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3 years ago

What are the values of a and b?

Mathematics

1 answer:

liberstina [14]3 years ago

6 0

B=10 and a=8 because if we look at that shape we can see that is two right angles on the both sides of that tape and it's suggesting that the shape is equally to there another shape of that right angle

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Management of a particular golf course wants to know what the average score is for their course. It is known that from previous

babunello [35]

Answer: c. $70\pm (1.96)\dfrac{4.5}{\sqrt{50}}$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where n= sample size

$\overline{x}$ = sample mean.

z*= Critical value.

$\sigma$ = population standard deviation.

As per given , we have

n= 50

$\sigma=4.5$

$\overline{x}=70$

Also, we know that the critical value for 95% confidence interval : z*= 1.96

Then, the 95% confidence interval (CI) to estimate the true average score of golfers on this particular course will be :

$70\pm (1.96)\dfrac{4.5}{\sqrt{50}}$ (substitute all the value in the above formula.)

Hence, the correct option is c. $70\pm (1.96)\dfrac{4.5}{\sqrt{50}}$

6 0

3 years ago

The cost of coffee is determined by the type of coffee beans that are mixed together. The cost of a local mix of Arabica and Rob

Andreyy89

Answer:

If a mixture contains 1000 pounds of Arabica beans, there should be <u>250 pounds of Robusta beans</u> in the mixture.

Step-by-step explanation:

700A+1,200R=1,000,000

700(1000) +1,200R=1,000,000 - First, plug in the A value and simplify .

700000+1,200R=1,000,000 - Then, subtract 700,000 from both sides.

1,200R=300,000 - Finally, divide by 1,200 on both sides of the equation.

R=250 - This is your value for R, or the Robusta beans.

<u>250 pounds of Robusta beans</u>

Hope this helps!

7 0

3 years ago

The sum of 5 times the width of a rectangle and twice its length is 26 units. The difference of 15 times the width and three tim

Zinaida [17]

Answer: length = 8 units

Width = 2 units

Step-by-step explanation:

Let the length of the rectangle be represented by L

Let the width of the rectangle be represented by W

The sum of 5 times the width of a rectangle and twice its length is 26 units. This means that

5W + 2L = 26 - - - - - - - - 1

The difference of 15 times the width and three times the length is 6 units. It means that

15W - 3L = 6 - - - - - - - - 2

The system equations are equation 1 and equation 2.

Multiplying equation 1 by 3 and equation 2 by 2, it becomes

15W + 6L = 78

30W - 6L = 12

Adding both equations,

45W = 90

W = 90/45 = 2

15W - 3L = 6

15×2 - 3L = 6

-3L = 6 - 30 = - 24

L = - 24/ -3 = 8

7 0

3 years ago

Help with this please

Delicious77 [7]

D.) 8 hours the number of hours students spend time on social media when they do not read.

8 0

3 years ago

What is 241.5 divided by 14 rounded to the nearest tenth

ludmilkaskok [199]

Answer:

17.3 because it was 17.25 so you round

8 0

4 years ago