Answer:
The value of x is - 3 And The value of y = - 2
Step-by-step explanation:
Given equation as :
3 x - 8 y = 7 ......A
x + 2 y = - 7 ......B
<u>Applying Linear combination method :</u>
A linear combination method in which steps are taken to make both equation coefficient as like terms to get the value of variable .
<u>Step 1 </u>
multiply the equation B with 4
I,e 4 × ( x+ 2 y ) = - 7 × 4
or, 4 x + 8 y = - 28 ......C
<u>Step 2</u>
Arrange equation A and C in column
So , 3 x - 8 y = 7 .
4 x + 8 y = - 28
<u>Step 3</u>
Add Eq 3 with Eq 1
I.e ( 4 x + 8 y ) + ( 3 x - 8 y ) = 7 - 28
Or. ( 4 x + 3 x ) + ( 8 y - 8 y ) = - 21
Or, 7 x + 0 = - 21
∴ x = - 
= - 3
Put the value of x in eq A , to get the value of y
So , 3 × ( - 3 ) - 8 y = 7
Or, - 9 - 8 y = 7
Or, 8 y = - 9 - 7 = - 16
∴ y = 
= - 2
Hence The value of x is - 3 And The value of y = - 2 Answer
The value of the building would be $699,400 in 4 years.
<h3>What will be the value of the building?</h3>
Depreciation is the when the value of an asset reduces as a result of wear and tear. Straight line depreciation is a method used in depreciating the value of an asset linearly with the passage of time.
The equation that can be used to determine the value of the building with a straight line depreciation is:
Value of the asset = initial value of the asset - (number of months x deprecation rate)
y = 829,000 - 2700x
The first step is to determine the number of months it would take for the building to have a value of $699,400.
$699,400 = 829,000 - 2700x
829,000 - 699,400 = 2,700x
129,600 = 2,700x
x = 129,600 / 2,700
x = 48 months
Now convert, months to years
1 year = 12 months
48 / 12 = 4 years
To learn more about depreciation, please check: brainly.com/question/11974283
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If C is a point between AB then we can write AC + CB = AB
Same way we can write tu + ub = tb
tu = 4x - 1 , ub = 2x - 1 and tb = 5x
So we can write it as
So x is = 2.
Answer:
51°
Step-by-step explanation:
Remember, all 3 angles must add up to 180°
We can tell that this triangle is a right triangle, or a triangle that has a 90° angle. We also have another angle given, which is 39°. Currently we have two angles given.
Since all 3 angles have to add up to 180°,
90 + 39 + x = 180°
129 + x = 180°
180 - 129 = x
x = 51°
The missing angle is 51°
To see if your calculation is correct, you could add all 3 angles, and it should give you 180 as a sum.
90 + 39 + 51 = 180
Correct!
The difference is 15 mph .
