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2 years ago

If x=2 and y=5, evaluate the following expression: 2(x+y)

Mathematics

2 answers:

astraxan [27]2 years ago

6 0

Answer:

2(x+y)

x=2 and y=5

2x+2y

Subs

2(2)+2(5)

4+10=14

elixir [45]2 years ago

5 0

Answer:

Step-by-step explanation:

2(x+y)

2(2+5) (keeping 2 in place of x and 5 in place of y)

2(7)

2*7

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!!!!!!Need help with #’s 1 through 4 please !!!!!!!

Ivenika [448]

1. is 5 dollars an hour
2.it represents the amount of money he gets in an hour
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3 years ago

How to find the area of a triangle with a base of 32ft

Sergeu [11.5K]

Well to find the area of any figure you must first have knowledge on the formula. The formula for a triangle is 1/2 x b x h. Since you have the base 32, multiply that by 1/2 which will give you 16. Then you have to multiply 16 by the height. I'm not sure what the height is because you never gave me one but hopefully this helped! God bless :)

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3 years ago

Describe the sampling distribution of p(hat). Assume the size of the population is 30,000.

Naya [18.7K]

Answer:

a) $\mathbf{\mu_ \hat p = 0.6}$

b) $\mathbf{\sigma_p =0.01732}$

Step-by-step explanation:

Given that:

population mean $\mu$ = 30,000

sample size n = 800

population proportion p = 0.6

The mean of the the sampling distribution is equal to the population proportion.

$\mu_ \hat p = p$

$\mathbf{\mu_ \hat p = 0.6}$

The standard deviation of the sampling distribution can be estimated by using the formula:

$\sigma_p = \sqrt{\dfrac{p(1-p)}{n}}$

$\sigma_p = \sqrt{\dfrac{0.6(1-0.6)}{800}}$

$\sigma_p = \sqrt{\dfrac{0.6(0.4)}{800}}$

$\sigma_p = \sqrt{\dfrac{0.24}{800}}$

$\sigma_p = \sqrt{3 \times 10^{-4}}$

$\mathbf{\sigma_p =0.01732}$

7 0

3 years ago

You have 636.3 g of pennies and each penny weighs 3.03g. how many pennies do you have

nalin [4]

Total weight=number of pennies times weight of 1 penny
total weight/weight of 1 penny=number of pennies
636.3/3.03=210

210 pennies

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3 years ago

You drive 15 miles in one fourth of an hour. What is your average speed?

Mazyrski [523]

Hello ! I'm happy to help
the answer all revolves around this simple formula:
speed= distance/time
since you were driving for 1/4 of an hour that's 15 minutes
and we already know that you traveled 15 miles
so the speed would equal 15 miles every 15 minutes
if you want to find the total distance travelled is 15x15 =225

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3 years ago