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mr_godi [17]
2 years ago
5

Solve using elimination y = 3x + 4 y = 2x + 2

Mathematics
1 answer:
Murrr4er [49]2 years ago
5 0

Answer:

x=-2

y=-2

Step-by-step explanation:

express the system in standard form

-(3x)+y=4 (equation 1)

-(2x+4y=2 (equation 2)

------------------

Subtract 2/3x(equation 1) from equation 2

-(3x)+y=4 (equation 1)

0x+y/3=-2/3 (equation 2)

-----------------

Multiply equation 2 by 3

-(3x)+y=4 (equation 1)

0x+y=-2 (equation 2)

----------------

Subtract equation 2 from equation 1

-(3x)+0y=6 (equation 1)

0x+y=-2 (equation 2)

----------------

Divide equation 1 by -3:

X+0y=-2 (equation 1)

0x+y=-2 (equation 2)

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Solve the following problem algebraically: 15 = n/5.
tatyana61 [14]

Answer:

The solution of the problem algebraically is n=5.      

Step-by-step explanation:

Given : Problem - 15=\frac{n}{5}

To find : Solve the following problem algebraically ?

Solution :

We have given equation,

15=\frac{n}{5}

Multiplying 5 both side,

15\times 5=\frac{n}{5}\times 5

75=n

Therefore, The solution of the problem algebraically is n=5.

4 0
3 years ago
According to data given in this table find percentage of absentees on friday
saveliy_v [14]

Answer:

\%Absent = 80.20\%

Step-by-step explanation:

Given

The attached data

Required

%Absentee on Friday

First, calculate the total present

Present = 42 + 36 + 40 + 36 + 38

Present = 192

Calculate the %Present on Friday

\%Present = \frac{Friday}{Present} * 100\%

\%Present = \frac{38}{192} * 100\%

\%Present = \frac{3800}{192}\%

\%Present = 19.80\%

Using complement rule:

\%Absent = 100\% - \%Present

\%Absent = 100\% - 19.80\%

\%Absent = 80.20\%

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3 years ago
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3 years ago
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If a leaf on the ground is 80 feet from the base of a tree, and the angle of elevation to the top of the tree from the leaf is 4
rusak2 [61]

Answer:

82.8424 feet

Step-by-step explanation:

The leaf, the base of the tree and the top of the tree form a triangle.

The adjacent cathetus to the 46 degrees angle is 80 feet. The opposite cathetus to the 46 degrees angle is the tree height that we want to know. So, using the relation between the opposite cathetus and the adjacent cathetus (so the tangent of the angle), we can find the tree height (h):

tan(46) = h/80 = 1.0355

h = 80*1.0355 = 82.8424  feet

6 0
3 years ago
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a group of fitness club member lose a combined of 28 kilograms in 1 week .there are approximately 2.2 pounds in 11 kilogram . as
Nimfa-mama [501]

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3 years ago
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