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2 years ago

Gabrielle's age is three times Mikhail's age. The sum of their ages is 20. What is Mikhail's age?

2 answers:

5 0

You can convert this problem into an equation.
3x + x = 20
When simplified, the problem is 4x = 20
You can easily solve for x, which is 5.
Mikhail’s age is 5 years old.
Can I have brainliest?

PtichkaEL [24]2 years ago

4 0

Answer:

Mikhail is 5 years old

Step-by-step explanation:

Represent each member with a variable.

X= Gabrille

Y=Mikhail

X+Y=20 (sum of their ages is 20)

X=3y (Gabrille is 3 times Mikhails age)

Substitute 3Y into the first equation (simultaneous equation)

. 3y+y=20

. 4y=20 (divide both sides by 4)

y=5

To check your answer.

X+5=20

X=20-5

X=15

15 is 5 times 3.

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Slav-nsk [51]

Answer:

$y - 35 = 6(x - 5)$

Step-by-step explanation:

The point-slope equation of a line is

$y - y_1 = m(x - x_1)$ ,

where

$m = slope = \dfrac{y_2 - y_1}{x_2 - x_1}$

and the point is

$(x_1, y_1)$

Let's find the slope.

$m = slope = \dfrac{-31 - 35}{-6 - 5}$

$m = \dfrac{-66}{-11}$

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We are asked to use the first point in the equation, so

$x_1 = 5$ and $y_1 = 35$

The equation is:

$y - 35 = 6(x - 5)$

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3 years ago

Gia got some books from Library yesterday she got five books today Gia returned three books Gia has six books how many books did

makvit [3.9K]

Answer: 4

Explanation:

You can write an algebraic expression to represent the sequence with the books in this way:

yesterday she got five books: 5
today returned three books: - 3
how many books did Gia have to begin: n
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n + 5 - 3 = 6

Now you follow these steps to clear the unknown:

do the operations in the left side: n + 2 = 6
use subtraction property of equality: n = 6 - 2
do the operations: n = 4

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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