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Svetradugi [14.3K]
3 years ago
11

Find the value of x. I got 15 as my answer, but it was incorrect.

Mathematics
2 answers:
77julia77 [94]3 years ago
6 0
Add them all and make usual to 180
the x value is equal to 10
Lina20 [59]3 years ago
5 0
7x +(3x-5)+(8x+5)=180
simplify
18x=180
divide by 18
x=10
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Solve using elimination<br><br> 2x+5y=34<br> x+2y=14
Darina [25.2K]

2x + 5y = 34

x+2y = 14


Multiply the second equation by two to create like terms for one variable.

2(x+2y = 14)

2x + 4y = 28


2x + 5y = 34

2x + 4y = 28 -- Subtract.


y = 34.28 = 6


Solve for x


x + 2(6) = 14

x + 12 = 14

x = 2


Check:

2 + 2(6) = 14

2 + 12 = 14

14 = 14


Answer:

X = 2

Y = 6

8 0
3 years ago
What is the y-intercept of y = 1 + 6x?
Tcecarenko [31]

Answer:

Hey!

Your answer is 1 (the y-intercept is 1)

Step-by-step explanation:

x-intercept =  ( − 1/ 6  , 0 )

y-intercept =  ( 0 , 1 )

Explanation:

Slope formula is

=  r i s e/ r u n

 Since 6 is obviously  6/ 1 then...

we know that the slope goes up 6 units

and right 1 unit on a graph.  

Next we have  to find the y-intercept of the line

of y=6x+1, you substitute x as x=0.

y = 6

x + 1

y = 6 ( 0 ) + 1

so then y = 1

HOPE THIS HELPS!!

8 0
3 years ago
Read 2 more answers
Write the point-slope form of the equation of the line that passes through the origin and has a slope of 2. Include your work in
Shkiper50 [21]
Y=2x+0. The two would be next to the x, because that represents the slope. And it would plus zero, because zero is the initial value, since it's passing through the origin.
3 0
3 years ago
The vector parametric equation for the line through the points (−1,−4,2) and (−1,0,−3) is:_______
ollegr [7]

Answer: x(t)=-1

y(t)=-4+4(t)

z(t)=2-5(t)

Step-by-step explanation:

To find: The vector parametric equations for the line through the points (−1,−4,2) and (−1,0,−3).

Let A (−1,−4,2) and B(−1,0,−3)

First we find direction vectors : \overrightarrow{AB}=

Now, the parametric equations of the line:

x(t)=-1+0(t)

y(t)=-4+4(t)

z(t)=2-5(t)

Hence, the vector parametric equations for the line through the points (−1,−4,2) and (−1,0,−3):

x(t)=-1

y(t)=-4+4(t)

z(t)=2-5(t)

5 0
3 years ago
Given the factors, name the roots.<br> 3. f(x) = -3(2x – 5)(x + 2)
tekilochka [14]

Answer:

x = 5/2

or

x = -2

Step-by-step explanation:

recall that the roots of a function f(x) are basically the values of x that will make f(x) = 0,

we find these values of x by making f(x) = 0 and then solving the equation for x,

in our case,

f(x) = -3(2x – 5)(x + 2)

to find roots,

f(x) = 0

-3(2x – 5)(x + 2) = 0

Equating each factor = 0, the equation can be broken down into:

-3 = 0 (obviously not valid, hence we can ignore this)

or

(2x – 5) = 0     add 5 to both sides

2x = 5              divide both sides by 2

x = 5/2   ( Answer)

or

(x + 2) = 0      subtract 2 from both sides

x = -2 (Answer)

6 0
3 years ago
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