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cestrela7 [59]
3 years ago
6

How do I do this? It’s just find the x.

Mathematics
2 answers:
algol133 years ago
6 0

Answer:

100+x=180(Linear pair)

x=180-100

x=80°

sergey [27]3 years ago
4 0

Answer:

98 degrees.

Step by step explanation:

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A ball is projected upward from the ground. Its distance in feet from the ground in t seconds is given by s left parenthesis t r
julia-pushkina [17]

Answer:

t = 5.46 secs and t = 2.42 secs

Step-by-step explanation:

The distance of the ball from the ground is given by:

s(t) = -16t^2 + 126t

When the ball is at a distance 211 ft from the ground, that means s(t) = 211 ft. we need to find t:

211 = -16t^2 + 126t

=> 16t^2 -126t + 211 = 0

Using the quadratic formula:

t = \frac{-b + \sqrt{b^2 - 4ac} }{2a} and t = \frac{-b - \sqrt{b^2 - 4ac} }{2a}

where a = 16, b = 126 and c = 211

Hence:

t = \frac{-(-126) + \sqrt{(-126)^2 - 4(16)(211)} }{2(16)}     and          t = \frac{-(-126) - \sqrt{(-126)^2 - 4(16)(211)} }{2(16)}

t = \frac{126 + \sqrt{15876 - 13504} }{32}                     and           t = \frac{126 - \sqrt{15876 - 13504} }{32}

t = \frac{126 + \sqrt{2372} }{32}                                and           t = \frac{126 - \sqrt{2372} }{32}

t = \frac{126 + 48.703 }{32}                                and           t = \frac{126 - 48.703 }{32}

t = \frac{174.703}{32}                                     and           t = \frac{77.297}{32}

=> t = 5.46 secs and t = 2.42 secs

This means that the ball will be at 211 feet at two different times, first, after 2.42 seconds and then after 5.46 seconds.

This makes sense because the ball is projected upwards, which means that when going up, it attains 211 feet and also, when coming back down, it also attains 211 feet.

6 0
3 years ago
1/2 + (-1/4)=????????????
erica [24]

Answer:

\frac{1}{4}

Step-by-step explanation:

\frac{1}{2} = \frac{2}{4}  We need a common denominator before we can add.

\frac{2}{4} + \frac{-1}{4}  means the same thing as

\frac{2}{4} - \frac{1}{4} = \frac{1}{4}

5 0
2 years ago
FREE POINTS! Also will mark Brainliest for the most detailed explanation.
Alexxandr [17]

Answer:

209,000

Step-by-step explanation:

(500+200=700)

(700*300=210000)

210000-1000=209,000

4 0
3 years ago
Read 2 more answers
Having trouble with this one help appreciated
Hoochie [10]

Answer:

The constant of proportionality is 3.50.

Step-by-step explanation:

We know that when y directly varies with x, such that

y=kx

The number 'k' is called the constant of proportionality.

Given the equation

y=3.50x

as

y=kx

so

k=3.50           ∵ y=kx

Here the value of k = 3.50, which is the constant of proportionality.

Therefore, the constant of proportionality is 3.50.

4 0
3 years ago
Write the equation of the line that is perpendicular to the line 8y−16=5x through the point (5,-5).
disa [49]

Answer:

y = -(8/5)x + 3

Step-by-step explanation:

Step 1:  Rewrite the given equation into slope-intercept form by solving for y

8y−16=5x

 

   8y = 5x + 16

 

      y = (5/8)x + 2

Perpendicular lines have slopes that are opposite reciprocals of each other.  That means you take the slope, flip the fraction, and change the sign.

Here our given line is y = (5/8)x + 2 so the slope 5/8

The opposite reciprocal of 5/8 is -8/5

We set up the equation

y = -(8/5)x + b      

  we are given a point (x, y) of (5, -5), so plug that in and solve for b

-5 = -(8/5)(5) + b

    -5 = -8 + b

     3 = b  

So our equations is  y = -(8/5)x + 3

4 0
3 years ago
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