All categories

3 years ago

What is the value of x in the equation ex- y = 30, when y = 15?

Mathematics

1 answer:

Bumek [7]3 years ago

4 0

Answer:

x = 45

Step-by-step explanation:

Solution:

x - y = 30

x - 15 = 30 ( y = 15 given)

x = 30 + 15

Therefore, x = 45

PLEASE MARK ME AS BRAINLIEST!!!

ALSO DON'T FORGET TO CHECK OUT THIS BLOG WHICH TEACHES YOU SMALL SCIENCE CONCEPTS EVERYDAY AND DONT WORRY ITS ABSOLUTELY FREE AND ITS REALLY BRIEF CONCEPTS:

ITS CALLED dynamicscience

You might be interested in

Estimate a 15% tip on a dinner bill of $31.53 by first rounding the bill amount to the nearest ten dollars.

Nookie1986 [14]

Answer:

Should be around 4.5

Step-by-step explanation:

If you round 31.53 to the nearest ten dollars, you get 30, 15 percent of 30 is 4.5

6 0

3 years ago

Read 2 more answers

Which is the graph of X^2/9-y^2/4=1

lesantik [10]

Answer:

Step-by-step explanation:

7 0

3 years ago

I need to make a matrix in reduced row echelon form

a_sh-v [17]

Let the three apartments be A, B & C

The rent of A is $x

The rent of B is $y

The rent of C is $z

So x + y + z = 1600 .......(1)

Now

Maintenance of A is 20% of x = 0.20x

Maintenance of B is 20% of y = 0.20y

Maintenance of C is 25% of z = 0.25z

0.20x + 0.20y + 0.25z = 345

Multiplying by 100 we get

20x + 20y + 25 z = 34500

Dividing by 5 we get

4x + 4y + 5z = 6900 .......(2)

Monthly fee of A is 10% of x = 0.10x

Monthly fee of B is 20% of y = 0.20 y

Monthly Fee of C is 10% of z = 0.10z

Now

0.10x + 0.20y + 0.10 z= 1820 - 1600

0.10x + 0.20y + 0.10z = 220

Multiplying by 100 we get

10x + 20y + 10z = 22000

Dividing by 10

x + 2y + z = 2200 ....(3)

Making a Matrix of equation (1), (2) & (3)

$\left[\begin{array}{ccc}1&1&1\\4&4&5\\1&2&1\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] =\left[\begin{array}{c}1600\\6900\\2200\end{array}\right]$