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balu736 [363]
3 years ago
10

Help me out please thanks

Mathematics
2 answers:
Soloha48 [4]3 years ago
4 0

Answer: Choice D is correct. The slope is 1.5

This means that for every hour, the temperature is increasing by 1.5 degrees Fahrenheit.

=======================================================

Work Shown:

slope = rise/run

slope = (change in y)/(change in x)

slope = (change in temperature)/(change in time)

slope = 6/4 .... see note below

slope = 3/2

slope = 1.5

note: The 6 refers to the jump from -2 to 4; the denominator 4 represents the amount of elapsed time from 8 AM to 12 PM

SVEN [57.7K]3 years ago
3 0

Answer:

1.5 is the correct answer

Step-by-step explanation:

The time it four hours. In those 4 hours the temperature changer by 6 degrees. So 6 divided by 4 is 1.5.

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Yenni is playing a card game where she is trying to collect on of each suit.There are 3 hearts 2 diamonds 1 spade and 4 clubs le
Gemiola [76]

Answer:

27/40

Step-by-step explanation:

Probability of picking heart: 3 hearts/ 10 total

Probability of picking club: 4 clubs/ 9 left over cards

3/10 divided by 4/9= 27/40

Hope this helped

Please mark Brainliest

So i can rank up

;p

8 0
3 years ago
A rectangular playground is 10m longer than it is wide.The area of the playground is 1400m² Calculate the width and length of th
Bezzdna [24]

Answer:

1400 = x(x+10)= x^2 +10x

We can rewrite this expression like this:

x^2 +10 x -1400 =0

And we can use the quadratic formula given by:

x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}

Where a =1 , b=10 , c= -1400

And replacing we got:

x = \frac{-10 \pm \sqrt{10^2 -4(10)(-1400)}}{2*1}

And solving we got:

x_1 =32.75 , x_2 = -42.75

And since the value can't be negative the answer would be x = 32.75 and the value of y = 32.75+10 =42.75

Step-by-step explanation:

For this case we know that we have a rectangular playground and the area can be founded with this formula:

A = xy

Where x represent the width and y the length. From the problem we know that A =1400 m^2 and the heigth is 10m longer than the wide so we can write this condition as:

y = 10 +x

And replacing this formula into the area we got:

1400 = x(x+10)= x^2 +10x

We can rewrite this expression like this:

x^2 +10 x -1400 =0

And we can use the quadratic formula given by:

x = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}

Where a =1 , b=10 , c= -1400

And replacing we got:

x = \frac{-10 \pm \sqrt{10^2 -4(10)(-1400)}}{2*1}

And solving we got:

x_1 =32.75 , x_2 = -42.75

And since the value can't be negative the answer would be x = 32.75 and the value of y = 32.75+10 =42.75

8 0
3 years ago
Read 2 more answers
Use the least common denominator to write an equivalent fraction for each fraction. 2 6 , 7 8 The least common denominator is 24
seraphim [82]

Answer:

2/6 = 48/144

7/8 = 168/192

Step-by-step explanation:

Use the least common denominator to write an equivalent fraction for each fraction. 2/6 , 7/8 The least common denominator is 24 .

2/6 can be rewritten as __

We Multiply both numerator and Denominator by 24

48/144

7/8 can be rewritten as __

We Multiply both numerator and Denominator by 24

168/192

8 0
3 years ago
2. the average battery life of 2400 manufactured cell phones is recorded
Cloud [144]

A Z-score helps us to understand how far is the data from the mean. The number of phones who have battery life in the range of 11.4 to 13 range is 1145.

<h3>What is Z-score?</h3>

A Z-score helps us to understand how far is the data from the mean. It is a measure of how many times the data is above or below the mean. It is given by the formula,

Z = \dfrac{X- \mu}{\sigma}

Where Z is the Z-score,

X is the data point,

μ is the mean and σ is the standard variable.

The percentage of phones who have battery life in the range of 11.4 to 13 range is,

P(11.4 < X < 13) = P(Z < \dfrac{13-13}{0.8}) - P(Z < \dfrac{11.4-13}{0.8})

                            = 0.50 - 0.0228

                            = 0.4772

Now, the number of phones who have battery life in the range of 11.4 to 13 range is,

Number of phones = 0.4772 × 2400 = 1145.28 ≈ 1145

Hence, the number of phones who have battery life in the range of 11.4 to 13 range is 1145.

Learn more about Z-score:

brainly.com/question/13299273

#SPJ1

3 0
2 years ago
why the fraction with a lesser denominator has larger pieces than the fraction with a greater denominator
saul85 [17]
Because that piece is divided into less pieces then the other piece.
7 0
3 years ago
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