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rosijanka [135]
3 years ago
9

HELP ASAP RIGHT NOW PLEASE

Mathematics
1 answer:
Makovka662 [10]3 years ago
6 0

Answer:

X=7

X=2

Step-by-step explanation:

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Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard devia
lesya692 [45]

Answer: P(x > - 0.23) = 0.41

Step-by-step explanation:

Since we are assuming that the readings at freezing on a batch of thermometers are normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = the readings at freezing on a batch of thermometers.

µ = mean temperature reading

σ = standard deviation

From the information given,

µ = 0°C

σ = 1.00°C

the probability of obtaining a reading less than -0.23°C is expressed as

P(x > - 0.23)

For x = - 0.23

z = (- 0.23 - 0)/1 = - 0.23

Looking at the normal distribution table, the probability corresponding to the z score is 0.41

7 0
3 years ago
How do you combine like terms of -8(r-2) + 6(r-2) ??? Will mark brainliest if the answer is right.
solmaris [256]

Answer:

-2r+4

Step-by-step explanation:

-8(r-2)+6(r-2)

Distribute:

(-8)(r)+(-8)(-2)+(6)(r)+(6)(-2)\\-8r+16+6r+-12

Combine like terms:

(-8r+6r)+(16+-12)\\-2r+4

-2r + 4 is your answer.

6 0
3 years ago
I need helpppp plsssss
podryga [215]

9514 1404 393

Answer:

  • 33, 27
  • 285

Step-by-step explanation:

The price difference is found by subtracting Emma's price from DeShawn's price. Each price is the product of the number of square feet and the price per square foot.

The number of square feet is already given in the answer form, so you only need to fill in the per square foot prices. Those are found in the table. Both the window name and the window area give clues as to which is the right price to choose.

The expression is (4² × 33) - (3² × 27).

__

For the second fill-in, you need to actually do this arithmetic. For many calculators, you can enter this expression directly.

DeShawn paid $285 more for his window than Emma.

5 0
3 years ago
He spent $___ on gas?
Basile [38]

Answer:

Step-by-step explanation: 15 minus 6.2 is 8.8 thats how much he needs to fill upp if it is 3.50 a gallon you would multiply to get 30.8 thats how much money he spent on gas

7 0
3 years ago
What is the key idea of this passage ​
Luda [366]
You have to insert the passage first
7 0
3 years ago
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