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3 years ago

Please help me out..........

Mathematics

2 answers:

gayaneshka [121]3 years ago

6 0

Answer:

x = 12

Step-by-step explanation:

The line joining the mid points of the non- parallel sides is parallel to the parallel sides and is equal to half the sum of the parallel sides, hence

5x - 20 = $\frac{1}{2}$ (2x + 6 + 4x + 2)

= $\frac{1}{2}$ (6x + 8) ← distribute, giving

5x - 20 = 3x + 4 ( subtract 3x from both sides )

2x - 20 = 4 ( add 20 to both sides )

2x = 24 ( divide both sides by 2 )

x = 12

gayaneshka [121]3 years ago

5 0

Answer:

x=12

Step-by-step explanation:

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Please help me i dont know how to do the down part.

torisob [31]

Answer:

40, 60, 80, 100, 120, 140, 160, 180, 200

Step-by-step explanation:as the 12 goes up by 12 the 20 goes up by 20

8 0

3 years ago

Find the equation of the line passing through the point (1, 7) with a slope of -2.

Mariulka [41]

Answer:

$y=-2x+9$

Step-by-step explanation:

we know that

The equation of a line in point slope form is equal to

$y-y1=m(x-x1)$

In this problem we have

$(x1,y1)=(1,7)\\m=-2$

substitute

$y-7=-2(x-1)$

Convert to slope intercept form

$y=mx+b$

$y-7=-2x+2$

$y=-2x+2+7$

$y=-2x+9$

4 0

3 years ago

A runner warmed up for 10 minutes and then takes seven minutes to run each mile. The total time after r miles is 45 minutes how

scoundrel [369]

So our equation to find this can be represented by 7x + 10 = 45.
(x representing miles run)
Just solve for x!

Subtract the 10 from both sides, you've got
7x = 35
And now to isolate the x, we divide both sides by 7.
Now we're left with just
x = 5!

We can check this by substituting 5 as x in our equation.
7x x 5 + 10 = 45
45 = 45
It's right!

So the runner ran 5 miles total.

Hope this helps!
If I skimmed over this too much, let me know and I'll try to explain the best that I can.

7 0

3 years ago

A right triangle with a perimeter 24 has sides of lengths 2x, (2x + 2) and (2x + 4). What is the area of the triangle?

zmey [24]

idk

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3 0

3 years ago

Read 2 more answers

Alana and Petra go to a used book sale, where every book is the same price. Alana buys 5 books and Petra buys 4 books. they run

butalik [34]

Let's say the price of one book is the variable x
Therefore, Alana is 5x and Petra is 4x
Angus bought 19x, but since he had a $10 discount, it is 19x-10
Combined, Alana and Petra is 5x+4x, but since it says Angus spent $5 more, it would be 5x+4x+5
Therefore, we get the equation:
19x-10=5x+4x+5
19x-10=9x+5
10x=15
x=15/10 or 3/2 which equals 1.5
Therefore, one book costs $1.5

6 0

4 years ago