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3 years ago

How can i evaluate the expression of , m=4 and n=9 , n+5m

Mathematics

2 answers:

nikitadnepr [17]3 years ago

8 0

First substitue. 9+5(4)
Multiply. 9+20
Add. 29

kobusy [5.1K]3 years ago

5 0

To evaluate the expression of m=4 and n=9, you would replace the variables (n and m) with the corresponding numbers. Giving you this equation: 9+5(4).
9+20 once simplified. 29 is your final answer.

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Murrr4er [49]

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3 years ago

Write a system of linear equations that has the ordered pair (1,4) as it's solition

Lemur [1.5K]

The required system of equations is $x+y=5\\x-y=-3$

Step-by-step explanation:

We need to write a system of linear equations that has the ordered pair (1,4) as it's solution.

It means we need to find system of linear equations, which after being solved gives x=1 and y=4

Let the system of equations be:

$x+y=5\\x-y=-3$

I have made equations such that adding x+y gives 5 i,e (1+4=5) and subtracting x-y gives -3 (1-4=-3)

Now solving this system of equations to find value of x:

$x+y=5\,\,eq(1)\\x-y=-3\,\,eq(2)$

Adding eq(1) and eq(2)

$x+y=5\\x-y=-3\\-----\\2x=2\\x=1$

Putting value of x=1 into eq(1) to find value of y

$x+y=5\\1+y=5\\y=5-1\\y=4$

The solution set after solving system of equations is (1,4).

The required system of equations is $x+y=5\\x-y=-3$

Keywords: System of equations

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3 years ago

Work out the value of x

Korvikt [17]

Answer:

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Step-by-step explanation:

So we already know that one angle is 38 degrees, so we have that one. The angle, 101 is exterior, and we have to subtract 180 from that to get the interior angle. We get a difference of 79. Since the sum of a triangle's interior angles are 180, we have to add 38+79 to get 117. Then, we have to subtract it from 180 to get the value of the interior angle as 63 degrees. Because x is on the outside, we have to again subtract 63 from 180 to get the missing value of x as 117.

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3 years ago

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I need someone to teach me how to solve this

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Answer:

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Step-by-step explanation:

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so, t = 90 - 40 or rearranged to t + 40 = 90

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3 years ago

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kirza4 [7]

Answer:

Step-by-step explanation:

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2 years ago