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egoroff_w [7]
3 years ago
6

Gonna need help answering this Y=1/2x+7 Y=x-8

Mathematics
2 answers:
Nata [24]3 years ago
3 0
What is the problem?
Hatshy [7]3 years ago
3 0
<span><span>the answer is  {y,x} = {2,10}</span> </span>
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Determine the value of x?​
olga2289 [7]

Answer:

x=38 degrees

Step-by-step explanation:

supplemental angle to 114 degrees is 66 degrees

180=x+2x+66

3x=114

x=38 degrees

7 0
2 years ago
Read 2 more answers
In 1990, 1000 adults were randomly selected and each was asked if they smoked, 300
Oduvanchick [21]

Answer:

 The proportion of smokers was higher in 1990 than in 2000

Step-by-step explanation:

Solution

Recall that,

The total number of sample 1 (n1) = 1000

Total  sample 2 number  (n2) = 2000

The number of favourable events (X1) = 300

The number of favourable events (X2) = 500

so,

p₁ = X₁/n₁ = 300/1000 = 0.3

p₂ = X₂/n₂ =500/2000 =0.25

α = 0.05

We are interested in testing the hypothesis.

The  hypothesis (Null) ....>  H₀ : p₁ = p₂

Alternate hypothesis------ > H₁ : p₁ > p₂

Thus,

P = X₁ + X₂/ n₁ + n₂

P =300 + 500/1000 +2000

P =800/3000

=0.2667

Now,

Z₀ = P₁ - P₂/√ P (1 -P) (1/n₁ + 1/n₂)

Z₀ =  0.3 - 0.25/√0.2667  (1 - 0.2667) (1/1000 + 1/2000)

Z₀ = 0.4999999999999999/√ 0.2667 (0.7333000000000001) (0.001 +0.0005)

Then,

Z₀ = 0.4999999999999999/√0.00029335666500000004

Z₀ = 2.9193

so,

zα/2 = z0.05/2 =z0.025

zα/2 = 1.6448536269514722

Now, we apply the decision rule:

Decision Rule: Reject the null hypothesis if the statistic value test is higher than the critical value 1.6448536269514722

The statistic value, 2.9193 is greater than the critical value 1.6448536269514722,  then we will reject the null hypothesis.

Therefore, the proportion of smokers was higher in 1990 than in 2000

3 0
3 years ago
A planet's year is the time it takes that planet to revolve around the Sun. A Mars year is 1.88 Earth years. If you are 13 years
Nata [24]
Mars year is 1.88 of your Earth years.
So if you are 13,

1.88 x 13=24.44, or 24 years old, I think.
6 0
3 years ago
Solve the following: 3.12 × 1,000 = _____.
torisob [31]

Answer:

60000000.00

Step-by-step explanation:

hgfgjffhvffjfujcdhbcfvjnbcccdsd

8 0
3 years ago
Find the point that is symmetric to the point (0,8) with respect to the​ x-axis, the​ y-axis, and the origin.
Sergio039 [100]

Here's link to the answer:

tinyurl.com/wpazsebu

4 0
3 years ago
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