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OLga [1]
3 years ago
14

Determine what to add to make the trinomial a perfect square. x2+8x+___

Mathematics
1 answer:
Nataly_w [17]3 years ago
6 0

Answer: 16

Step-by-step explanation:

For a perfect square each factor is identical.

Now, we have to find a number that adds to get 8.

The only option is (x+4)(x+4). When you distribute, you get x²+8x+16.

Now, we know that the missing number is 16.

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You have 31 coins consisting of nickels and
pychu [463]

Answer:

There are 14 dimes and 17 nickels.

Step-by-step explanation:

Let x be number of nickels and let y be number of dimes.

Given that the total is $2.25 and there are 31 coins, we know that:

0.05x +0.10y = 2.25

x+y = 31

Solving for x yields:

x=31-y

We then proceed by plugging that back into the previous equation:

0.05(31-y)+0.10y=2.25

1.55 - 0.05y +0.10y = 2.25\\ --> Distribute

1.55 +0.05y=2.25 --> add y's together

0.05y=0.7 --> subtract 1.55

y=14 --> divide by 0.05

Therefore, x must equal 17, which means you have 14 dimes and 17 nickels.

7 0
2 years ago
Please Help please please
nlexa [21]

Answer:

5.25

Step-by-step explanation:

Take the distance between the two points and divide by 2.

The distance between the two is 10.5 (9.1-(-1.4))

Divide by two to find the midpoint.

6 0
3 years ago
Read 2 more answers
Order these numbers from least to greatest.<br> 2.103, 2.1, 2.13, 2.1312
LiRa [457]

Answer:

2.1 , 2.103 , 2.13 , 2.1312

Step-by-step explanation:

Look at the first place, and see if it's the same, if it is, then you move to the next place. If the place is empty, fill it with a 0 and go from there.

5 0
3 years ago
Which product is greater than 3/4?
kenny6666 [7]

Answer:

first one

Step-by-step explanation:

all the others are lower than 3/4 or .75

6 0
3 years ago
A yard fabric costs $12.99. How much will 2 feet cost?
Angelina_Jolie [31]
8.66, you divide 12.99 into 3 and then multiply the result which is 4.33 by 2
3 0
3 years ago
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