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bulgar [2K]
3 years ago
5

What is 9 + 10 CORRECT ANSWER WILL GET BRAINLIEST!!!!SHOW ALL STEPS​

Mathematics
2 answers:
Tema [17]3 years ago
8 0

Answer:

19

Step-by-step explanation:

if you add 9 to the number 10, you get 19

 10

<u>+ 9</u>

 <u>19</u>

Juli2301 [7.4K]3 years ago
5 0
Answer:
19

Explanation:
calculator
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What is the degree of the following polynomial?<br> -4x + 5x2 – 2x5 + 12
djyliett [7]

Answer:

5

Step-by-step explanation:

The highest power of x will be the degree of the polynomial.

4 0
3 years ago
The number of hours worked per year per person in a state is normally distributed with a standard deviation of 39. A sample of 1
evablogger [386]

Answer:

The 98% confidence interval for the population mean number of hours worked per year per person is (2146, 2193).

Step-by-step explanation:

The question is incomplete.

The number of hours registered in the sample are:

2051 2061 2162 2167 2169 2171

2180 2183 2186 2195 2196 2198

2205 2210 2211

The sample mean can be calculated as:

M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{15}(2051+2061+2162+2167+2169+2171+2180+2183+2186+2195+2196+2198+2205+2210+2211)\\\\\\M=\dfrac{32545}{15}\\\\\\M=2169.67\\\\\\

We have to calculate a 98% confidence interval for the mean.

The population standard deviation is know and is σ=39.

The sample mean is M=2169.67.

The sample size is N=15.

As σ is known, the standard error of the mean (σM) is calculated as:

\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{39}{\sqrt{15}}=\dfrac{39}{3.873}=10.07

The z-value for a 98% confidence interval is z=2.326.

The margin of error (MOE) can be calculated as:

MOE=z\cdot \sigma_M=2.326 \cdot 10.07=23.43

Then, the lower and upper bounds of the confidence interval are:

LL=M-t \cdot s_M = 2169.67-23.43=2146\\\\UL=M+t \cdot s_M = 2169.67+23.43=2193

The 98% confidence interval for the population mean is (2146, 2193).

3 0
3 years ago
Someone please help me!!
Nata [24]

Answer:

its a for 6, b for 7, and a for 8

Step-by-step explanation:

heress how i did it  ₙₓₙ⁺⁽°⁴₊₋²₆ÜààÆŒ

8 0
2 years ago
To make 1 1/2 dozen muffins, a recipe uses 3 1/2 cups of flour.
zimovet [89]

Answer:

the answer is 2 1/3 or There is 2\frac{11}{14}\ cups needed to make every dozen of muffins.

Step-by-step explanation:

brainly.com/question/6703040

7 0
2 years ago
Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).
seropon [69]

Answer:

y = -\frac{1}{2}(x^2-2x-8)

Simplified it is y=-\frac{1}{2}x^2+x+4

Step-by-step explanation:

The x-intercepts of a parabola form the factors of the equation. Since the x -intercepts are (-2,0) and (4,0) then the factors are (x+2) and (x-4). Factors are pieces which multiply to make the equation.

y=(x+2)(x-4)\\y=x^2+2x-4x-8\\y=x^2-2x-8

This is the standard form of the parabola ax^2+bx+c. Since the y-intercept of the parabola is (0,4) then a number must also be multiplied to it

y=a(x^2-2x-8)

We find a by plugging in x=0 and y=4.

4=a(0^2-2(0)-8)\\4=a(0-0-8)\\4=a(-8)\\\frac{4}{-8} = a\\\frac{-1}{2} = a

So the equation is y = -\frac{1}{2}(x^2-2x-8).

When simplified it is y=-\frac{1}{2}x^2+x+4


3 0
3 years ago
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