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3 years ago

PLS HELP ILL MARK AS BRAINLIST AND FOLLOW U

Mathematics

1 answer:

aleksandrvk [35]3 years ago

7 0

Answer:

Step-by-step explanation:

For the calculation for triangle area is wrong

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Kim's age is twice that of her sister. When you add Kim's age to her sister's age, you get 36. How old is each sister?

eimsori [14]

   A. 2x+x=36
        x=12

B. 2(12)+12=36
      24+12=36

C. Brainliest if satisfied :D

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3 years ago

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Find the rate of change <br>(Pls help!)

kolbaska11 [484]

Answer: 11.5

Step-by-step explanation:

It’s delta y over delta x so you would take any two combination of coordinates and subtract and divide. I used 57.50-23 over 5-2... this gets you 34.5 over 3. This is also equal to 11.5 :)

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3 years ago

100 POINTS!!! Paige has 3 coats: a pink one, a red one, and a white one. She has a black scarf, a gray scarf and 1 set of white

kvv77 [185]

She has 3 coats, 2 scarfs, and 1 gloves.

She has (3*2*1=6) ways to choose 1 coat, 1 scarf, and 1 gloves.

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3 years ago

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Find the area of 8/3cmX24/4cm

AfilCa [17]

32/72
because you keep 8/3 and the multiplication sign and then flip the 24/4 to 4/24 and then solve for that and then the simplified answer would be 4/9

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3 years ago

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The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is . The US

alexandr1967 [171]

Answer:

The answer is "23, 62, and 139"

Step-by-step explanation:

In point a:

$\to \sigma = \$0.24\\\\ \to E = \$0.10\\\\ 95\% \text{confidence level of the z}: \\\\\to \alpha = 1 - 95\% = 1 - 0.95 = 0.05\\\\\to \frac{\alpha}{2} = \frac{0.05}{2} = 0.025\\\\\to Z_{\frac{\alpha}{2}} = Z_{0.025} = 1.96\\\\$

Calculating the sample size:

$\to n = (\frac{(Z_{\frac{\alpha}{2}} \times \sigma)}{E})^2$

$= (\frac{(1.96 \times 0.24 )}{0.10})^2\\\\= 22.13 \approx 23$

In point b:

$\to \sigma = \$0.24\\\\\to E = \$0.06\\\\\to Z_{\frac{\alpha}{2}} = Z_{0.025} = 1.96\\\\\to n = (\frac{(Z_{\frac{\alpha}{2}} \times \sigma )}{E})^2\\\\$

$= (\frac{(1.96 \times 0.24 )}{0.06})^2\\\\= 61.47 \approx 62$

In point c:

$\to \sigma = \$0.24\\\\\to E =\$0.04\\\\\to Z_{\frac{\alpha}{2}} = Z_{0.025} = 1.96\\\\\to n = (\frac{(Z_{\frac{\alpha}{2}} \times \sigma )}{E})^2\\\\$

$= (\frac{(1.96\times 0.24 )}{0.04})^2 \\\\=138.30 \approx 139$

4 0

3 years ago