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morpeh [17]
3 years ago
5

Solve the following system of equations using the substitution method.

Mathematics
1 answer:
Novay_Z [31]3 years ago
7 0
X=2y
2x+5y=9

substitute the x=2y into the second equation
2(2y)+5y=9
multiple the 2y by 2. 4y+5y=9
combine like terms. 9y=9
divide the 9 out from both sides. y=1
plug the y back into the first equation
x=2(1)
multiply. x=2

your answer is: x=2
y=1
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hjlf

The sides of a rhombus are equal length, so you have

... 5x + 20 = 6x + 10

... 10 = x . . . . . . . . subtract 5x+10

Then the side lengths are

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5 0
2 years ago
A normal distribution has a mean of 101 and a standard deviation of 3.4. What is the z-score of 105? Enter your answer, rounded
oee [108]

Answer:

Z-score = 1.18

Step-by-step explanation:

The z-score measures how many standard deviations from the mean a data is

Therefore the z score is the quotient between the difference between a value and the mean and the standard deviation

Z =\frac{X-\mu}{\sigma}

Where

μ is the mean, x is a data of the population and \sigma is the standard deviation

In this case

\mu =101\\\\\sigma = 3.4\\\\X = 105

Then the z-score is

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4 0
3 years ago
What type of triangle is △STR? right triangle equilateral triangle isosceles triangle scalene triangle
Setler79 [48]

Answer:

C. Isosceles Triangle

Step-by-step explanation:

An Isosceles triangle is a type of triangle in geometry that has two sides of equal length.

From the figure attached, triangle STR has two sides of equal length which are;

1.) ST and

2.) TR

The two equal sides (ST and TR) are called legs while the third side is called the base of the triangle.

*P.S: I believe your question is based on the image attached

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2 years ago
If 5x = 30 then x is equal to
max2010maxim [7]

Answer:

6

Step-by-step explanation:

8 0
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