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kipiarov [429]
2 years ago
9

Find the value of X.

Mathematics
1 answer:
iris [78.8K]2 years ago
8 0

Answer:

Step-by-step explanation:

90 + 122 + 4x + 19 + 9x - 8 + 7x - 3 = 540

220 + 20x = 540

-220             -220

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

20x = 320

/20     /20

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

x = 16

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3 years ago
3x - 5y = 14 and – 2x + 2y = 0
zubka84 [21]

Answer:

x=5.6

y=-5.6

Step-by-step explanation:

3x - 5y = 14 Equation 1

– 2x + 2y = 0 Equation 2

Simultaneous equation can be solved either through elimination method or substitution method. But we use elimination method for this question

Multiply equation 1 by -2 (the coefficient of x in equation 2) and multiply equation 2 with 3 (the coefficient of x in equation 1), so that x will have the same coefficient in the new equations, and easy to eliminate

-2(3x - 5y = 14)

-6x+10y=-28 Equation 3

3(– 2x + 2y = 0)

-6x+6y=0 Equation 4

Subtract equation 4 from 3 to eliminate x

-6x+10y=-28

-6x+6y=0

-6x-(-6x)=-6x+6x=0

10y-6y=5y

-28-0=-28

5y=-28

y=-28/5

y=-5.6

Substitute for y in equation 2

– 2x + 2y = 0

– 2x + 2(-5.6) = 0

-2x-11.2=0

-2x=11.2

x=-11.2/2

x=5.6

7 0
2 years ago
Write an equation of the line in either point slope or slope intercept form that passes through the points (3,5) and (2,-2). (Hi
Jobisdone [24]

Answer:

Step-by-step explanation:

slope= y2-y1 / x2-x1

= -2-5 / 2-3

= -7 / -1

= 1

6 0
2 years ago
Urgent help needed. Will mark you brainlest when correct
posledela

Question 7: Option (4)

A=(3/8)^2=\frac{9}{64}

Question 8: Option (3)

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2 years ago
Lesson Check (4.MD.C.7)
vredina [299]
The measure of Zx is 4
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3 years ago
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