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ICE Princess25 [194]
3 years ago
15

(9x-9)(9×+9), your finding the difference between two squares. im have some trouble in how to solve it.​

Mathematics
1 answer:
sergejj [24]3 years ago
8 0

Answer: Your answer is 0 (F.O.I.L) first. outer. inner. last. Or you could use what my teacher calls the magic box

Step-by-step explanation:

So for the boxes you multiply for example the top left box you multiply the 9 above it and the 9 to the left or like the top right box you multiply the -9 above it and the 9 on the outside of the box to the left

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RoseWind [281]
Provide more info. And I would love to help
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3 years ago
Yolanda's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Yolanda $5.20 per pound, and t
MAXImum [283]

Answer:

78 pounds

Step-by-step explanation:

Let's say Yolanda makes a pounds of Type A coffee and b pounds of Type B coffee. Since the total number of pounds is 130, we can write the equation:

a + b = 130

We know the cost of Type A coffee is $5.20/lb and the cost of Type B coffee is $4.05/lb, so since the total cost is $586.30, we can write:

5.20a + 4.05b = 586.30

We can now solve the system of equations:

a + b = 130

5.20a + 4.05b = 586.30

Manipulate the first equation by subtracting b from both sides:

a + b = 130

a = 130 - b

Substitute 130 - b for a in the second equation:

5.20a + 4.05b = 586.30

5.20 * (130 - b) + 4.05b = 586.30

676 - 5.20b + 4.05b = 586.30

Move the terms with b to one side:

1.15b = 89.70

b = 78

Thus, Yolanda used 78 pounds of Type B coffee.

<em>~ an aesthetics lover</em>

7 0
2 years ago
Draw a picture in the space in the right to show how you would find 1/2 of 8 marbles
777dan777 [17]
Simply present that you would split them up as a factor of two. ( make two lines going either vertically or horizontally. place in varriations, a marble in one line and a marble in the other and then count the leftover
7 0
3 years ago
Find all roots x3^-8=0
Travka [436]

Answer:

Step-by-step explanation:

hello :

x3^-8=0  means : x3^=8

but : 8 = 2^3

so : x3^= 2^3

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7 0
2 years ago
I need help
marysya [2.9K]

Answer: Company C

Step-by-step explanation:

A: $150

B: $160

C: $140

D: $170

So Company C has the best rate.

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