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3 years ago

Given that x = 5 and y = 9, evaluate the expression using -4xy - 6x2 + 2x2y - 6y

Mathematics

1 answer:

Damm [24]3 years ago

4 0

Answer:

Step-by-step explanation:

Put the numbers in place of the corresponding variables and do the arithmetic.

-4(5)(9) -6(5)^2 +2(5)^2(9) -6(9) = -180 -150 +450 -54 = 66

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sue makes 2% commission sales up to $5000. She makes 7.5% commission on sales over $5000. If Sue sold $15000 worth of merchandis

ikadub [295]

Answer:

$1125

Step-by-step explanation:

Since $15,000 is over $5000 the commission is 7.5%

Next you turn the percent into a decimal:

0.075

Now multiply $15,000 by 0.075

Answer = $1125

3 0

2 years ago

in the northen hemisphere the ratio of tye area of the water is 2:3 work out the percentage of tge area of the northen hemispher

labwork [276]

Answer:

40%

Step-by-step explanation:

l2:w3 means that the fraction of land is 2/5.

time 2/5 by 20, you get 40/100

convert 40/100 into percentage is 40%

5 0

2 years ago

Mapping congruent Triangles

Snezhnost [94]

The answer is b so mark it down

7 0

3 years ago

Read 2 more answers

On paper, make a rectangle that has points A and B as two of its vertices and has a perimeter of 40 units. Draw and label the tw

Westkost [7]

Answer:

$A(x,y),B(x+10,y),C(x+10,y-10) \:and\: D(x,y-10)$

Step-by-step explanation:

If a Rectangle has a perimeter of 40 units, then we can write that formula and find the a formula for the coordinates:

$\left\{\begin{matrix}w+l=20 & \\ w*l=100 & \end{matrix}\right.\Rightarrow w=20-l\Rightarrow (20-l)l=100\Rightarrow -l^2+20l-100=0\Rightarrow l^2-20l+100\Rightarrow (l-10)(l-10)\Rightarrow l=10\therefore l=10\: and\: w=10$

Therefore we can say:

$A(x,y),B(x+10,y),C(x+10,y-10) \:and\: D(x,y-10)$

Technically when $w=l$ in this rectangle is a square, a degenerate square.

8 0

3 years ago

Samantha needs to bake at least 120 pot pies to sell at her restaurant. she can bake 12 pot pies per hour and 15 veggie pot pies

Veronika [31]

Answer:

y>(line under >) - 4/5x + 8

Step-by-step explanation:

Phrase "at least" indicates that the total number of pies is greater than or equal to 120.

The number of chicken pot pies Samantha makes is 12x, and the number of veggie pot pies she makes is 15y.

Use this information to create the inequality:

12x + 15y >(line under >) 120

Simplify by solving for y to get this inequality:

y >(line under >) - 4/5x + 8

3 0

2 years ago