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Korolek [52]
3 years ago
10

2x+y=10 Y=5x-11 Solve the system of equations by substitution

Mathematics
2 answers:
antoniya [11.8K]3 years ago
8 0
The answer would be (3,4)
Zina [86]3 years ago
7 0
2x+5x-11=10!
So once you combine like terms - 2x+5x, you end up with 7x-11=10
You then have to add 11 to both sides of the equal sign and you get 7x=21. If you divide both sides by 7, you end up with x=3.
Did you need what Y was, too ? If so, you just go back to the original problem:
2(3)+y=10
2 times 3 = 6+y=10.
Subtract 6 from both sides and you get Y=4!
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What are the domain and range of the function f(x) = 4(3/81)*?
Ulleksa [173]

Answer:108

Step-by-step explanation: divided 81 and 3. the answer is 27. multiply 27 x 4 you get 108.

8 0
3 years ago
A cyclist rides her bike at a rate of 30 kilometers per hour. What is this rate in kilometers per minute? How many kilometers wi
SIZIF [17.4K]
5 kilometers for 10 minutes
60 minutes= 1 hour
30 kilometers divided by 60 minutes=0.5
0.5*10 minutes= 5 kilometers for 10 minutes
5 0
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

a)

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

\mu_ \hat p =  p

\mathbf{\mu_ \hat p = 0.6}

b)

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
Can someone please help?
puteri [66]

Answer:

1)Alternate exterior

2) corresponding

3) alternate interior

4) non of these

Mark me brainliest

6 0
3 years ago
30 Points please help!! Please explain too!
sergiy2304 [10]
Initial: 200 feet = opp. side
Angle = 17.31, adj. Side = a
So tan (17.31) = opp. Side / adj. Side
tan (17.31) = 200 / a
--> a = 200/tan17.31 = 641.73
When stopped: adj. Still = a
Opp. Side still = 200, angle = 46.41
tan46.41 = 200 / a
--> a = 200/tan46.41 = 190.39
Now subtract those two distances to get the distance traveled from initial to when it stopped:
641.73 - 190.39 = 451.34 feet
3 0
3 years ago
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