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Dimas [21]
3 years ago
13

Chandra bought twice as many plants as Marvin. Kira bought 1/3 as many plants as Chandra. Marvin bought 6 plants. Write an expre

ssion that shows the total number of plants purchased. Who bought the most plants?

Mathematics
2 answers:
IRISSAK [1]3 years ago
6 0

Answer:

Chandra bought the most plants

Step-by-step explanation:

We have three persons buying different number of plants.

Chandra bought twice as many as Marvin. Since Marvin bought 6 plants, this mean Chandra bought 6 * 2 = 12 plants

Kira bought 1/3 of what Chandra bought, that means she bought 1/3 * 12 = 4 plants

Expression for the total number of plants purchased is : total number of plants purchased = 4 + 12 + 6 = 22 plants

Chandra bought 6 so she bought the most plants

Pavlova-9 [17]3 years ago
3 0

Step-by-step explanation:

Below is an attachment containing the solution.

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The y-intercept is where the graph goes through the y-axis (the vertical line in the center). It goes through at y=-9, so the coordinates would be (0,-9), since it is (x,y).

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The ratio of Sam's age to Hank's age is 5 to 3. If the sum of their ages is 24, how old is Hank?
posledela
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3 years ago
Bethany needs to solve the equation -x^2 + 4x = x - 4.
notsponge [240]

Answer:

The system of equations she could write is:

   y = -x² + 4x

   y = x - 4

The solutions are (-1 , -5) and (4 , 0)

Step-by-step explanation:

-x² + 4x = x - 4

That means two equations one quadratic which is in the left hand side and the other is linear which is in the right hand side.

They represented graphically by a parabola and a line, the solution of it will be the points of intersection of the two graphs

To find the system of equations take each side and equate it by y

∵ y = -x² + 4x

∵ y = x - 4

∴ The system of equations is:

   y = -x² + 4x

   y = x - 4

Let us solve this system using -x² + 4x = x - 4

∵ -x² + 4x = x - 4

- Subtract x from both sides

∴ -x² + 3x = -4

- Add 4 to both sides

∴ -x² + 3x + 4 = 0

- Multiply both sides by -1

∴ x² - 3x - 4 = 0

Let us use the factorization to solve it

∵ x² = (x)(x)

∵ -4 = (1)(-4)

∵ (x)(1) = x

∵ (x)(-4) = -4x

∵ x + -4x = - 3x ⇒ middle term

∴ The factors of x² - 3x - 4 are (x + 1)(x - 4)

- Substitute x² - 3x - 4 by its factors

∴ (x + 1)(x - 4) = 0

Equate each factor by 0 to find the values of x

∵ x + 1 = 0

- Subtract 1 from both sides

∴ x = -1

∵ x - 4 = 0

- Add 4 to both sides

∴ x = 4

Substitute the values of x in the equation y = x - 4 to find y

∵ y = -1 - 4

∴ y = -5

∵ y = 4 - 4

∴ y = 0

The solutions are (-1 , -5) and (4 , 0)

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Answer:

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Step-by-step explanation:

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8 tens and 3 ones.


hope that helped
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