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Makovka662 [10]
3 years ago
11

Please help me solve this! 50 points.

Mathematics
2 answers:
Alex73 [517]3 years ago
7 0
Solve for x in the second equation.

Just add 1 to both sides to get x = 9y + 1

Then plug 9y + 1 into the first equation for x

7(9y+1) - 9y = 1

63y + 7 - 9y = 1

54y + 7 = 1

54y = -6

y = -6/54 or -1/9

Plug y back into one of the equations to get x = 0

Answer: (0, -1/9)
gregori [183]3 years ago
7 0
The solution is 0! Because 9x(-1/9)=x-1 which would give you 0
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An object's dimensions are: length of 25cm, wight of 10cm, and height of 15cm. calculate the object's density if its mass is 3000g
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3 years ago
If ABC is similar to DEF, determine the measure of A
nikdorinn [45]

Answer:

the answer is 66°

Step-by-step explanation:

As it is given that triangle ABC is similar to triangle DEF so

< A = < D ( being corresponding angles of similar triangles)

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matrenka [14]

Answer:

The answer is explained below

Step-by-step explanation:

The question is not complete, I would explain how to calculate the value of Z

The z score is a measure in statistic used to determine the number of standard deviations by which the raw score if from the mean of a normal distribution. If the z score is positive then the raw score is above the mean while if a z score is negative the raw score is below the mean. The z score (z) is given by the formula:

z=\frac{x-\mu}{\sigma}

Where x is the raw score, μ is the mean and σ is the standard deviation.

Let us assume that the mean (μ) = 20 and the standard deviation (σ) = 3. To calculate the z score for x = 30 it is given by:

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frutty [35]
Telling you im trying to get points sorry
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3 years ago
Read 2 more answers
49w^2-4=0. Simplied fraction?
HACTEHA [7]

Answer:

{-2/7, 2/7}

Step-by-step explanation:

Here you're being asked to solve the given equation 49w^2-4=0 for w with the hint that the solutions are fractions.

49w^2-4=0 is the product of the sum and difference of two squares:

(7w - 2)(7w + 2) = 0

Setting each factor equal to zero and solving for w, we get:

{-2/7, 2/7} as the solutions.

8 0
3 years ago
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