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Georgia [21]
3 years ago
5

Need help. PLEASE! I dont understand ​

Mathematics
1 answer:
nalin [4]3 years ago
5 0
Briana is wrong. The 2 line cannot be parallel since their slopes are not the same. The slope of one line is 2 and the slope of the other is 2.5.

The other student is right. Just replace (9, 21.5) in both equations and it will satisfy both equation.
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Mathematics in the london eye answers
san4es73 [151]
CENTRAL ANGLE: 
<span>There are 32 passenger cars, so you want an angle equal to 1/32 of the full circle. 
</span>
<span>The full circle in degrees is 360°, but you want radians. </span>
<span>The full circle in radians is 2π. </span>
<span>2π / 32 </span>
<span>= π/16 radians 
</span>
<span>ARC LENGTH </span>
<span>The arc length would be 1/32 of the full circumference. I know you already asked and got answers for the full circumference. Divide that by 32. 
</span>
<span>AREA OF SECTOR: </span>
<span>Ditto on this. You have the full area from a prior question. Now just divide it by 32</span>
6 0
3 years ago
A ball is thrown straight out at 80 feet per second from an upstairs window that's 15 feet off the ground. Find the ball's horiz
Alex73 [517]

Answer:

Step-by-step explanation:

In order to find the horizontal distance the ball travels, we need to know first how long it took to hit the ground. We will find that time in the y-dimension, and then use that time in the x-dimension, which is the dimension in question when we talk about horizontal distance. Here's what we know in the y-dimension:

a = -32 ft/s/s

v₀ = 0 (since the ball is being thrown straight out the window, the angle is 0 degrees, which translates to no upwards velocity at all)

Δx = -15 feet (negative because the ball lands 15 feet below the point from which it drops)

t = ?? sec.

The equation we will use is the one for displacement:

Δx = v_0t+\frac{1}{2}at^2 and filling in:

-15=(0)t+\frac{1}{2}(-32)t^2 which simplifies down to

-15=-16t^2 so

t=\sqrt{\frac{-15}{-16} } so

t = .968 sec (That is not the correct number of sig fig's but if I use the correct number, the answer doesn't come out to be one of the choices given. So I deviate from the rules a bit here out of necessity.)

Now we use that time in the x-dimension. Here's what we know in that dimension specifically:

a = 0 (acceleration in this dimension is always 0)

v₀ = 80 ft/sec

t = .968 sec

Δx = ?? feet

We use the equation for displacement again, and filling in what we know in this dimension:

Δx = (80)(.968) +(0)(.968)^2 and of course the portion of that after the plus sign goes to 0, leaving us with simply:

Δx = (80)(.968)

Δx = 77.46 feet

5 0
3 years ago
247÷10^2 and 247 ×10^2
Shalnov [3]
PEMDAS:
247/100 = 2.47
247* 100 = 24700
*You must ALWAYS apply the exponents first, THEN divide the equation.
7 0
3 years ago
Tim x: 3x(x-2) + 2(2-x)=0
olganol [36]

Answer:

Assuming this is the full problem.

3x^2-8x+4

Step-by-step explanation:

6 0
3 years ago
What is the mean in these numbers 50 60 80 90 100
Korolek [52]

Answer:

76

Step-by-step explanation:

<h2>MARK ME BRAINLIEST PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ</h2>
8 0
3 years ago
Read 2 more answers
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