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2 years ago

If

Mathematics

1 answer:

Anna11 [10]2 years ago

4 0

Answer: -104

Explanation: x=-9 y=2
2(y-3xy)
=2(2-3(-9)(2))
=4-2(3(-18))
=4-108
=-104

Hope it helped

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Alice has 12 more trees in her garden than Stephen has. After Stephen planted 10 more trees and Alice dug out 4, together they h

Dafna1 [17]

Answer:

Stephen has 9 trees

Alice has 21 trees

Step-by-step explanation:

<u>At the beginning:</u>

Stephen = x trees

Alice = x + 12 trees

Alice = (x + 12) - 4 trees

Stephen = x + 10 trees

Total = 36

Then

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Stephen - 9 trees

Alice - 9 + 12 = 21 trees

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3 years ago

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Step-by-step explanation: Got it right Edgenuity

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Answer:

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Help stuck on methods question

andreev551 [17]

Answer:

x=3

Explanation:

Let's write an equation for the area of this figure.

This figure can be divided into 2 rectangles, a vertical and horizontal rectangle.

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Area of vertical rectangle= 6x

Length of horizontal rectangle= (7 -x) cm

Area of horizontal rectangle= x(7-x)

Since total area= 30 cm^2,

6x+ x(7-x)= 30

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3 years ago

What is the rate of change of the perimeter of the square at the instant the area is 49 m2?

vagabundo [1.1K]

Let x = the length of a side of the square (m).
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A = x²
The perimeter is
P = 4x

The rate of change of P with respect to x is
P'(x) = 4 (independent of x)

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Answer: 4

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