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Lesechka [4]
3 years ago
9

Find the value of c that makes each trinomial a perfect square. Then write the trinomial as a perfect square.

Mathematics
1 answer:
musickatia [10]3 years ago
3 0

Answer:

d. c = 100; (x – 10)²

Step-by-step explanation:

Note that (x+a)²=x²+2ax+a².

In our case, 2a=-20, so 'a' must be -10.

Since c=a², and a=-10, c=(-10²)=100.

Since a=-10, the perfect square is (x – 10)²

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Can someone explain this or help me plss .
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Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Explain how you can use doubles when multiplying with 4 to find 4x8
STALIN [3.7K]
You can figure out what four times eight is by adding eight and eight(16) and doubling it (32)
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3 years ago
If Fun Reads Bookstore has a ready club with a $40 fee and charges $5 per book and Cool Covers Bookstores club charges $100 fee
choli [55]

Answer:

You have to buy more than 20 books to make Cool Cover Bookstore club a better deal.

Step-by-step explanation:

Given that:

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Let x be the number of books.

A(x) = 5x+40

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B(x) = 2x+100

For making Cool Cover Bookstores club a better deal,

B(x) > A(x)

2x+100 > 5x+40

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\frac{-3x}{-3}>\frac{-60}{-3}\\x>20

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8 0
3 years ago
In a function, y varies inversely with x. The consistent of variation is 4. Which table could represent the function?
lianna [129]

Answer:

none of the tables shown

Step-by-step explanation:

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xy = k where k is the constant

xy = 4

in the top table

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In the middle table

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In the bottom table

-2 *4 = -8 so it is not the bottom table

There must be a table not shown

5 0
3 years ago
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sergij07 [2.7K]
1/5 less than janelle
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3 years ago
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