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3 years ago

-5 (x-1)-x+1 = -18 help please

Mathematics

1 answer:

SVETLANKA909090 [29]3 years ago

4 0

Answer:

The value of x is 4.

Step-by-step explanation:

-5(x-1)-x+1= -18

or, -5x+5-x+1=-18

or, -6x+6= -18

or, -6(x-1)=-18

or, x-1=3

or, x=4

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A bike store sells scooters at a 54% markup if the store sells each scooter for $69.30 then what is their non-markup price

liq [111]

Answer:

$45

Step-by-step explanation:

1.54(x) = 69.3

Divide both sides by 1.54

x = 45

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3 years ago

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2 years ago

What is the distance rounded to the nearest tenth between the points(-5, 3) and (1, -1)?

kakasveta [241]

7.2 units is the distance between the two points (-5,3) and (1, -1).

The formula used for determining the distance between two points is shown below. In case this equation is used for finding the distance between the origin and a point, the value of x1 and y1 would just be equal to zero.

distance = $\sqrt{(x2-x1)^{2}+(y2-y1)^{2} }$

The given points can be directly substituted for the formula.

Let: x2= 1, x1= -5, y2= -1, and y1= 3

distance = $\sqrt{[1-(-5)]^{2} + (-1 -3)^2 }$

distance = $\sqrt{(6)^2+(-4)^2}$

distance = $\sqrt{52}$ or 7.21 units

When rounded to the nearest tenth, the distance between the two points would be 7.2 units.

For more information regarding the distance between points, please refer to the link brainly.com/question/23848540.

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2 years ago

For what value of k will the lines x+2y=0, 3x-4y-10=0 and 5x+ky-7=0 are concurrent?

konstantin123 [22]

Answer:

After solve the equations we get value of k=3

Step-by-step explanation:

We need to find value of k for which the lines x+2y=0, 3x-4y-10=0 and 5x+ky-7=0 are concurrent.

If the lines are concurrent, they pass through same point.

Let:

$x+2y=0--eq(1)\\ 3x-4y-10=0--eq(2)\\ 5x+ky-7=0--eq(3)$

First solving equation 1 and 2 to find values of x and y

From eq(1) we find value of x and put it in eq(2)

$From \ eq(1) x+2y=0\\x=-2y\\Put x=-2y \ in \ eq(2)\\3x-4y-10=0\\3(-2y)-4y-10=0 \\-6y-4y=10\\-10y=10\\y=\frac{10}{-10}\\y=-1$

After solving we get value of y=-1

Now putting in eq(1) to get value of x

$x+2y=0\\x+2(-1)=0\\x-2=0\\x=2$

So, Value of x= 2

Now put value of x=2 and y=-1 into eq(3) to find value of k

$5x+ky-7=0\\5(2)+k(-1)-7=0\\10-k-7=0\\-k+3=0\\-k=-3\\k=3$

So, After solve the equations we get value of k=3

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2 years ago

A triangle’s angle measures are in the extended ratio of 2:4:9 find the measures

lidiya [134]

Answer: 24°, 48°, 108°

Step-by-step explanation:

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1 year ago

-5 (x-1)-x+1 = -18 help please​

-5 (x-1)-x+1 = -18 help please