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2 years ago

Please helppp Probability Maths

Mathematics

1 answer:

Ber [7]2 years ago

3 0

Answer:

16/40 = 0.4

Step-by-step explanation:

Find total marbles then divide the number of green by total.

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Solve for x. 5x - 1 = 26 x = 27/5 x = 5 x = -5

yan [13]

5x = 26 + 1
5x = 27
x = 27/5

Answer: A) or the first option ✅

4 0

3 years ago

the credit remaining on a phone card in dollars is a linear function of the total calling time made with the card in minutes. Th

Advocard [28]

Answer:

he credit remaining on a phone card (in dollars) is a linear function of the

total calling time made with the card (in minutes), as shown in the figure below.

The remaining credit after 45 minutes of calls is $22.80 , and the remaining

credit after 64 minutes of calls is $19.76.

What is the remaining credit after 73 minutes of calls?

;

Not sure what figure you are referring to, write an equation from the given values:

Assign the values as follows

x1 = 45; y1 = 22.80

x2 = 64; y2 = 19.76

Find the slope (m) using the formula: m = %28y2-y1%29%2F%28x2-x1%29

m = %2819.76-22.80%29%2F%2864-45%29 = %28-3.04%29%2F%2819%29

m = -.16

Write the equation using the point/slope formula: y - y1 = m(x - x1)

y - 22.80 = -.16(x - 45)

y - 22.80 = -.16x + 7.2

y = -.16x + 7.2 + 22.80

y = -.16x + 30

;

Use this equation to find the credit (y) when minutes (x) = 73

y = -.16(73) + 30

y = -11.68 + 30

y = $18.32; credit after 73 minute of calls

That you can also see the original value of the phone card: x=0, y = $30

;

Did this help you understand what's going on here? Any questions

Step-by-step explanation:

8 0

2 years ago

The value of x is? What is the value of x in this problem?

snow_lady [41]

Answer:

$x=96$ °

Step-by-step explanation:

For the upper left angle, we know that they are supplementary, so we can find the first angle of the triangle by

$180-130=50$

For the bottom right angle, we know that they are supplementary, so we can find that angle by

$180-134=46$

As a triangle has 180 degrees, we can subtract the values of the other two angles to find the final upper right angle.

$180-50-46=84$

Lastly, The upper right angle and x are supplementary so we can find x by subtracting the angle from 180

$180-84=x\\x=96$

5 0

2 years ago

Read 2 more answers

In 2007, there were more than 8.14 million cars for sale. Over the next 3 years, the number of cars decreased by 23%. Write an e

Nina [5.8K]

Answer:

c = 8.14 million×(0.9166)^t

4.83 million

Step-by-step explanation:

Data:

t = y - 2007

c₀ = 8.14 million

c₃ = 23 % less than c₁

Part 1. Calculate c₃

c₃ = c₀(1 - 0.23) = 0.77c₀

Part 2. Calculate r

c₃ = c₀r^t

0.77c₀ = c₀r³

0.77 = r³ Divided each side by c₀

r = 0.9166 Took the cube root of each side

The explicit decay model is c = 8.14 million×(0.9166)^t

Part 3. Prediction

t = 2013 - 2007 = 6

c = c₀r^t = 8.14 million×(0.9166)⁶ = 8.14 million × 0.5929 = 4.83 million

The model predicts that there will be 4.83 million cars for sale in 2013.

7 0

3 years ago

The value of y varies directly with x. If x = 2, then y = 10. What is the value of x when y = 100? *

Fynjy0 [20]

Answer:

Step-by-step explanation:

y=kx

X=2 & y= 10

10=2k

k=5

when y=100

100=5x

X=20

8 0

3 years ago