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slega [8]
3 years ago
11

Please help You don’t have to do the first question but please help me with the rest please help me I have to finish by 6 :00 ca

use I have somewhere important to go to And I not done begging ya :(

Mathematics
1 answer:
In-s [12.5K]3 years ago
3 0

Answer:

the answer for number 3 is 35, and for 2 its 5 and 90, sorry thats all i know

Step-by-step explanation:

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men = 12

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Step-by-step explanation:

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Step-by-step explanation:


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3 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

4 0
3 years ago
The height of a right square pyramid is multiplied by 10, but the area of the base is unchanged. By what factor is the volume of
pshichka [43]

Answer:

  b 10¹

Step-by-step explanation:

Consider the volume formula:

  V = 1/3Bh . . . . B is the base area and h is the height

Replacing h by 10h gives ...

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The volume is multiplied by 10 = 10¹.

5 0
2 years ago
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