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3 years ago

((x+2)+1)^2 hasilnya?

1 answer:

7 0

((x + 2) + 1)^2
(x + 2 + 1)^2
(x + 3)^2
(x + 3)(x + 3)
x(x + 3) + 3(x + 3)
x(x) + x(3) + 3(x) + 3(3)
x^2 + 3x + 3x + 9
x^2 + 6x + 9

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Please help me with this problem

aev [14]

Answer: $\bold{b)\quad \dfrac{17\sqrt2}{26}}$

<u>Step-by-step explanation:</u>

$\text{Given }sin\ x=-\dfrac{5}{13}\quad \text{and is in Quadrant IV}\quad \implies\quad cos\ x=\dfrac{12}{13}\\\\\text{Use the cosine sum formula: }cos(A + B) = cosA\cdot cosB-sinA\cdot sinB\\\\\implies cos\bigg(x+\dfrac{\pi}{4}\bigg)=cosx\cdot cos\dfrac{\pi}{4}-sinx\cdot sin\dfrac{\pi}{4}\\\\\\=\dfrac{12}{13}\cdot\dfrac{\sqrt2}{2}-\bigg(-\dfrac{5}{13}\bigg)\cdot \dfrac{\sqrt2}{2}\\\\\\=\dfrac{12\sqrt2}{26}+\dfrac{5\sqrt2}{26}\\\\\\=\large\boxed{\dfrac{17\sqrt2}{26}}$

8 0

4 years ago

Read 2 more answers

Tickets to a local movie were sold at $6.00 for adults and $4.50 for students. If 110 tickets were sold for a total of $615.00,

meriva

Answer:

101 adults and 9 students

Step-by-step explanation:

4.50 * 2 = 9

6.00 * 101 = 606

606 + 9 = 615

3 0

3 years ago

18. Paul can type 60 words per minute and Jennifer can type 80 words per minute. How does Paul's typing speed compare to Jennife

Serggg [28]

Paul can type fast but 20 words less than Jennifer a minute.

8 0

4 years ago

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Joel says the number 63 is prime because it is an odd number. Is he correct? explain why or why not.

Anarel [89]

Answer:

63 is NOT a prime number

Step-by-step explanation:

It is not ONLY divisible by 1 and itself

6 0

3 years ago

Robert had some friends at his house after school. His mom cut up 2 pies for them to eat. If she cut each pie into fourths, how

marta [7]

Answer:

8/8

Step-by-step explanation:

There are two pies, and each one was cut into fourths. There are four fourths in a whole, and since there are two wholes, there are two four fourths (I don't know if this makes sense).

Basically, multiply how many fourths (four per pie) by how many pies there are.

4 x 2 = 8

There are 8 pieces.

6 0

2 years ago

Read 2 more answers