(please pleaseee help. I screenshot the question and choices )

Answers

Answer 1

Answer: the answer is yes, 1:1,4

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Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.A rocket is launched from atop a 76-foot cliff with an initial velocity of 135 ft/s.
A.) Substitute the values into the vertical motion formula h=-16t^2+vt+c. Let h=0
B.) Use the quadratic formula find out how long the rocket will take to hit the ground after it is launched. Round to the nearest tenth of a second.
1.)0= -16t^2 + 135t + 76; 0.5 s
2.)0= -16t^2 + 135t + 76; 9 s

Answers

A ) h = -16 t² + 135 t + 76
Let : h = 0
0 = - 16 t² + 135 t + 76
B ) t 1/2 = (-b+/- √ ( b² - 4 ac ) / ( 2 a )
t 1/2 = (-135 - √(18,225 + 4,864))/ (-32) = ( - 135 - 151.95) / (- 32)=
= (-286.95) / (- 32) = 9.967 ≈ 9.0 s ( other solution is negative )
Answer:
2) 0 = -16 t² + 135 t + 76; 9 s

Answer:

The answer is 2.) $0=-16t^(2)+135t+76;9 s$

Step-by-step explanation:

Given initial velocity=135 ft/s

& cliff=76 foot

Given quadratic equation

$0=-16t^(2)+vt+c$

⇒ $0=-16t^(2)+135t+76$ (let h=0 it is given)

⇒ $t=(-135\pm\sqrt ((135)^(2)-4(-16)(76)))/(2(-16))$

⇒ $t=(-135\pm151.951)/(-32)$

⇒ t=8.96≈9 s (the other root is negative)

Hence, rocket will take 9 s to hit the ground after launched.

How do I evaluate x+y=10

Answers

Hi there! Evaluate means to solve so we are going to solve x+y=10. Add both sides to -y, x+y+-y=10+-y=X=-y+10. Therefore, the answer is x=-y+10

The sides of a triangle measures 6 inches, 8 inches, and 10 inches. The triangle has one 90° angle. What type of triangle is it?

Answers

A Right Scalene Triangle

90 degrees angle means the triangle is a right angle and all the sides arent the same so it is also scalene
Hope this helped

A number n plus 7 is less than or equal to 9

Answers

Final answer:

The subject of this question is Mathematics. The inequality n + 7 ≤ 9 can be solved by subtracting 7 from both sides. The solution is n ≤ 2.

Explanation:

The subject of this question is Mathematics. The question involves solving an inequality involving a number, n, that is added to 7 and is less than or equal to 9. To find the possible values of n, we can subtract 7 from both sides of the inequality:

n + 7 ≤ 9

n ≤ 9 - 7

n ≤ 2

So, the values of n that satisfy the inequality are any number less than or equal to 2.

Learn more about Solving Inequalities here:

brainly.com/question/26855203

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Of the 2,500 light bulbs produced in one hour at General Lighting, 75 were defective. What percent of the light bulbs were defective?