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lesantik [10]
3 years ago
12

There is a positive correlation between the number of times the Striped Ground Cricket chirps per second and the temperature in

degrees Fahrenheit. If a scatter plot is made with the number of chirps on the horizontal axis and the trend line is found to be y = 3x + 25, then what would you predict the temperature in degrees Fahrenheit to be when there are 20 chirps per second?
-1.6
85
135
Mathematics
2 answers:
Svetllana [295]3 years ago
8 0
I think the answer is 85 im not sure
ra1l [238]3 years ago
4 0

Answer:

85 °F


Step-by-step explanation:

The trend line equation is given by  y=3x+25

Where,

  • x is the number of chirps per second, and
  • y is the temperature in degrees Fahrenheit

We want to find the temperature when the number of chirps is 20. So we plug in 20 into x and figure out y :

y=3x+25\\y=3(20)+25\\y=60+25\\y=85

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Mario worked from 8:25 to 12:45 yesterday. Today
solmaris [256]

The number of hours he worked in all (written in fraction form) is 8\frac{1}{6} \ hours

From the question,

Mario worked from 8:25 to 12:45 yesterday.

From 8:25 to 12:45 gives 4 hours 20 minutes

Also, from the question,

Today  he will work from 11:20 to 3:10

From 11:20 to 3:10 gives 3 hours 50 minutes

To determine the number of hours he work in all, we will add the time spent working on the previous day to that of the current day. That is,

4 hours 20 minutes + 3 hours 50 minutes = 8 hours 10 minutes

Now, to put the answer in fraction form, we will convert 10 minutes to hours

NOTE: 60 minutes = 1 hour

∴ 10 minutes = \frac{10}{60} \ hours = \frac{1}{6} \ hours

∴ 8 hours 10 minutes = 8\frac{1}{6} \ hours

Hence, the number of hours he worked in all (written in fraction form) is 8\frac{1}{6} \ hours

Learn more here: brainly.com/question/3164396

6 0
2 years ago
Which has the same value as 1 5 tens?
Olenka [21]

The answer would be 150 as each ten bar is si worth 10 and 10x15=150.

8 0
3 years ago
If a ball is thrown directly upward with a velocity of 50ft/s, it's height (in feet) after t seconds is given by y=50t-16t^2 wha
Tomtit [17]

Answer:

39.0625 ft

Step-by-step explanation:

Since the function is a quadratic representing height, and the coefficient of the t² is negative, the vertex of the parabola will be the maximum height achieved by the ball.  

The general form for a quadratic equation is ax² + bx + c, here a is -16, and b is 50

To find the x coordinate of the vertex, use   x = -b/(2a)

We have x = -50/[2(-16)]

               

                  x = -50/-32

             

                         x= 25/16

Now plug that into the equation to find the y value, which will be the height...

y = 50(25/16) - 16(25/16)²

    y = 1250/16 - 16(625/256)

        y = 1250/16 - 625/16

              y = 625/16

                   y = 39.0625

7 0
3 years ago
18 of the 30 horses were blue what percent of the Horseshoe blue
Minchanka [31]
18 divided by 30 equals .6
0.6=60%
Hope this helps and please give brainliest!
6 0
3 years ago
Elsa wants to date 6 reindeer. How many and marry Sven. How may reinderr is there in total?
sveticcg [70]

Answer:

I'm guessing 7 reindeer

3 0
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