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vfiekz [6]
3 years ago
8

Hurry pls help!

Mathematics
1 answer:
babunello [35]3 years ago
6 0

Answer: Early in the race, Alberto runs faster. He maintains a speed of 20 km/h, as Bianca running speed ??increases??. The first person to cross the finish line is Bianca.

Step-by-step explanation:

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the perimeter of a rectangle is 34inches. the width of the rectangle is 5 inches. What is the length of the rectangle?
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The length is 12 inches long
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George filled 10 mugs with coffee. Each mug had 240\text{ mL}240 mL240, start text, space, m, L, end text of coffee. How many li
goldenfox [79]

Answer:

2.4 Liters

Step-by-step explanation:

1,000

1

​

 L1, start text, space, m, L, end text, equals, start fraction, 1, divided by, 1, comma, 000, end fraction, start text, space, L, end text

So, 2,400 mL

​

 

=2,400 mL×

1,000 mL

1 L

​

=

1

2,400

mL

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×

1,000

mL

1 L

​

=

1,000

2,400 L

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=2,400 L÷1,000

=2.4 L

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4 0
3 years ago
Read 2 more answers
Complete the square 3x^2+12x=15
barxatty [35]

Step-by-step explanation:

3 {x}^{2}  + 12x = 15 \\ 3 ({x}^{2}  + 4x) = 15 \\  {x}^{2}  + 4x = 5 \\  {x}^{2}  + 4x  = 5 \\  {x}^{2}  + 4x + 4 = 5 + 4 \\ {x}^{2}  + 4x + 4 = 9 \\ {x}^{2}  + 4x +  {2}^{2}  =  {3}^{2}  \\ \red{ \bold{ (x + 2)^{2}   =  {3}^{2}}}  \\

3 0
3 years ago
In a bowl of fruit there are 10 bananas, 6 apples and 4 pears.
kobusy [5.1K]

Answer:

P(0,0) = 2/12 times 1/11 = 1/66

Step-by-step explanation:

For probability questions, think of each event happening separately, it makes the maths easier to understand. For example, in this question, do not think of the two boys taking a fruit at the same time - that makes the maths complicated

.

Let Daniel take a fruit first, then Sean can take a fruit. There are two parts to consider.

P

r

o

b

a

b

i

l

i

t

y

=

number of desirable outcomes

total number of possible outcomes

For Daniel: there are 12 different pieces of fruit in the bowl, he just takes one without choosing a specific fruit. (random)

The chance that Daniel takes an orange is

2

12

Of the 12 pieces of fruit. 2 are oranges.

Now Sean: the numbers of fruit in the bowl have changed. There are now only 11 pieces of fruit in the bowl, and only 1 is an orange.

The chance that Sean takes an orange is

1

11

4 0
3 years ago
A grocery store recently changed their apple supplying vendor. The vendor told the store manager that the mean weight for each a
yarga [219]

Answer:

b) 0.0042495

c) 0.048021

Hence, the probability of the mean weight that the 10 apples exceeds 8.2 ounces of this customer wil be higher than the last customer in part b because the number of random samples in part b is greater that that in part c

Step-by-step explanation:

mean of 7.5 ounces and a standard deviation of 1.33 ounce

When random number of samples are given, we solve using z score with the formula

= z = (x-μ)/σ/√n, where

x is the raw score

μ is the population mean

σ is the population standard deviation.

n is the random number of samples

(a) One customer comes to this grocery store and randomly picks 25 apples. What is the mean and standard deviation of the distribution of the mean weight for 25 apples?

(b) What is the probability that the mean weight of 25 apples exceeds 8.2 ounces?

x > 8.2 ounces

= z = (x - μ)/σ/√n

z = (8.2 - 7.5)/1.33/√25

z = (8.2 - 7.5)/1.33/5

z = 2.63158

Probability value from Z-Table:

P(x<8.2) = 0.99575

P(x>8.2) = 1 - P(x<8.2) = 0.0042495

(c) Another customer randomly picks 10 apples. Will the probability of the mean weight that the 10 apples exceeds 8.2 ounces of this customer be higher than the last customer in part b?

For n= 10

x > 8.2 ounces

= z = (x - μ)/σ/√n

z = (8.2 - 7.5)/1.33/√10

z = 1.66436

Probability value from Z-Table:

P(x<8.2) = 0.95198

P(x>8.2) = 1 - P(x<8.2) = 0.048021

Hence, the probability of the mean weight that the 10 apples exceeds 8.2 ounces of this customer wil be higher than the last customer in part b because the number of random samples in part b is greater that that in part c

4 0
3 years ago
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