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Bas_tet [7]
3 years ago
15

Is (1,9) a solution to this system of equations? y = x + 6 y = 2x + 7?

Mathematics
1 answer:
Alex Ar [27]3 years ago
5 0

Answer:

No, the solution of the system is (-1,5)

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WXY is a right triangle. <br><br> A. True. <br> B. False.
lora16 [44]

Answer:

B. False


Step-by-step explanation:

According to pythagorean theorem, for this to be a right triangle, the sum of  square of the length of the two legs must equal square of the length of the hypotenuse (longest side).

So  (\sqrt{34} )^{2}  should equal  (\sqrt{18} )^{2}+(\sqrt{18} )^{2}

  • <em>We also know that  (\sqrt{a} )^{2}=(\sqrt{a})(\sqrt{a})=a</em>

Hence,  (\sqrt{18} )^{2}+(\sqrt{18} )^{2}=18+18=36  , and

(\sqrt{34} )^{2}=34

They ARE NOT EQUAL, so the triangle is NOT a right triangle.

5 0
2 years ago
Read 2 more answers
In a study of
o-na [289]
We know that:
Mean = 82 mm and SD = 10 mm ( standard deviation )
82 - 3 * SD = 82 - 3 * 10 = 82 - 30 = 52 mm
82 + 3 * SD = 82 + 3 * 10 = 82 + 30 = 112 mm
Population between 52 and 112 mm is within +/- 3 standard deviations from the mean.
By the 66- 95 - 99.7 % rule it is: 99.7% of the test group.
0.977 * 500 = 498.5
Answer:
99.7 % of the test group have a diastolic pressure between 52 and 112 mm, or 498 men. 
5 0
3 years ago
What is the value of x in the equation 4 and StartFraction 3 Over 10 EndFraction minus (2 and two-fifths x + 5 and one-half) = o
musickatia [10]

Answer:

5

Step-by-step explanation:

Edge i think dont quote me on this plz

3 0
3 years ago
Solve the inequality 7y-34 ≤ 8
Vlad1618 [11]
Answer:

Explanation: start by adding 34 to both sides to make the variable stand alone giving you
7y is greater than or equal to 42
Then divide 7 into both sides to give you the answer of
Y=6
8 0
2 years ago
The ratio of boys to girls in a group is 3:1. If there are 28 more boys than girls, work out how many people there are in total.
puteri [66]

Answer:

84:56, I think?

3 x 28 for the boys then minus 28 for the girls

3 0
2 years ago
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