
6

A girl is x years old and her brother is 5 years older than her. (1) Find the sum of their ages. (2) If their father is 25 years

older than the girl, what is the difference between the zum of yhe children's age and their fathers age
Mathematics
1 answer:
Valentin [98]3 years ago
6 0

1) Sum = x + (x+5) = 2x + 5 years

2) Difference = 2x + 5 - (x + 25) = 2x + 5 - x - 25 = x -20

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Use simultaneous equations to solve the following. Three kilograms of jam and two kilograms of butter cost $29 and six kilograms
artcher [175]

Answer:

The cost of 1kg jam is $7 and the cost of 1kg butter is $4

Step-by-step explanation:

Let jam = x

butter = y

3x + 2y = 29 -----(1)

6x + 3y = 54 -----(2)

(1)×2 ->

6x + 4y = 58 -----(3)

(3)-(2) ->

y = 4

suby=4into(2)

6x + 3(4) = 54

6x = 42

x = 7

(Correct me if i am wrong)

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According to the statement

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Linear regression is the most basic and commonly used predictive analysis. Regression estimates are used to describe data and to explain the relationship.

And

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2 years ago
There are 45 red tiles,25 blue tiles and 30 green tiles in a bag.
Mazyrski [523]
This is a question of probability.
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3 years ago
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The answer would be $22.68!

If Andy bought 3 paintbrushes for $1.75 each, then we just multiply how much they cost by the number that the bought.

1.75 x 3 = 5.25

If Andy bought 7 tubes of oil paint, we just do the same thing we did in the first step! Multiply how much they cost by the number that the bought.

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