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jarptica [38.1K]
3 years ago
13

PLZ HELP!!!! A newspaper reports the following changes in the temperature of a city over 4 days: 2.64 degrees Celsius, negative

2 over 9 degrees Celsius, −0.35 degrees Celsius, 5 over 8 degrees Celsius Write an expression to show the average daily change in the temperature of the city. Write the steps to solve the expression. Round your answer to the nearest hundredth.
Mathematics
1 answer:
boyakko [2]3 years ago
6 0

Answer:

hi pls help me

Step-by-step explanation:

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List three values that would make this inequality true
mina [271]

Answer:

1, 2, 3

Step-by-step explanation:

solve the inequality by dividing both sides by 2, hence

n ≤ 3

3 = 3 and 1, 2 < 3

hence 1, 2 and 3 all make the inequality true


7 0
3 years ago
Consumer Reports indicated that the average life of a refrigerator before replacement is 14 years with a standard deviation of 2
guajiro [1.7K]

Answer:

a.) Average life of a refrigerator

b.) 0.1151

c.) 0.0548

d.) 0.6472225

Step-by-step explanation:

Given that :

Average life before replacement, mean, m = 14 years

Standard deviation, σ = 2 years

A.)

The random variable is the variable which is being measured.

B.) What is the probability that someone will keep a refrigerator fewer than 11 years before replacement?

Fewer than 11 years, P(x < 11)

We need to obtain the Z probability, at P(Z < 11)

The Zscore = (x - mean) / standard deviation

Zscore = (11 - 14) / 2.5 = - 1.2

P(Z < - 1.2) = 0.1151

C.) What is the probability that someone will keep a refrigerator more than 18 years before replacement?

More than 18 years, P(x > 18)

We need to obtain the Z probability, at P(Z > 18)

The Zscore = (x - mean) / standard deviation

Zscore = (18 - 14) / 2.5 = 1.6

P(Z > 1.6) = 0.0548

D.) What is the probability that someone will replace a refrigerator between 8 and 15 years?

P(x < 8)

The Zscore = (x - mean) / standard deviation

Zscore = (8 - 14) / 2.5 = - 2.4

P(Z < - 2.4) = 0.0081975

P(x < 15)

The Zscore = (x - mean) / standard deviation

Zscore = (15 - 14) / 2.5 = 0.4

P(Z < 0.4) = 0.65542

P(Z < 0.4) - P(Z < - 2.4)

0.65542 - 0.0081975 = 0.6472225

5 0
4 years ago
A 25-foot ladder leans against a wall. The base of the ladder is 15 feet from the bottom of the wall. How far up the wall does t
motikmotik

Answer: 20 feet.

Step-by-step explanation:

Observe the right triangle attached.

You need to find the value of "x".

Then, you can use the Pythagorean Theorem:

a^2=b^2+c^2

Where "a" is the hypotenuse of the triangle, and "b" and "c" are the legs.

 In this case, you can identify that:

a=25ft\\b=15ft\\c=x

Substitute these values into  a^2=b^2+c^2:

 (25ft)^2=(15ft)^2+x^2

Now, you need to solve for x to find how far up the wall the top of the ladder reaches. Then you get:

x^2=(25ft)^2-(15ft)^2

x=\sqrt{(25ft)^2-(15ft)^2}

x=20ft

3 0
4 years ago
Read 2 more answers
2. Vera is half as old as Chuck. Write an expression in terms of x that represents her<br> age.
Mariulka [41]

Answer:

y=x1/2

Step-by-step explanation:

y = Vera

x = Chuck

5 0
3 years ago
I NEED HELP FAST!!!<br> What is the distance between 14,-15 and 10,-7
kenny6666 [7]

Answer:

8.94 units

Step-by-step explanation:

Distance formula The distance between two points with coordinates

(14,-15) and (10,-7) round to nearest 100th

4 0
2 years ago
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