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stepan [7]
2 years ago
5

SHOW YOUR WORK,Solve this system of equations for x using the addition method

Mathematics
1 answer:
maria [59]2 years ago
4 0

Answer:

NUMBER 1.)

Step 1

Subtract 3y3y from both sides.

5x=10-3y5x=10−3y

Step 2

Divide both sides by 55.

\frac{5x}{5}=\frac{10-3y}{5}

5

5x

=

5

10−3y

Hint

Undo multiplication by dividing both sides by one factor.

Step 3

Dividing by 55 undoes the multiplication by 55.

x=\frac{10-3y}{5}x=

5

10−3y

Hint

Undo multiplication.

Step 4

Divide 10-3y10−3y by 55.

x=-\frac{3y}{5}+2x=−

5

3y

+2

Hint

Divide.

Solution

x=-\frac{3y}{5}+2x=−5

3y+2

Step-by-step explanation:

NUMBER 2.)

Step 1

Add 4y4y to both sides.

3x=6+4y3x=6+4y

Step 2

The equation is in standard form.

3x=4y+63x=4y+6

Step 3

Divide both sides by 33.

\frac{3x}{3}=\frac{4y+6}{3}

3

3x

=

3

4y+6

Hint

Undo multiplication by dividing both sides by one factor.

Step 4

Dividing by 33 undoes the multiplication by 33.

x=\frac{4y+6}{3}x=

3

4y+6

Hint

Undo multiplication.

Step 5

Divide 6+4y6+4y by 33.

x=\frac{4y}{3}+2x=

3

4y

+2

Hint

Divide.

Solution

x=\frac{4y}{3}+2x= 3

4y+2

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Step-by-step explanation:

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8 0
2 years ago
Find the area of the composite shape below.<br> help to get sum coin
enot [183]

Answer:

Composite Area = 1105.94

Step-by-step explanation:

Remark

The two semi circles at each end make an entire circle with radius 11. The width of the central rectangle = the diameter of the circle. The area should be able to be found.

Width

2*radius = width

width = 2 * 11

width = 22

Area of the circle

Area = pi * r^2

r = 11

Area = 3.14 * 11^2

Area = 3.14 * 121

Area = 379.94

Area of the rectangle

Area = L * W

L = 33

W = 22

Area = 33 * 22

Area = 726

Total Area

Total Area = Area of Rectangle + Area of the Circle

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3 0
3 years ago
I need help with this
slega [8]
Y is greater than or equal to 5. It says no less than, making the equal to possible.
6 0
3 years ago
The manager of a store orders sets of bunk beds that cost $25 and sells them for $59. What
o-na [289]

Answer:

The mark-up percentage is 136%

Step-by-step explanation:

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7 0
2 years ago
A researcher is interested in finding a 90% confidence interval for the mean number minutes students are concentrating on their
Mekhanik [1.2K]

Step-by-step explanation:

Given that,

Point estimate = sample mean = \bar x = 32.9

sample standard deviation = s = 12.1

sample size = n = 114

Degrees of freedom = df = n - 1 = 114 - 1 = 113

a) t distribution,

b) At 90% confidence level

\alpha = 1 - 90%

\alpha =1 - 0.90 =0.10

\alpha/2 = 0.05

t\alpha/2,df = t0.05,113 = 1.658

Margin of error = E = t\alpha/2,df * (s /\sqrtn)

= 1.658 * (12.1 / \sqrt 114 )

Margin of error = E = 1.879

The 90% confidence interval estimate of the population mean is,

T  ± E  

= 32.9 ± 1.879

= ( 31.021, 34.779 )

With 90% confidence the population mean minutes of concentration is between 31.021 and 34.779 minutes.

c)  If many groups of 114 randomly selected members are studied, then a different confidence interval would be produced from each group. About 90 percent of these confidence intervals will contain the true population mean minutes of concentration and about 10 percent will not contain the true population mean minutes of concentration.

8 0
3 years ago
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