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4 years ago

Lizzie method 9x cubed +12x squared -45x like I can't find the calculator I use in class help??

Mathematics

1 answer:

Oduvanchick [21]4 years ago

3 0

the correct answer would be -24x because 9+12 is 21 and 21 - 45 would be -24

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-5y y=-2 -3x 6y=-12 substitution

IrinaK [193]

The answer would be x=4 and y=-2.

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3 years ago

Help me I need to graduate

Naily [24]

Answer:

(-2, 3)

Step-by-step explanation:

A is translated from (5, 1) to A' at (6, -2).

That is, it moves one unit to the right and three units down.

B is also translated to B' one unit to the right and three units down to (-1, 0).

B must be one unit to the left and three units above B'.

Thus, the coordinates of B are (-2, 3).

The diagram below shows the translation of side AB of ∆ABC to its new location at A'B'.

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3 years ago

Change 1/7 / 4/21 to a ratio?

sergeinik [125]

Answer:

3:4

Step-by-step explanation:

(1/7)/(4/21) = (1/7)×(21/4) = 3/4 = 3:4

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3 years ago

Find the maxmium area of a rectangular plot of land which can be enclosed by rope of length 60 metres

mario62 [17]

Answer:

225 m²

Step-by-step explanation:

If W is the width of the rectangle, and L is the length, then:

60 = 2W + 2L

A = WL

Use the first equation to solve for one of the variables:

30 = W + L

L = 30 − W

Substitute into the second equation:

A = W (30 − W)

A = 30W − W²

This is a parabola, so we can find the vertex using the formula x = -b/(2a).

W = -30 / (2 × -1)

W = 15

Or, we can use calculus:

dA/dW = 30 − 2W

0 = 30 − 2W

W = 15

Solving for L:

L = 30 − W

L = 15

So the maximum area is:

A = WL

A = (15)(15)

A = 225

3 0

3 years ago

The price of a visit to the dentist is \$50$50. If the dentist fills any cavities, an additional charge of \$100$100 per cavity

kenny6666 [7]

Answer:300

Step-by-step explanation:

um i dk know if the two 50$ means any thing but thats what i got

7 0

3 years ago