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Fiesta28 [93]
3 years ago
8

How many solutions does the system have? { y = − 3 x + 9 3 y = − 9 x + 9 ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ y=−3x+9 3y=−9x+9 ​

Mathematics
1 answer:
Mumz [18]3 years ago
7 0

Answer:

Step-by-step explanation:

I cant see the full equation

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Find the measures of the numbered angles in rhombus ABCD.
lions [1.4K]

Answer:

∠1 = 66°

∠2 = 24°

∠3 = 24°

∠4 = 90°

Step-by-step explanation:

∠1 = 90 - 24 = 66°

∠2 = 24°

∠3 = 24° because segment DB bisects ∠ABC

∠4 = 90° because it is a right angle

7 0
3 years ago
In a random sample of 40 refrigerators, the mean repair cost was $150. Assume the population standard deviation is $15.50. Const
Mama L [17]

Answer:  ($143.69, $156.31)

Step-by-step explanation:

Confidence interval to estimate  population mean :

\overline{x}\ \pm z\dfrac{\sigma}{\sqrt{n}}

, where \sigma = population standard deviation

n= sample size

\overline{x}= Sample mean

z= critical value.

As per given,

n= 40

\sigma = $15.50

\overline{x}= $150

Critical value for 99% confidence level = 2.576

Then, 99% confidence interval for the population mean:

150\pm(2.576)\dfrac{15.50}{\sqrt{40}}\\\\\Rightarrow\ 150\pm6.31  \ \ (approx)\\\\\Rightarrow(150-6.31,150+6.31)=(143.69,156.31)

Hence, the required confidence interval : ($143.69, $156.31)

6 0
4 years ago
The linear model y equal 0.6 x plus 45 represents the number of pairs of sandals sold, y, for a given outdoor temperature of x d
Alexxx [7]

Answer:

99

Step-by-step explanation:

Given the linear equation:

y = 0.6x + 45

x = outdoor temping degrees ; y = number of pair of sandal sold

Number of pairs of sandals the company expect to sell if the outside temperature is 90 degrees?

y = 0.6(90) + 45

y = 54 + 45

y = 99

The expected number of sandals to sale will be 99

5 0
3 years ago
What is 3.480 divided by 0.29
Thepotemich [5.8K]
The answer is 12.
To double check mulitply 12 times 0.29 = 3.480
That is how we know 12 is the correct answer. 
7 0
4 years ago
A gram is equivalent to 0.0353 ounces. One ounce is how many grams? Round to the nearest tenth.
Marina CMI [18]

Answer:

28.3 grams

Step-by-step explanation:

One ounce is 28.3 grams.

6 0
3 years ago
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