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Brrunno [24]
3 years ago
5

Select the polynomial that is a perfect square trinomial.

Mathematics
1 answer:
Andre45 [30]3 years ago
5 0
(a\pm b)^2=a^2\pm2ab+b^2


a)\ 49x^2-8x+16=(7x)^2-2\cdot x\cdot4+4^2-NOT\\\\b)\ 4a^2-10a+25=(2a)^2-2\cdot a\cdot5+5^2-NOT\\\\c)\ 25b^2-5b+10=(5b)^2-5b+10-NOT\\\\d)\ 16x^2-8x+1=(4x)^2-2\cdot4x\cdot1+1^2=(4x-1)^2-YES!

\text{Answer: d)}

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Simplify this algbraic expression completely 5y-3(y+2)
Sophie [7]

Answer:

2y - 6

Step-by-step explanation:

5y - 3(y + 2)

distribute

5y + (-3 * y) + (-3 * 2)

simplify

5y -3y + ( -3 * 2)

5y - 3y + ( -6)

5y - 3y - 6

combine like terms

5-3 = 2

2y - 6

3 0
3 years ago
simon makes 30 cakes gives 1/5 of the cakes to sali. He gives 10% of the 30 cakes to jane what fraction of the fake cakes does h
dexar [7]

Total number of cakes made by Simon = 30 cakes.

Number of cakes gave to Sali = 1/5 Of total cakes = 1/5 * 30 = 6 cakes.

Number of the cakes gave to Jane = 10% of 30 cakes

10% can be written as 10/100 in fracions and in decimals it would be 0.10.

Therefore, 10% of 30 cakes = 0.10 times 30 = 3 cakes.

Total number of cakes left = Total cakes made - Cakes gave to Sali - Cakes gave to Jane = 30-6-3

Therefore, Total number of cakes left = 21.

21 cakes left our of 30 cakes.

21 out of 30 could be written in fracion form as 21/30.

We can reduce this fracion in simplest form by dividing top and bottom by 3, we get

7/10.

Therefore, 7/10 fraction of the cakes does he have left.

8 0
3 years ago
PLZZ help with this!!!!
murzikaleks [220]

Answer:

2x² + 15x + 27

Step-by-step explanation:

(2x + 9)(x+3)

2x² + 6x + 9x+ 27

2x² + 15x + 27

6 0
3 years ago
Read 2 more answers
A dozen cookies needs 2.5 cups of flours. How much flour is needed for 4.5 dozen cookies ?
ki77a [65]
11.25 cups of flour

2.5 x 4 = 10
2.5/2 = 1.25
10 + 1.25 = 11.25
5 0
3 years ago
The total bill for dinner, before tax, in $36.00. If you leave a 20% tip, will you will leave a tile of $_____.
qaws [65]

Answer:

After the tip you would leave $43.20

Step-by-step explanation:

In order to find this, we must first find 20% of 36. In order to do that, you must multiply them together (don't forget to turn the percentage into a decimal first).

36 * .20 = 7.20

Now we can add the total amount pre-tip and the tip amount to find the overall total.

$36 + $7.20 = $43.20

8 0
3 years ago
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