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2 years ago

Since it's 4 questions ill give yall 50 points to whoever answers. <

Mathematics

2 answers:

bonufazy [111]2 years ago

7 0

Answer: 7 is 3 8 is 8 9 is 2 and 10 is 12

Step-by-step explanation

bored

CaHeK987 [17]2 years ago

6 0

Step-by-step Solutions:

Question 7:

√9
=> √3 × 3
=> 3

Question 8:

√64
=> √8 × 8
=> 8

Question 9:

√4
=> √2 × 2
=> 2

Question 10:

√144
=> √12 × 12
=> 12

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I really need help with this Triangle problem.

julia-pushkina [17]

Answer:

x = 10

y = 20

Step-by-step explanation:

$\tan \: 30 \degree = \frac{x}{10 \sqrt{3} } \\ \\ \frac{1}{ \sqrt{3} } = \frac{x}{10 \sqrt{3} } \\ \\ \sqrt{3} x = 10 \sqrt{3} \\ \\ x = \frac{10 \sqrt{3} }{ \sqrt{3} } \\ \\ x = 10 \\ \\ \cos 30 \degree = \frac{10 \sqrt{3} }{y} \\ \\ \frac{ \sqrt{3} }{2} = \frac{10 \sqrt{3} }{y} \\ \\ y = 10 \sqrt{3} \times \frac{2}{ \sqrt{3} } \\ \\ y = 10 \times 2 \\ \\ y = 20$

4 0

2 years ago

Find the (real-valued) general solution to the differential equation. z′′+5z′=0

andrew-mc [135]

Try this solution:1. to make up the characteristic equation:α²+5α=0; $\left[\begin{array}{ccc} \alpha=0 \\ \alpha =-5\\\end{array}$ 2. to make up the final answer:y=C₁+C₂e⁻⁵ˣ

7 0

2 years ago

5x-3y=-11 x-2y=2 this is for home work please help

ale4655 [162]

5x - 3y = 11 ⇒ 5x - 3y = 11 ⇒ 5x - 3y = 11
x - 2y = 2 ⇒ -5(x - 3y) = 2 ⇒ -5x + 15y = 2
 12y = 13
 12 12
 y = 1 1/12
 5x - 3(1 1/12) = 11
 5x - 3 1/4 = 11
 +3 1/4 +3 1/4
 5x = 14 1/4
 5 5
 x = 2 17/20
 (x, y) = (2 17/20, 1 1/12)

8 0

3 years ago

Solve the equation 4n2 − 16n − 84 = 0 by completing the square.

melomori [17]

4n² - 16n - 84 = 0

Multiply both sides by 1/4 :

n² - 4n - 21 = 0

Add 21 to both sides:

n² - 4n = 21

Complete the square by adding 4 to both sides:

n² - 4n + 4 = 25

(n - 2)² = 25

Solve for n :

n - 2 = ± √25

n - 2 = ± 5

n = 2 ± 5

Then n = 2 + 5 = 7 or n = 2 - 5 = -3.

8 0

2 years ago

What is equivalent to 5:2

kozerog [31]

Answer:

2.5:1 or 2.5

Step-by-step explanation:

5/2 ÷ 2 would give you 2.5/1 or 2.5

3 0

3 years ago