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Alex787 [66]
3 years ago
13

X-5y=16 , 4x-2y=-8 solve using elimination method

Mathematics
1 answer:
serious [3.7K]3 years ago
8 0

Answer:

x = -4

y = -4

Step-by-step explanation:

L1     x - 5y = 16

L2  4x - 2y = -8

4*L1 - L2

4x - 20y = 64

-4x + 2y  =    8

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

      -18y = 72

          y = 72 / -18

          y = -4

x - 5y = 16

x = 16 + 5y

x = 16 + 5(-4)

x = 16 - 20

x = -4

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mission of red marbles to blue marbles in a charge 2 to 5 if there are 35 blue marbles in the jar how many red marbles are there
kotegsom [21]

Answer:

there are 14 red marbles

Step-by-step explanation:

the ratio 2:5 is equivalent to 14:35

7 0
3 years ago
When a truck is loaded to 45% of capacity, there are 108 cases on the truck. How many cases will be on a full load.
natita [175]

Answer:

48 full

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
In the next election, 15,000 people will actually vote for Candidate A. A poll has a percent error of 4%. Which statement descri
salantis [7]

The poll has an error of 600 votes. The total number of votes including the error shown by the poll is 15600 or 14400.

Statement B is correct.

<h3>What is the percentage?</h3>

A percentage can be defined as a relative number that shows the hundredth part of the given number. The percentage is represented by the sign "%".

Given that In the next election, 15,000 people will actually vote for Candidate A. A poll has a percent error of 4%.

The error can be calculated as given below.

error = 15000 \times \dfrac {4}{100}

error = 600

The poll has an error of 600 votes. This will affect the total number of votes in the election.

The total number of votes V including errors are given as,

<em />

<em />V = 15000 +/- error

V = 15000 + 600 = 15600

or

V = 15000-600 = 14400

Hence we can conclude that the total number of votes including the error shown by the poll is 15600 or 14400. Statement B is correct.

To know more about the percentage, follow the link given below.

brainly.com/question/8011401.

<em />

5 0
2 years ago
Plz help me i have to say in meters the area of the gray area help meeeeee :((((((
Virty [35]

Answer:

  • 1200 cm²

Step-by-step explanation:

<u>The gray triangles have</u>

  • Base of 20 cm and added height of 60 cm for 2 triangles in each section of AMND and MNCB

<u>The grey area in total is</u>

  • 1/2*20*60 + 1/2*20*60 = 20*60 = 1200 cm²
8 0
3 years ago
Find the smallest zero solution of h(x)= 4x^2-8x-60
Komok [63]
-3.

Multiply 60 with 4 and then find the factor when added together which would give you the middle number. Notice that because it is a negative equation that both signs are negative. This means that the biggest factor of 240 will be negative.

Then, rewrite the equation 4x^2 +12x -20x -60 and divide it into two parts (4x^2 + 12x) (-20x-60) and then factor each part. If done correctly, the numbers left in the parenthesis should be the same. This way the part outside is one factor and the part inside is the other. This should get you 4x -20 and x +3.

Set both equal to zero and you get your two solutions. One is -3 and the other is 5.

Hope this helps!
4 0
4 years ago
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